Date   

Re: Thermocouple compatible bulkhead connector?

John Loram <johnl@...>
 

Hi Rick:
When you splice a connector into a thermocouple wire, you actually create
two junctions (the point I missed ): one junction is created where the
thermocouple wire is attached to the plug side of the connector, and a
second junction is create where you connect the thermocouple wire to the
socket side of the connector. These two junctions are of opposite polarity,
so, if the two junctions are at the same temperature (as they would be since
they are plugged into one another) they electrically balance out one another
and will have no effect on the temperature measurement.

building like crazy, -john-
www.loram.org




_____

From: Q-LIST@yahoogroups.com [mailto:Q-LIST@yahoogroups.com] On Behalf Of
Rick
Sent: Thursday, February 04, 2010 3:11 PM
To: Q-LIST@yahoogroups.com
Subject: [Q-LIST] Re: Thermocouple compatible bulkhead connector?




I was curious about this as in theory the additional dissimilar metal
junction will cause errors in the readings. As an experiment I tried
connecting a type K thermocouple to a digital thermometer readout with a
length of copper wire spliced in. With the thermocouple immersed in a hot
oil bath I watched the temperature displayed as I used a hot air gun to heat
the junction of copper to thermocouple wire. I thought I could see 1-2
degrees change heating the junction from ambient to as hot as the gun would
deliver, but it was difficult to tell the change from random drift.

I have forgotten if I repeated the experiment with a type J thermocouple.
The metals involved are different and I would not assume the same results
without testing.

So my conclusion is, for type K as used in EGT probes and often used for
CHT, you can use the non-thermocouple connector or even use copper extension
wire without significant error. And as long as all the cylinder's wires are
the same temperature at the change of metal, all the errors are the same
magnitude and direction, so with EGTs where only the trend is important, you
are doubly ok.

Rick Hole

--- In Q-LIST@yahoogroups. <mailto:Q-LIST%40yahoogroups.com> com, "John
Loram" <johnl@...> wrote:

Thanks for that Sam. Your comment forced me to rethink the problem and I
realized that I had not considered that I was running both sides of each
thermocouple leg through the same connector (duh!), and consequently, the
effect of the dissimilar metals of the connector would be cancelled out so
long as both the male and the female pins of the connector are the same
material.

Cool! thanks again, -john-


Re: Thermocouple compatible bulkhead connector?

Rick Hole
 

I was curious about this as in theory the additional dissimilar metal junction will cause errors in the readings. As an experiment I tried connecting a type K thermocouple to a digital thermometer readout with a length of copper wire spliced in. With the thermocouple immersed in a hot oil bath I watched the temperature displayed as I used a hot air gun to heat the junction of copper to thermocouple wire. I thought I could see 1-2 degrees change heating the junction from ambient to as hot as the gun would deliver, but it was difficult to tell the change from random drift.

I have forgotten if I repeated the experiment with a type J thermocouple. The metals involved are different and I would not assume the same results without testing.

So my conclusion is, for type K as used in EGT probes and often used for CHT, you can use the non-thermocouple connector or even use copper extension wire without significant error. And as long as all the cylinder's wires are the same temperature at the change of metal, all the errors are the same magnitude and direction, so with EGTs where only the trend is important, you are doubly ok.

Rick Hole

--- In Q-LIST@yahoogroups.com, "John Loram" <johnl@...> wrote:

Thanks for that Sam. Your comment forced me to rethink the problem and I
realized that I had not considered that I was running both sides of each
thermocouple leg through the same connector (duh!), and consequently, the
effect of the dissimilar metals of the connector would be cancelled out so
long as both the male and the female pins of the connector are the same
material.

Cool! thanks again, -john-


Re: Thermocouple compatible bulkhead connector?

John Loram <johnl@...>
 

Thanks for that Sam. Your comment forced me to rethink the problem and I
realized that I had not considered that I was running both sides of each
thermocouple leg through the same connector (duh!), and consequently, the
effect of the dissimilar metals of the connector would be cancelled out so
long as both the male and the female pins of the connector are the same
material.

Cool! thanks again, -john-

-----Original Message-----
From: Q-LIST@yahoogroups.com [mailto:Q-LIST@yahoogroups.com]
On Behalf Of Sam Hoskins
Sent: Thursday, February 04, 2010 5:40 AM
To: Q-LIST
Subject: Re: [Q-LIST] Thermocouple compatible bulkhead connector?

I just used a metal D-sub connector. Bob Knuckolls said it
was okay to use.

