Date   

Re: Flush Type Finishing Washer Used on Tail?

Richard Gammon <gamzoom@...>
 

Hi Corbin,
 
Looking at the Hardware section, HA, in the Aircraft Spruce and Specialty Co. catalog, you will find them under :
Tinnerman countersunk washers.
 
There are a few types to choose from.  Stainless, plated spring steel, (and G8 with No8 hole OD as a No10 .
 
All are for AN or MS flat head/countersunk screws.
The correct screws are NAS514 Philips flat head or MS24694C Stainless Steel.
Note all are 100 deg heads and NOT the hardware store angle or the familiar wood countersink angle.
 
I am trusting that the Q installation design was using all AN or MS fasteners. Of The same thread sizes, AN,MS threads are of a closer fit to give a stronger fastener. (incase you wondered).
 
Aircraft Spruce number is 877 477 7823 or online catalog, www.aircraftspruce.com
You can order a free of charge catalog but is “one and a half inch thick”, so use online unless you like thick books or are building a plane.
 
Richard G
*************

Sent: Saturday, February 05, 2022 4:23 PM
Subject: [Q-List] Flush Type Finishing Washer Used on Tail?
 
I am trying to find the flush-type finishing washer used with the screws to join the tail to the fuselage.  I don't believe they are conical washers so I am hoping many of us out there know what I am referring to.  There are likely so many different ways to connect the tail but if anyone knows what I am talking about and the size/name I would greatly appreciate it. 

I don't have access to my plans right now but will in a day or two and can look through in case these are a "per plan" part.
--

Corbin
N121CG


Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Jay Scheevel
 

Sorry I had to miss this morning but I am looking forward to catching up with the show when it is online. Thanks especially to Sam for archiving those for us slackers.

Cheers,
Jay


On Feb 12, 2022, at 5:00 PM, Dave Dugas via groups.io <davedq2@...> wrote:

I agree. Thank you Sam, and great job Matthew. Very interesting stuff.
Dave D


On Sat, Feb 12, 2022 at 6:45 PM, Kevin Boddicker
<trumanst@...> wrote:
I too enjoyed the show.
Thanks Sam and Matthew.
It seems to me that Sam asked me what I thought of the idea of Zoom meetings almost two years ago.
I told him it was a great idea. He said “good, cause you are gonna be first”.
Still a great idea and a smashing success. 
Bravo Sam!!!


Kevin Boddicker
TriQ 200 N7868B   570 hrs
Luana, IA.



On Feb 12, 2022, at 11:18 AM, Rick Hole via groups.io <r.hole@...> wrote:

Oh, that was a fun time on the Zoom.  Thank you, Matthew, for a good presentation.
 
 
Rick Hole
Tegucigalpa, Honduras
 
From: main@Q-List.groups.io [mailto:main@Q-List.groups.io] On Behalf Of Sam Hoskins
Sent: Thursday, February 10, 2022 5:21 PM
To: main@Q-List.groups.io
Subject: [Q-List] Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time
 
Please note the time, it is a little different.  It should be a really interesting presentation.

This month's Q-Tour features Matthew Curcio.  I met Matthew at Oshkosh a few years ago. He was living in Ohio and had just acquired a Q-200. He got the plane up and running and got a job at Scaled Composites. Since then, he has flown in each of the lower 48 states and also to Barrow, Alaska. He made several modifications to turn his Q-200 into a real long distance plane. This will be a really interesting Q-tour, be sure to join us. 

Sam Hoskins is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://us04web.zoom.us/j/74483660582?pwd=Hz8O3XihCBUy-wqi5R654OmwkZjpKK.1

Meeting ID: 744 8366 0582
Passcode: TZ09hX



Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Dave Dugas
 

I agree. Thank you Sam, and great job Matthew. Very interesting stuff.
Dave D


On Sat, Feb 12, 2022 at 6:45 PM, Kevin Boddicker
<trumanst@...> wrote:
I too enjoyed the show.
Thanks Sam and Matthew.
It seems to me that Sam asked me what I thought of the idea of Zoom meetings almost two years ago.
I told him it was a great idea. He said “good, cause you are gonna be first”.
Still a great idea and a smashing success. 
Bravo Sam!!!


Kevin Boddicker
TriQ 200 N7868B   570 hrs
Luana, IA.



On Feb 12, 2022, at 11:18 AM, Rick Hole via groups.io <r.hole@...> wrote:

Oh, that was a fun time on the Zoom.  Thank you, Matthew, for a good presentation.
 
