Date   

Re: Elevator pitch trim installed and tested

Jay Scheevel
 

Hi Richard,

 

I flew for 15 months without this and had no problems. I just decided to put one in after I started loading my plane more aft and wanted to see over the nose when landing (and not bounce the tail on the runway). My rear wing has 1.5 degrees nose down relative to plans, so it already tends to fly tail low when slow. You should not need additional trim if you have the reflexor installed. I had no problem getting mine trimmed for landing with just the reflexor. My trim routine is more complicated now, but I don’t think you want to complicate things on your first flights.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Richard Thomson
Sent: Tuesday, March 17, 2020 3:01 PM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Elevator pitch trim installed and tested

 

I thought you suggested I didnt need an elevator trim ? :-0

On 17/03/2020 17:21, Jay Scheevel wrote:

Thanks David!  I almost knew that I would hear from you first. 😊  I take your quick response to be a compliment…of sorts. I was limited with respect to space, so the compler-kation factor went up to accommodate. Thanks for your comments.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of David J. Gall
Sent: Tuesday, March 17, 2020 11:04 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Elevator pitch trim installed and tested

 

Jay,

I’m laughing out loud as I’m writing this: Did you previously design suspension systems for the BMW motorcar company? That’s the most compler-kated way I could imagine to do that — and yet, it precisely meets requirements. Amazing! 😉

Keep your spring forces as light as possible — it sounds like you’re already there — and keep your spring rates as low as possible by using the longest springs that’ll fit — again, it looks like you’re already there. So, bravo on getting the important variables dialed in, but your overkill factor is ... large. 🤷😂

Keep up the good work!


Re: Elevator pitch trim installed and tested

Richard Thomson
 

I thought you suggested I didnt need an elevator trim ? :-0

On 17/03/2020 17:21, Jay Scheevel wrote:

Thanks David!  I almost knew that I would hear from you first. 😊  I take your quick response to be a compliment…of sorts. I was limited with respect to space, so the compler-kation factor went up to accommodate. Thanks for your comments.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of David J. Gall
Sent: Tuesday, March 17, 2020 11:04 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Elevator pitch trim installed and tested

 

Jay,

I’m laughing out loud as I’m writing this: Did you previously design suspension systems for the BMW motorcar company? That’s the most compler-kated way I could imagine to do that — and yet, it precisely meets requirements. Amazing! 😉

Keep your spring forces as light as possible — it sounds like you’re already there — and keep your spring rates as low as possible by using the longest springs that’ll fit — again, it looks like you’re already there. So, bravo on getting the important variables dialed in, but your overkill factor is ... large. 🤷😂

Keep up the good work!


Re: Sparrow strainer stall

Jon Finley
 
Edited

Come to think of it, didn't the Wadelow canard work by making the air flow backwards on the bottom of the airfoil and then wrap around the nose to flow over the top surface a second time?? :-)


Re: Sparrow strainer stall

Jon Finley
 

Sorry Bruce... I just saw this.

It's hard to see from the photo - are the tufts on the canard also stalled??

Jon


Couple new videos (non-Q)

Jon Finley
 

Couple new videos for ya'll.

My poor production skills remain but the flying is so very much fun!!!

 

https://youtu.be/Bcho2YTkNnk

 
https://youtu.be/-abd2JIlxeY

Jon


Re: Elevator pitch trim installed and tested

Jay Scheevel
 

Thanks David!  I almost knew that I would hear from you first. 😊  I take your quick response to be a compliment…of sorts. I was limited with respect to space, so the compler-kation factor went up to accommodate. Thanks for your comments.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of David J. Gall
Sent: Tuesday, March 17, 2020 11:04 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] Elevator pitch trim installed and tested

 

Jay,

I’m laughing out loud as I’m writing this: Did you previously design suspension systems for the BMW motorcar company? That’s the most compler-kated way I could imagine to do that — and yet, it precisely meets requirements. Amazing! 😉

Keep your spring forces as light as possible — it sounds like you’re already there — and keep your spring rates as low as possible by using the longest springs that’ll fit — again, it looks like you’re already there. So, bravo on getting the important variables dialed in, but your overkill factor is ... large. 🤷😂

Keep up the good work!


Re: Elevator pitch trim installed and tested

David J. Gall
 

Jay,

I’m laughing out loud as I’m writing this: Did you previously design suspension systems for the BMW motorcar company? That’s the most compler-kated way I could imagine to do that — and yet, it precisely meets requirements. Amazing! 😉

Keep your spring forces as light as possible — it sounds like you’re already there — and keep your spring rates as low as possible by using the longest springs that’ll fit — again, it looks like you’re already there. So, bravo on getting the important variables dialed in, but your overkill factor is ... large. 🤷‍♂️ 😂

Keep up the good work!