Sam Hoskins


On Wed, Feb 3, 2010 at 4:59 PM, John Loram <johnl@loram.org> wrote:



Does any one know of a source (other than Omega) for multi-pin
bulkhead connectors that are compatible with Type J & K
thermocouples?
I wiring the firewall foreword...

thanks, -john-









------------------------------------

Quickie Builders Association WEB site
http://www.quickiebuilders.org

Yahoo! Groups Links




Epoxy for fuel tanks

Phil Lankford
 

Here is some more on Epoxy for Fuel Tanks posted by Gary Hunter.

Cheers,

Phil Lankford



____________________________________
From: trost.peter@gmail.com
To: britmcman@aol.com
Sent: 2/4/2010 10:51:46 A.M. Pacific Standard Time
Subj: Re: Epoxy for fuel tanks


Phil,

Here is a article that Gary Hunter (the epoxy guru) wrote on epoxies
for fuel tanks.
It is the article I base my current opinion on for epoxies. He
explains exactly his
choice of epoxy. Very good info.

Peter

----------------------------------------------------------------------------
-----------------------------

All the suppliers claim their "structural resins" are suitable for fuel
containment. And, they are - IF - the builder knows how to go about it and
does everything correctly. I have always been adamant about "post curing"
epoxies, especially the fuel tank. You can't buy cheaper insurance.

Safe-T-Poxy I or now EZ-Poxy 87 is probably by far the best in this
category, with or without a post cure. Chemical resistance is one of the
prime attributes of epoxies beyond homebuilding airplanes. They are used
for building fiberglass chemical storage tanks and piping and for lining of
steel tanks to prevent corrosion. In that industry the curing agent "type"
governs the degree of chemical resistance. Aromatic amines are by far the
best known curing agent type for overall chemical resistance - particularly
in fuels, solvents and strong acids. EZ-Poxy 87 is the only aromatic amine
curing agent available to the homebuilt world.

Next in line are "aliphatic amines". The original RAES & RAEF were
"modified" aliphatic amines. However, according to my tests the RAES
without a post cure was absolutely no good for fuel and marginal with. But,
the RAEF without a post cure was marginal and did just fine with a post
cure. Thus, the original Vari-Eze plans mandated RAEF for the fuel tanks.

Next in line are "cycloaliphatic" amines. Aeropoxy, MGS, Proset, and
EZ-Poxy 83 & 84 are "blends of modified aliphatic and cycloaliphatic amine
adducts". Modified - because the straight stuff has bad cure behavior.
Some modifications work out better than others. A prime example is the
Aeropoxy's sensitivity to temperature and moisture. I call these "quirky
cure characteristics". However, even the "quirkiest" of these curing
agents will resist fuel - IF - they are properly applied and fully post
cured.

DO NOT simply brush the resin on the inside surface of the already cured
fuel tank and expect it to cure like a 2 or 4 ply lay-up. This is where the
screen plugging flakes of epoxy come from.

Your original layups for all the inside tank components should be "wet" so
to be certain there are no dry spots, pinholes or voids. This is no place
to be too concerned about weight. Even the BID tapes in the corners should
be nice and wet. Peel ply only were secondary bonds will be needed. For
those of you than like the smooth surface of peel plying - add an extra
final ply of a fine weave light weight fiberglass deck cloth. It will give
you a similar smooth surface without introducing or hiding voids. Warm
shop temperatures and low humidity will reduce the curing agents "quirk"
factor.

There are many ways to obtain a post cure on the tank. Before the tops are
put on, you can use heat lamps to cure the inside surfaces. You can
pre-post cure the inside surface of the top too. After the top is bonded
in place you can post cure these bonds by heating the exterior surface with
heat lamps. The heat will work its way to the bonds.

OR, after the top of the tank is bonded on, you can circulate warm air
through the tank for several hours. I did this with the outlet end of my
vacuum cleaner inserted in to the fuel cap opening. About 140F is
sufficient.

RULE OF THUMB - If you can hold your hand on the surface to the count of 10
- the temperature is 140F or below.

Hope this is helps.

Gary Hunter
EAA Technical Counselor
Vari-Eze N235GH


Re: Thermocouple compatible bulkhead connector?

Jay Scheevel <scheevel@...>
 

Hi John,

I get all my connectors and electronic components from Newark. (Newark.com)

Cheers,
Jay


Re: Thermocouple compatible bulkhead connector?

Sam Hoskins
 

I just used a metal D-sub connector. Bob Knuckolls said it was okay to use.

Sam Hoskins


On Wed, Feb 3, 2010 at 4:59 PM, John Loram <johnl@loram.org> wrote:



Does any one know of a source (other than Omega) for multi-pin bulkhead
connectors that are compatible with Type J & K thermocouples? I wiring the
firewall foreword...

thanks, -john-

[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]


Thermocouple compatible bulkhead connector?