 
Rick Hole
Tegucigalpa, Honduras
 
From: main@Q-List.groups.io [mailto:main@Q-List.groups.io] On Behalf Of Sam Hoskins
Sent: Thursday, February 10, 2022 5:21 PM
To: main@Q-List.groups.io
Subject: [Q-List] Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time
 
Please note the time, it is a little different.  It should be a really interesting presentation.

This month's Q-Tour features Matthew Curcio.  I met Matthew at Oshkosh a few years ago. He was living in Ohio and had just acquired a Q-200. He got the plane up and running and got a job at Scaled Composites. Since then, he has flown in each of the lower 48 states and also to Barrow, Alaska. He made several modifications to turn his Q-200 into a real long distance plane. This will be a really interesting Q-tour, be sure to join us. 

Sam Hoskins is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://us04web.zoom.us/j/74483660582?pwd=Hz8O3XihCBUy-wqi5R654OmwkZjpKK.1

Meeting ID: 744 8366 0582
Passcode: TZ09hX



Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Kevin Boddicker
 

I too enjoyed the show.
Thanks Sam and Matthew.
It seems to me that Sam asked me what I thought of the idea of Zoom meetings almost two years ago.
I told him it was a great idea. He said “good, cause you are gonna be first”.
Still a great idea and a smashing success. 
Bravo Sam!!!


Kevin Boddicker
TriQ 200 N7868B   570 hrs
Luana, IA.



On Feb 12, 2022, at 11:18 AM, Rick Hole via groups.io <r.hole@...> wrote:

Oh, that was a fun time on the Zoom.  Thank you, Matthew, for a good presentation.
 
 
Rick Hole
Tegucigalpa, Honduras
 
From: main@Q-List.groups.io [mailto:main@Q-List.groups.io] On Behalf Of Sam Hoskins
Sent: Thursday, February 10, 2022 5:21 PM
To: main@Q-List.groups.io
Subject: [Q-List] Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time
 
Please note the time, it is a little different.  It should be a really interesting presentation.

This month's Q-Tour features Matthew Curcio.  I met Matthew at Oshkosh a few years ago. He was living in Ohio and had just acquired a Q-200. He got the plane up and running and got a job at Scaled Composites. Since then, he has flown in each of the lower 48 states and also to Barrow, Alaska. He made several modifications to turn his Q-200 into a real long distance plane. This will be a really interesting Q-tour, be sure to join us. 

Sam Hoskins is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://us04web.zoom.us/j/74483660582?pwd=Hz8O3XihCBUy-wqi5R654OmwkZjpKK.1

Meeting ID: 744 8366 0582
Passcode: TZ09hX



Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Sam Hoskins
 

Yes, it will be a couple of days though.  I'll send out an announcement when it's posted to YouTube.

Sam

On Sat, Feb 12, 2022 at 12:02 PM Ian Ashdown <ian.ashdown@...> wrote:
I’m afraid I missed the show!  Will it be posted somewhere for viewing later?

Ian


Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Ian Ashdown
 

I’m afraid I missed the show!  Will it be posted somewhere for viewing later?

Ian


Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Rick Hole
 

Oh, that was a fun time on the Zoom.  Thank you, Matthew, for a good presentation.

 

 

Rick Hole

Tegucigalpa, Honduras

 

From: main@Q-List.groups.io [mailto:main@Q-List.groups.io] On Behalf Of Sam Hoskins
Sent: Thursday, February 10, 2022 5:21 PM
To: main@Q-List.groups.io
Subject: [Q-List] Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

 

Please note the time, it is a little different.  It should be a really interesting presentation.

This month's Q-Tour features Matthew Curcio.  I met Matthew at Oshkosh a few years ago. He was living in Ohio and had just acquired a Q-200. He got the plane up and running and got a job at Scaled Composites. Since then, he has flown in each of the lower 48 states and also to Barrow, Alaska. He made several modifications to turn his Q-200 into a real long distance plane. This will be a really interesting Q-tour, be sure to join us. 

Sam Hoskins is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://us04web.zoom.us/j/74483660582?pwd=Hz8O3XihCBUy-wqi5R654OmwkZjpKK.1

Meeting ID: 744 8366 0582
Passcode: TZ09hX


Re: Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Corbin <c_geiser@...>
 

That was great.  Thanks Matthew and Sam!