Elevator pitch trim installed and tested

Jay Scheevel
 

Hi All,

 

Did a little “social distancing” on Sunday to test my newly installed elevator pitch trim system in flight.  

 

I have limited vertical clearance under my oversized header tank, so the plans version of elevator trim was not an option. As you have all come to expect from me, I designed my own version.

 

General description: it consists of two stacked rail systems. The lower rail has a carriage that slides fore and aft in a steel track that is anchored to the top skin of the canard and is driven by a linear servo which is anchored to the firewall. Attached “piggy back” on the top of that carriage is another rail with its own a carriage that is centered/floating between two fixed springs. This upper carriage has a rod-end/push-rod assembly that reaches back to the ear on the elevator torque tube assembly, attaching just above the push-rod coming forward from the stick. 

 

Clear as mud?  Here are a couple of pictures of the assembly (not installed in the plane yet). The yellow nylon carriage slides into the rail mounted to the canard. The servo attaches into the  hole left of center in the aluminum fixture on top of the yellow carriage. The bottom rail has already been installed in the aircraft at this point.  Next, the upper carriage assembly “floats” between the two springs and slides along the aluminum track that is rivetted to the upper C-rail. The lower carriage, driven by the servo, determines how far fore or aft the floating spring assembly is to the elevator torque ear.

 

After much ground testing followed by test flying, I can report that it works as designed. The springs may be a little on the weak side, but I can change those out or augment them later. The design allows me to swap them out easily. For now, I will fly it as is. By putting in full nose-up setting on this elevator trim, I get about 3/8” down elevator and use neutral reflexor for a 90 mph final approach with neutral stick force. Using this setting visibility over the nose is much improved. Previously I had quite a bit of aileron reflexed up (nose-up) to get the same approach speed and I had noticeably higher in pitch and reduce visibility.

 

I take off with a little bit of aileron reflexed up and this new elevator trim set to neutral. I will be experimenting some more to see what combinations are required for various cg’s. Overall, I am pleased with this addition to my control system.

 

Cheers,

Jay

 


Re: Rotax 912? Will this engine work?

Gary McKirdy
 


On Sun, 15 Mar 2020, 17:50 Gary McKirdy via Groups.Io, <gary.mckirdy21=gmail.com@groups.io> wrote:
Hi Bruce, 
There is an Ex Swissair engineer in Switzerland who did that.
His name is Rudy Brandenberg.
I've lost his details.
Not sure his has flown yet.
Try tracking him down for info.
Regards
Gary

On Sun, 15 Mar 2020, 17:46 Bruce Mayfield via Groups.Io, <meachamlake=yahoo.com@groups.io> wrote:
Have acquired a Rotax 912 ul 80 HP.   Are there any motor mount or cowl mods information.  Will put in a Q2.
Thanks
Bruce


Re: Rotax 912? Will this engine work?

Gary McKirdy
 

Hi Bruce, 
There is an Ex Swissair engineer in Switzerland who did that.
His name is Rudy Brandenberg.
I've lost his details.
Not sure his has flown yet.
Try tracking him down for info.
Regards
Gary


On Sun, 15 Mar 2020, 17:46 Bruce Mayfield via Groups.Io, <meachamlake=yahoo.com@groups.io> wrote:
Have acquired a Rotax 912 ul 80 HP.   Are there any motor mount or cowl mods information.  Will put in a Q2.
Thanks
Bruce


Rotax 912? Will this engine work?

Bruce Mayfield <meachamlake@...>
 

Have acquired a Rotax 912 ul 80 HP.   Are there any motor mount or cowl mods information.  Will put in a Q2.
Thanks
Bruce


Re: RF noise reduction

Corbin <c_geiser@...>
 

I tried 2-3 of the ferrites and, unfortunately, it didn't make a difference at all.

Corbin

On March 13, 2020 at 3:11 PM, Richard Thomson <richard@...> wrote:

    Thanks Jay, it reminded me I have some clip on ferrites I can try on my lines to get the buzz sorted. :-)

    RichT

On 12/03/2020 18:29, Jay Scheevel wrote:

Hi All,

 

Found this outfit that makes materials and provides insight for RF noise reduction. Have a look if you are having problems that might need to be addressed.

 

Cheers,

Jay

https://kf7p.com/KF7P/RF_chokes.html

 




--

Corbin 
N33QR


Re: RF noise reduction

Richard Thomson
 

    Thanks Jay, it reminded me I have some clip on ferrites I can try on my lines to get the buzz sorted. :-)

    RichT

On 12/03/2020 18:29, Jay Scheevel wrote:

Hi All,

 

Found this outfit that makes materials and provides insight for RF noise reduction. Have a look if you are having problems that might need to be addressed.