John Loram <johnl@...>
 

Does any one know of a source (other than Omega) for multi-pin bulkhead
connectors that are compatible with Type J & K thermocouples? I wiring the
firewall foreword...

thanks, -john-


Re: Gulf Coast Canard Fly-in Sat. Feb 27, 2010 latest Update

quickheads2 <groups@...>
 

I added this to the QBA website under upcoming events!

http://www.quickheads.com/upcoming-events.html

Cheers,
Dan Yager
QBA Editor
Q-200 under reconstruction
www.quickheads.com


Gulf Coast Canard Fly-in Sat. Feb 27, 2010 latest Update

Brent Bourgeois <bjb3013@...>
 

Some have had the attachment stripped from their mail. I will try once more and include the info in the body of this email.
 
See the Velocity Aircraft web site for training opportunities at the fly in.
 
 
Attached is the latest information on the Gulf Coast Canard Fly-in.
Please let all of your friends know whats going on. Our intent is to make this a similar low key get together as Rough River and an annual event.
If you have any questions or comments please contact:
Brent Bourgeois, bjb3013@yahoo. com, 985-785-8299, Velocity N61VB
Victor Taylor, velocityoner@ yahoo.com, 251-377-5216 Velocity N93DV
 
 

Saturday February 27, 2010     8:00AM 
Trent Lott International,    Pascagoula Mississippi   (KPQL)
ATIS 135.175,  Tower118.575,  Ground 121.725,
Runway 17/35     6500X100
FBO:    US Aviation    228-474-1000 
Rental cars available through FBO and Enterprise
Fuel discounts, Fun and good food
All Canard drivers, builders and wannabes are invited. Drive in; fly in, spam can, other plastic airplanes and all those that can attend are welcome. The more experimental homebuilts of all types the better. Our intention is to make this an annual event. If you think there is the slightest chance that you will be attending please let us know so we can prepare things like food, bathrooms and transportation for everyone.  We expect several equipment vendors and aircraft manufactures to attend Including Velocity Aircraft and B&C Specialties.
Please bring your own tie downs. Be sure to check the weather on the coast, as fog is possible until about 9:00am at this time of year.
Plans call for hotdogs and burgers for lunch and boiled shrimp for dinner. Later in the afternoon we plan to have a hanger talk consisting of Terry Schubert’s Canard Cooling power point and the FAA Fast program.
 Rental cars are available through the FBO and there are several gulf coast casinos located less than 20 minutes from the airport.
We will provide transportation to the following local motels, all located within 1 mile of the airport.
Holiday Inn Express, 228-474-2100
Best Western Flagship, 228-475-5000
Comfort Inn, 228-474-3600
Shular Inn, 228-475-8444
Quality Inn, 228-475-2477
LaQuinta, 228-475-2477
Econo Lodge, 228-475-9820
If you have any questions or comments please contact:
Brent Bourgeois, bjb3013@yahoo. com, 985-785-8299, Velocity N61VB
Victor Taylor, velocityoner@ yahoo.com, 251-377-5216 Velocity N93DV 

 




[Non-text portions of this message have been removed]


Re: 3D model for Q1/Q2

Clive Clapham
 

Hi Pete

How about posting some screen captures or better still some files?

Clive gobxoy@rocketmail.com

--- In Q-LIST@yahoogroups.com, Pete <strangedays@...> wrote:

Yes.
I do.

nikogroup8 wrote:


hello,
does anyone have a advanced 3D model , catia or solidworks? respecting
strictly airfoils , dimensions etc ..
thanks!


q1 drawings

jany77@sbcglobal.net <jany77@...>
 

i have original quickie drawings with all the stuff and more for sale if anyone is interested


Re: 3D model for Q1/Q2

Pete <strangedays@...>
 

Yes.
I do.

nikogroup8 wrote:


hello,
does anyone have a advanced 3D model , catia or solidworks? respecting strictly airfoils , dimensions etc ..
thanks!


3D model for Q1/Q2

nikogroup8
 

hello,
does anyone have a advanced 3D model , catia or solidworks? respecting strictly airfoils , dimensions etc ..
thanks!


Q2/Q200 Vne UK documentation

Clive Clapham
 

Hi you guys

I don't want to get involved in a spat on another list, there seems to be some confusion over what the VNE is?

In the UK the LAA publish such data here's a link, mid page 4.

http://www.lightaircraftassociation.co.uk/engineering/TADs/094%20QUICKIE%20Q2.pdf

I'd be very surprised if the figures were dreamed up, so at least there is a point of reference.

Clive

gobxoy@rocketmail.com


C-85

Jim D <doyle1959@...>
 

I just listed a C-85 starter on ebay if anyone is interested. It was removed from my TriQ N56DW some time ago.
http://tinyurl.com/yc5dh8p

Keepem flying guys.