Corbin


On Feb 10, 2022, at 5:20 PM, Sam Hoskins <sam.hoskins@...> wrote:

Please note the time, it is a little different.  It should be a really interesting presentation.

This month's Q-Tour features Matthew Curcio.  I met Matthew at Oshkosh a few years ago. He was living in Ohio and had just acquired a Q-200. He got the plane up and running and got a job at Scaled Composites. Since then, he has flown in each of the lower 48 states and also to Barrow, Alaska. He made several modifications to turn his Q-200 into a real long distance plane. This will be a really interesting Q-tour, be sure to join us. 

Sam Hoskins is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://us04web.zoom.us/j/74483660582?pwd=Hz8O3XihCBUy-wqi5R654OmwkZjpKK.1

Meeting ID: 744 8366 0582
Passcode: TZ09hX


--

Corbin 
N121CG


Re: Flush Type Finishing Washer Used on Tail?

Chris Walterson
 

Michael---------  Those are the same screws that came with the kit, however mine are stainless.  I use a thin washer underneath to prevent mashing the pain.------------  Chris

--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: Flush Type Finishing Washer Used on Tail?

Michael Dunning
 

Made it to the hangar today:

--
-MD
#2827 (still thinking about planning on visualizing how to finish building)


Re: Q2/200 Engine mounts

Anthony P
 

Yes, thrust line is a real thing. Just as real as a 5" longitudinal C.G. envelope

It needs to intersect the center of pressure (or center of drag as some may call it) at just the right place or be counter acted by lift (plus or minus) via an elevator.  Reflexor as well in our case.

One of the many nice things about the high and low wing tandem-wing aircraft is that the engine is or can be between the two drag producing things (wings).  I guess this is true for high and low wing bi-planes as well.

I think C-182 pilots know about the miss-alignment of the thrust line and the center of pressure.  If it's trimmed for level cruise and you take away all of the throttle, the nose comes up hard and it take a lot of forward force on the yoke to keep it level.
I learned/felt this in an Aeronca Sedan (O-360) for sure.  Giant, draggy wing way up high with a constant speed prop.


--
Q2 N86KL


Re: Q2/200 Engine mounts

Bruce Crain
 

With the Seawind 3000, is “thrust line” really a thing?  Isn’t it really a way to get the engine to fit the cowl?





On Feb 10, 2022, at 11:32 AM, smeshno1@... wrote:


 Now I am curious now to see where my Crank C/L will end up, close to or not the Q-200 and your 3300. Having the C/L of the 3300 that close certainly makes anyone looking at an O-200 replacement seriously consider the swap! Time to get out the measuring stick.. 

 Is your engine rotation a factor in your placement of the NACA? By that I ask..the leading blade propeller blast or are you looking more for installation ease?  In my case the rotation is clockwise looking from the front..the remote cooler usually is on the Pilots side firewall so the NACA for ease of installation would be on the lower Pilots side cowling. Better for airflow is the Port side lower cowl area! The cowling would be blanking the more effective air blast on the ramp if the NACA was in place for ease of installation.    

 Considering the oil cooler. My plan is using my firewall mounted remote oil cooler (which is required on my engine) as the Winter interior heat source rather than risking an exhaust exposure as I had opportunity to "enjoy" in flight several times with the Cessna's I've owned. Still plan to keep the monoxide indicator.   

 Exactly the same in mind about drag reduction. 

 The NACA will have to be sized to be effective but going larger than required and adding a cowl flap feature would resolve my concerns. As you know here in the Midwest the temps become rather oppressive in Summer, and in extended climb and possibly waiting on the runup ramp in Summer as I mentioned, I'm expecting to have some higher than preferred oil temps. That is why I am designing a NACA + inlet cowl flap design.  

 Of course Winter ops demand the oil temps to remain in the green as well, even in extended decents. Head temps I have no concern about.. the oil temps are another story. I had issues here in my O-200 powered 150 on extended climbs.. it was not at all entertaining watching the oil temp needle climb ever closer to the redline in Summer, especially knowing the valve guides tend to get coked oil in those conditions. Next problem from that..stuck valve!!  So the only solution was to step climb which is not the best option other than over open countryside.    

 I'll be installing an Ellison TB..a new one from the authorized dealer. Decided against the Marvel simply because the economics of rebuild is not there anymore and the Ellison is already a proven unit for the engine. I will stay with gravity feed from the header..twin low pressure faucet pumps (one backup, one active) to pump forward from the main, same as Charlie Johnson has.    