 

Cheers,

Jay

https://kf7p.com/KF7P/RF_chokes.html

 


Re: TriQ N8WQ climb performance

Jay Scheevel
 

That is why I plotted climb rate vs. density altitude. I have an EFIS that gives me a constant readout of density altitude.

 

Cheers,
Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Peter Le Lievre
Sent: Friday, March 13, 2020 10:21 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] TriQ N8WQ climb performance

 

Service ceiling also needs to factor the density altitude(DA). Standard pressure/temperature is needed. At 14K this is 9F.
If a -20F cold day (we are winter now) then you will climb higher. Not possible in summer (+20F). 

Unless you are turbocharged, and even then the critical altitude of most turbos becomes a significant factor in the teens. However N/A engines are affected greatly by changes in DA.


Re: TriQ N8WQ climb performance

Peter Le Lievre <peter@...>
 

Service ceiling also needs to factor the density altitude(DA). Standard pressure/temperature is needed. At 14K this is 9F.
If a -20F cold day (we are winter now) then you will climb higher. Not possible in summer (+20F). 

Unless you are turbocharged, and even then the critical altitude of most turbos becomes a significant factor in the teens. However N/A engines are affected greatly by changes in DA.


RF noise reduction

Jay Scheevel
 

Hi All,

 

Found this outfit that makes materials and provides insight for RF noise reduction. Have a look if you are having problems that might need to be addressed.

 

Cheers,

Jay

https://kf7p.com/KF7P/RF_chokes.html

 


Re: TriQ N8WQ climb performance

Robert Cringely
 

That's not your service ceiling, it is your absolute ceiling. The service ceiling is just over 14,000 feet where you are still climbing at 100 fpm (the definition of service ceiling).


On Thu, Mar 12, 2020 at 9:50 AM Jay Scheevel <jay@...> wrote:

No Jerry. I am putting in pressurization to 20 psi!  😊

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Jerry Marstall
Sent: Thursday, March 12, 2020 10:19 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] TriQ N8WQ climb performance

 

Excellent. Next purchase a space suit?

 

-------- Original message --------

From: Jay Scheevel <jay@...>

Date: 3/12/20 11:43 AM (GMT-05:00)

Subject: [Q-List] TriQ N8WQ climb performance

 

Hi All,

 

I think I have enough flights to establish my DA service ceiling (16000’) at “average” operating weights.  I have yet to push my GW to the max of 1200 lb., but will get there eventually.  Here is my chart at Vy for your consideration.

 

Cheers,

Jay N8WQ, 84 hours

 


Re: TriQ N8WQ climb performance

Jay Scheevel
 

No Jerry. I am putting in pressurization to 20 psi!  😊

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Jerry Marstall
Sent: Thursday, March 12, 2020 10:19 AM
To: main@Q-List.groups.io
Subject: Re: [Q-List] TriQ N8WQ climb performance

 

Excellent. Next purchase a space suit?

 

-------- Original message --------

From: Jay Scheevel <jay@...>

Date: 3/12/20 11:43 AM (GMT-05:00)

Subject: [Q-List] TriQ N8WQ climb performance

 

Hi All,

 

I think I have enough flights to establish my DA service ceiling (16000’) at “average” operating weights.  I have yet to push my GW to the max of 1200 lb., but will get there eventually.  Here is my chart at Vy for your consideration.

 

Cheers,

Jay N8WQ, 84 hours

 


Re: TriQ N8WQ climb performance

Jerry Marstall <jnmarstall@...>
 

Excellent. Next purchase a space suit?

-------- Original message --------
From: Jay Scheevel <jay@...>
Date: 3/12/20 11:43 AM (GMT-05:00)
To: Q-List@groups.io
Subject: [Q-List] TriQ N8WQ climb performance

Hi All,

 

I think I have enough flights to establish my DA service ceiling (16000’) at “average” operating weights.  I have yet to push my GW to the max of 1200 lb., but will get there eventually.  Here is my chart at Vy for your consideration.

 

Cheers,

Jay N8WQ, 84 hours

 


TriQ N8WQ climb performance

Jay Scheevel
 

Hi All,

 

I think I have enough flights to establish my DA service ceiling (16000’) at “average” operating weights.  I have yet to push my GW to the max of 1200 lb., but will get there eventually.  Here is my chart at Vy for your consideration.

 

Cheers,

Jay N8WQ, 84 hours