Jim Doyle


Re: First Flight of the year!

Mike Dwyer <mdwyer@...>
 

That is too cool. Mine would need a kill switch tho for those sensitive times that I don't want my position transmitted.
: )

On 1/31/2010 7:52 PM, Fisher Paul A. wrote:
Hi Mike. There are a lot of options, but I got this one:
http://www.byonics.com/microtrak/mt8000fa.php

I've only been using it for 2 days, but it was really easy to set up. I got the setup instructions from here:
http://www.vansairforce.com/community/showthread.php?t=31660

It's a fun toy, but as you said, you have to have a ham license to use it. But that's no big deal now that the Morse code requirements have been dropped. Now it's just 35 multiple choice questions and a $15 fee for a 10 year license. But with APRS there are no monthly fees!

I'm looking forward to further experimentation!


From: Q-LIST@yahoogroups.com [mailto:Q-LIST@yahoogroups.com] On Behalf Of Mike Dwyer
Sent: Sunday, January 31, 2010 16:23
To: Q-LIST@yahoogroups.com
Subject: Re: [Q-LIST] First Flight of the year!



Good deal Paul! So you use APRS... the track was pretty nice. I like
that you can click on a dot and see your alt and speed. How much does
an APRS setup cost these days assuming a person already has a Ham
license? You think APRS works all over the US? Any complications that
we are not aware of?
73 de N3QP.
Mike Q200



Re: First Flight of the year!

Fisher Paul A. <fisherpaula@...>
 

Hi Mike. There are a lot of options, but I got this one:
http://www.byonics.com/microtrak/mt8000fa.php

I've only been using it for 2 days, but it was really easy to set up. I got the setup instructions from here:
http://www.vansairforce.com/community/showthread.php?t=31660

It's a fun toy, but as you said, you have to have a ham license to use it. But that's no big deal now that the Morse code requirements have been dropped. Now it's just 35 multiple choice questions and a $15 fee for a 10 year license. But with APRS there are no monthly fees!

I'm looking forward to further experimentation!


From: Q-LIST@yahoogroups.com [mailto:Q-LIST@yahoogroups.com] On Behalf Of Mike Dwyer
Sent: Sunday, January 31, 2010 16:23
To: Q-LIST@yahoogroups.com
Subject: Re: [Q-LIST] First Flight of the year!



Good deal Paul! So you use APRS... the track was pretty nice. I like
that you can click on a dot and see your alt and speed. How much does
an APRS setup cost these days assuming a person already has a Ham
license? You think APRS works all over the US? Any complications that
we are not aware of?
73 de N3QP.
Mike Q200


Re: First Flight of the year!

Mike Dwyer <mdwyer@...>
 

Good deal Paul! So you use APRS... the track was pretty nice. I like that you can click on a dot and see your alt and speed. How much does an APRS setup cost these days assuming a person already has a Ham license? You think APRS works all over the US? Any complications that we are not aware of?
73 de N3QP.
Mike Q200

On 1/31/2010 4:55 PM, n17pf wrote:
It took all the way until the end of the month, but I finally got my first flight of 2010 in today. The weather has been terrible - snow, cold, fog, rain... just about everything but VFR! According to my logbook, the Q hadn't been up since 28 November 2009. Pretty sad.

I didn't do anything particularly interesting - see map here:
http://aprs.fi/n18pf

But at least I got to fly and I made my requisite 3 landings (to a full stop), so I should be legal for a while!

Now I feel better about that survey - I really DO have a flying Q-200!!

Paul A. Fisher
Q-200, N17PF



First Flight of the year!

n17pf <fisherpaula@...>
 

It took all the way until the end of the month, but I finally got my first flight of 2010 in today. The weather has been terrible - snow, cold, fog, rain... just about everything but VFR! According to my logbook, the Q hadn't been up since 28 November 2009. Pretty sad.

I didn't do anything particularly interesting - see map here:
http://aprs.fi/n18pf

But at least I got to fly and I made my requisite 3 landings (to a full stop), so I should be legal for a while!

Now I feel better about that survey - I really DO have a flying Q-200!!

Paul A. Fisher
Q-200, N17PF


JC Propeller Program SW Uploaded shots to "Gobxoy" album

Clive Clapham
 

Hi again you guys

I also added a couple of screen shots of a 3D (well two blades and a hub in loose formation) to GOBXOY ALBUM.

The JC Propeller program does all the hard work and give a slot of scope to play around as well.

I've used quite thin air-foils as when I get round to construction its mostly going to be carbon and a little wood.

Brilliant program IMHO.

Just got to figure out how to construct the hub, it's all in some new language. (SW)

Clive gobxoy

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