 Best regards, Vern

From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Jay Scheevel <jay@...>
Sent: Thursday, February 10, 2022 11:35 AM
To: main@Q-List.groups.io <main@Q-List.groups.io>
Subject: Re: [Q-List] Q2/200 Engine mounts
 

Hi Vern,

 

I got the thrust line on the 3300 pretty close (+/- 0.2”) to that of the O200. I was able to use my original Q-200 cowling halves with not too much alteration, other than the self-inflicted issue of building the radiator ducts. Sometime down the road, I will probably slice off the forward scoop that was used for the carb intake on the O200 and serves as the oil cooler intake on my engine. I can clean up the drag by doing this, so it is on my list for down the road. Won’t affect the oil cooler, since I will install a NACA duct on the bottom of the cowl, which actually will be better for cooling during climbout.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of smeshno1@...
Sent: Thursday, February 10, 2022 9:34 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Q2/200 Engine mounts

 

 Just curious Jay.. was your 3300 also at the O-200 thrust line or did that change? I know for sure on my engine choice 

the supplied cowling is not a useful item. I will be hinging in 4 sections. 2 up and 2 down.  Different materials and 

construction process.  

 

Vern 


From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Jay Scheevel <jay@...>
Sent: Wednesday, February 9, 2022 10:14 PM
To: main@q-list.groups.io <main@q-list.groups.io>
Subject: Re: [Q-List] Q2/200 Engine mounts

 

I computed the vertical position of my empty CG when I was doing my weigh and balance by changing the angle of the fuselage from zero and recording the difference in scales and FS’s, then computed the vertical CG from those. I will see if I can dig that up. I also did a measurement of the difference between the thrust line of the Revmaster and the O200. They are not the same. Will see if I can find that also. 

 

Cheers,

Jay



On Feb 9, 2022, at 9:03 PM, Ian Ashdown <ian.ashdown@...> wrote:

I don’t believe the design O-200 thrust line is WL 15” but the only dimensional reference I’ve found states that it is 7.6” (I think) from the top of the firewall.  Don’t you love the use of consistent datum’s!  My question is, is that the firewall panel (inside of the Fuse) or the outside of the fuse at the FS 14” (firewall)?

Very confusing/frustrating!

Ian
SoCal


Reminder! Saturday's Q-Tour - Matthew Curcio's Well Traveled Q-200 February 12 - 10:00 Central Time

Sam Hoskins
 

Please note the time, it is a little different.  It should be a really interesting presentation.

This month's Q-Tour features Matthew Curcio.  I met Matthew at Oshkosh a few years ago. He was living in Ohio and had just acquired a Q-200. He got the plane up and running and got a job at Scaled Composites. Since then, he has flown in each of the lower 48 states and also to Barrow, Alaska. He made several modifications to turn his Q-200 into a real long distance plane. This will be a really interesting Q-tour, be sure to join us. 

Sam Hoskins is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://us04web.zoom.us/j/74483660582?pwd=Hz8O3XihCBUy-wqi5R654OmwkZjpKK.1

Meeting ID: 744 8366 0582
Passcode: TZ09hX


Empty Aircraft WL of the CG (Tri-Q2 N8WQ)

Jay Scheevel
 

Hi Ian,

 

I found the worksheet where I computed the WL of the CG for my empty A/C. My empty CG’s WL is 11.3”. Pilot and fuel were not measured but these loads are mostly higher than this WL in my plane, so the flying airplane CG will be a bit higher and obviously more aft.

 

_._,_._,_


Re: Q2/200 Engine mounts

Frankenbird Vern
 

 Now I am curious now to see where my Crank C/L will end up, close to or not the Q-200 and your 3300. Having the C/L of the 3300 that close certainly makes anyone looking at an O-200 replacement seriously consider the swap! Time to get out the measuring stick.. 

 Is your engine rotation a factor in your placement of the NACA? By that I ask..the leading blade propeller blast or are you looking more for installation ease?  In my case the rotation is clockwise looking from the front..the remote cooler usually is on the Pilots side firewall so the NACA for ease of installation would be on the lower Pilots side cowling. Better for airflow is the Port side lower cowl area! The cowling would be blanking the more effective air blast on the ramp if the NACA was in place for ease of installation.    

 Considering the oil cooler. My plan is using my firewall mounted remote oil cooler (which is required on my engine) as the Winter interior heat source rather than risking an exhaust exposure as I had opportunity to "enjoy" in flight several times with the Cessna's I've owned. Still plan to keep the monoxide indicator.   

 Exactly the same in mind about drag reduction. 

 The NACA will have to be sized to be effective but going larger than required and adding a cowl flap feature would resolve my concerns. As you know here in the Midwest the temps become rather oppressive in Summer, and in extended climb and possibly waiting on the runup ramp in Summer as I mentioned, I'm expecting to have some higher than preferred oil temps. That is why I am designing a NACA + inlet cowl flap design.  

 Of course Winter ops demand the oil temps to remain in the green as well, even in extended decents. Head temps I have no concern about.. the oil temps are another story. I had issues here in my O-200 powered 150 on extended climbs.. it was not at all entertaining watching the oil temp needle climb ever closer to the redline in Summer, especially knowing the valve guides tend to get coked oil in those conditions. Next problem from that..stuck valve!!  So the only solution was to step climb which is not the best option other than over open countryside.    

 I'll be installing an Ellison TB..a new one from the authorized dealer. Decided against the Marvel simply because the economics of rebuild is not there anymore and the Ellison is already a proven unit for the engine. I will stay with gravity feed from the header..twin low pressure faucet pumps (one backup, one active) to pump forward from the main, same as Charlie Johnson has.    


 Best regards, Vern


From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Jay Scheevel <jay@...>
Sent: Thursday, February 10, 2022 11:35 AM
To: main@Q-List.groups.io <main@Q-List.groups.io>
Subject: Re: [Q-List] Q2/200 Engine mounts
 

Hi Vern,

 

I got the thrust line on the 3300 pretty close (+/- 0.2”) to that of the O200. I was able to use my original Q-200 cowling halves with not too much alteration, other than the self-inflicted issue of building the radiator ducts. Sometime down the road, I will probably slice off the forward scoop that was used for the carb intake on the O200 and serves as the oil cooler intake on my engine. I can clean up the drag by doing this, so it is on my list for down the road. Won’t affect the oil cooler, since I will install a NACA duct on the bottom of the cowl, which actually will be better for cooling during climbout.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of smeshno1@...
Sent: Thursday, February 10, 2022 9:34 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Q2/200 Engine mounts

 

 Just curious Jay.. was your 3300 also at the O-200 thrust line or did that change? I know for sure on my engine choice 

the supplied cowling is not a useful item. I will be hinging in 4 sections. 2 up and 2 down.  Different materials and 

construction process.  

 

Vern 


From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Jay Scheevel <jay@...>
Sent: Wednesday, February 9, 2022 10:14 PM
To: main@q-list.groups.io <main@q-list.groups.io>
Subject: Re: [Q-List] Q2/200 Engine mounts

 

I computed the vertical position of my empty CG when I was doing my weigh and balance by changing the angle of the fuselage from zero and recording the difference in scales and FS’s, then computed the vertical CG from those. I will see if I can dig that up. I also did a measurement of the difference between the thrust line of the Revmaster and the O200. They are not the same. Will see if I can find that also. 

 

Cheers,

Jay



On Feb 9, 2022, at 9:03 PM, Ian Ashdown <ian.ashdown@...> wrote:

I don’t believe the design O-200 thrust line is WL 15” but the only dimensional reference I’ve found states that it is 7.6” (I think) from the top of the firewall.  Don’t you love the use of consistent datum’s!  My question is, is that the firewall panel (inside of the Fuse) or the outside of the fuse at the FS 14” (firewall)?

Very confusing/frustrating!

Ian
SoCal


Re: Q2/200 Engine mounts

Jay Scheevel
 

Hi Ian,

 

You can do what you are describing, but simply removing the line items that I have in there for my gear and replacing with appropriate weight and moment entries for the standard wingtip gear and fairings. The rest is the same or similar to the standard Q-200.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Ian Ashdown
Sent: Thursday, February 10, 2022 9:35 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Q2/200 Engine mounts

 

Jay,

Thank you for sharing your spreadsheet.  It’s the best data source I have so far.  I was hoping to do the same, but in CAD.  It turns out that may be more difficult than I thought as a good percentage of this is not original design, so the material properties would have to be fudged.  At this point I think the spreadsheet will be the best approach.  What I was hoping for is the data for a standard Q200.  I could then back out certain components and add back the ones I’ll be using.

The last time I did this, it was with a race car, the prediction was within 0.5% of the as build car.

Ian


Re: Q2/200 Engine mounts

Jay Scheevel
 

Hi Vern,

 

I got the thrust line on the 3300 pretty close (+/- 0.2”) to that of the O200. I was able to use my original Q-200 cowling halves with not too much alteration, other than the self-inflicted issue of building the radiator ducts. Sometime down the road, I will probably slice off the forward scoop that was used for the carb intake on the O200 and serves as the oil cooler intake on my engine. I can clean up the drag by doing this, so it is on my list for down the road. Won’t affect the oil cooler, since I will install a NACA duct on the bottom of the cowl, which actually will be better for cooling during climbout.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of smeshno1@...
Sent: Thursday, February 10, 2022 9:34 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Q2/200 Engine mounts

 

 Just curious Jay.. was your 3300 also at the O-200 thrust line or did that change? I know for sure on my engine choice 

the supplied cowling is not a useful item. I will be hinging in 4 sections. 2 up and 2 down.  Different materials and 

construction process.  

 

Vern 


From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Jay Scheevel <jay@...>
Sent: Wednesday, February 9, 2022 10:14 PM
To: main@q-list.groups.io <main@q-list.groups.io>
Subject: Re: [Q-List] Q2/200 Engine mounts

 

I computed the vertical position of my empty CG when I was doing my weigh and balance by changing the angle of the fuselage from zero and recording the difference in scales and FS’s, then computed the vertical CG from those. I will see if I can dig that up. I also did a measurement of the difference between the thrust line of the Revmaster and the O200. They are not the same. Will see if I can find that also. 

 

Cheers,

Jay



On Feb 9, 2022, at 9:03 PM, Ian Ashdown <ian.ashdown@...> wrote:

I don’t believe the design O-200 thrust line is WL 15” but the only dimensional reference I’ve found states that it is 7.6” (I think) from the top of the firewall.  Don’t you love the use of consistent datum’s!  My question is, is that the firewall panel (inside of the Fuse) or the outside of the fuse at the FS 14” (firewall)?

Very confusing/frustrating!

Ian
SoCal


Re: Q2/200 Engine mounts

Ian Ashdown
 

Hi Anthony,

I think you are correct, the stock Rotax silencer will have to go!  From the perspective of ear comfort during flight I had thought to keep it.  I don’t think it’s a tuned exhaust so going to open pipes shouldn’t be a problem.  On the other hand I think it might be possible to make/buy some small, light, in line silencers that could package alongside the fuselage, in the airstream, that would take the edge off the noise.  

Knowing that the big silencer box is gone allows me to move forwards knowing that there is a solution, but I’ll deal with that another day!

Ian
SoCal


Re: Q2/200 Engine mounts

Ian Ashdown
 

Jay,

Thank you for sharing your spreadsheet.  It’s the best data source I have so far.  I was hoping to do the same, but in CAD.  It turns out that may be more difficult than I thought as a good percentage of this is not original design, so the material properties would have to be fudged.  At this point I think the spreadsheet will be the best approach.  What I was hoping for is the data for a standard Q200.  I could then back out certain components and add back the ones I’ll be using.

The last time I did this, it was with a race car, the prediction was within 0.5% of the as build car.

Ian


Re: Q2/200 Engine mounts

Frankenbird Vern
 

 Just curious Jay.. was your 3300 also at the O-200 thrust line or did that change? I know for sure on my engine choice 
the supplied cowling is not a useful item. I will be hinging in 4 sections. 2 up and 2 down.  Different materials and 
construction process.  

Vern 


From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Jay Scheevel <jay@...>
Sent: Wednesday, February 9, 2022 10:14 PM
To: main@q-list.groups.io <main@q-list.groups.io>
Subject: Re: [Q-List] Q2/200 Engine mounts
 
I computed the vertical position of my empty CG when I was doing my weigh and balance by changing the angle of the fuselage from zero and recording the difference in scales and FS’s, then computed the vertical CG from those. I will see if I can dig that up. I also did a measurement of the difference between the thrust line of the Revmaster and the O200. They are not the same. Will see if I can find that also. 

Cheers,
Jay


On Feb 9, 2022, at 9:03 PM, Ian Ashdown <ian.ashdown@...> wrote:

I don’t believe the design O-200 thrust line is WL 15” but the only dimensional reference I’ve found states that it is 7.6” (I think) from the top of the firewall.  Don’t you love the use of consistent datum’s!  My question is, is that the firewall panel (inside of the Fuse) or the outside of the fuse at the FS 14” (firewall)?

Very confusing/frustrating!

Ian
SoCal

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