David J. Beaulieu
  • Bangor, ME
  • United States
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David J. Beaulieu's Friends

  • Werner Fourie
  • Jacob Bragg
  • Andrew Gaut
  • Bob Widmer
  • Paul Henry Davis
  • Matt Crosby
  • Joshua Bardell
  • Jeremy Cowgar
  • Nelson Orta
  • John Waldrip
  • Michael McKeon
  • Peter Torkelson
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David J. Beaulieu's Discussions

FYI...Throttle Position Sensor (TPS)

Started Jan 14 0 Replies

For those of us with older engines and black box ECUs...The TPS is a mechanical rheostat style unit which outputs a voltage signal to the ECU corresponding to throttle position.  It seems that over…Continue

Cylinder head woe!!

Started this discussion. Last reply by David J. Beaulieu Oct 6, 2021. 9 Replies

Submitted for you reading pleasure...Been having gradually increasing CHT on my #4 cylinder over the past two weeks.  Last flight resulted in a immediate return to the airport at minimum throttle to…Continue

Ray Allen POS-12 wiring Found my answer

Started this discussion. Last reply by David J. Beaulieu Oct 26, 2021. 4 Replies

I have the POS-12 laying around so thought I would fabricate mount and linkage to have the position sensor give my Dynon setup a signal for flap position.  The POS-12 is simply a 0-5K resistor pot. …Continue

New Service Bulletin 2021-02

Started this discussion. Last reply by David R Ferrell May 31, 2021. 2 Replies

Relates to the throttle position sensorContinue

 

David J. Beaulieu's Page

Latest Activity

David J. Beaulieu posted a discussion

FYI...Throttle Position Sensor (TPS)

For those of us with older engines and black box ECUs...The TPS is a mechanical rheostat style unit which outputs a voltage signal to the ECU corresponding to throttle position.  It seems that over time the mechanism can develop wear in certain positions (likely from frequent range of use or vibration related to throttle cable routing and attachment to throttle body.)  This can result in a bit of stumble or hesitation in the engine with throttle movement depending on "where" the wear has…See More
Jan 14
David J. Beaulieu posted a photo

Winter on the way?

Got the snowblower out of the hangar, winterized the floats and put the insulated cowl cover and heater to Sky Turtle. Still feels more like late October weather - just barely below freezing at night and 40s -50s during the day. We better get some…
Nov 16, 2021
David J. Beaulieu posted a photo

At KCAR

Quick overnight from Bangor to Caribou to visit my brother. Usually about a 3 1/2 hr drive. Flying direct got me there in 1.7 hrs
Nov 12, 2021
David J. Beaulieu posted a photo

Floats off

Sky Turtle transitioned back to conventional landing gear last Friday. Feels like a flying rocketship with 50 degree weather, half tanks of gas and no amphibs hanging underneath. Sadly, only a temporary sensation ;)
Oct 24, 2021
A photo by David J. Beaulieu was featured

Fall colors are here...

Fall colors are here...and a lot of glassy water!
Oct 13, 2021
David J. Beaulieu posted a status
"Finally went over 300 hrs on the Hobbs!"
Oct 13, 2021
David J. Beaulieu posted a photo

Sky Turtle flying again

Got the replacement cylinder head installed on Monday and accomplished engine run and test flight on Tuesday. Just in time for some Fall foliage flights on floats...yahoo!
Oct 6, 2021
Bob Widmer left a comment for David J. Beaulieu
"Morning David I'm just finalizing my order to Advanced Flight Systems (thought I'd use them as it will speed up installation of the Dynon package considerably). I believe I read somewhere that you have a "red box" i.e. a fuel…"
Sep 21, 2021
David J. Beaulieu posted a discussion

Cylinder head woe!!

Submitted for you reading pleasure...Been having gradually increasing CHT on my #4 cylinder over the past two weeks.  Last flight resulted in a immediate return to the airport at minimum throttle to maintain CHT below max limit* (just barely and in a slight descent while setting up for landing.)  *Downside of ECU is that we have no mixture to cool things down with.All this was after trying to isolate/resolve the issue by verifying/troubleshooting probes and a new injector with no improvements…See More
Sep 12, 2021
David J. Beaulieu posted a discussion

Ray Allen POS-12 wiring

I have the POS-12 laying around so thought I would fabricate mount and linkage to have the position sensor give my Dynon setup a signal for flap position.  The POS-12 is simply a 0-5K resistor pot.  I have 5V and ground wires from the Dynon EMS as well as the general purpose input pin/wire ready to wire to the POS-12.  The POS-12 has three wires; white/blue, white/orange, and white/green.  Th white/green is the signal wire.I cannot find which leads of the POS-12 accept the positive and ground…See More
Aug 17, 2021
David J. Beaulieu posted videos
Jul 29, 2021
David J. Beaulieu posted a photo

Sailing the 750

Shutdown on the water trying to "sail" back to a point on the beach. No need due to water/wind conditions but strictly to practice at a skill I need to develop.
Jul 11, 2021
David J. Beaulieu posted photos
Jun 29, 2021
David J. Beaulieu posted a status
"Three water landings and takeoffs today with perfect weather/wind conditions. Got my currency requirement done!"
Jun 18, 2021
David J. Beaulieu posted a photo

float flight

Got the floats installed this week and getting ready for a quick post install test flight now that winds and weather are cooperating.
Jun 17, 2021
Bobby Allen Pepper left a comment for David J. Beaulieu
"David, very impressed with and very interested in purchasing a set of brackets for Dynon auto pilot for my Zenith 750. Already have all except brackets. Please email Allen at apepper72@gmail.com. Thanks. N750AP"
Jun 2, 2021

Profile Information

Aircraft Model
STOL CH 750
Project Status
Flying
Building From
Kit
Engine installed (or plan to install)
UL Power
Building Experience
Have already built an airplane
Flying Experience
Commercial / CFI
Building and Flying Info / Your Profession / Other Background Info
Retired Military Pilot / Engineer by Education / Retired Commercial Pilot

Loving the "Great North Woods" of Maine
Home Airport (ie. KMYJ)
KOLD (Old Town, ME)

David J. Beaulieu's Blog

A Zenith Builder in Ghana

Posted on March 24, 2018 at 9:30pm 3 Comments

Interesting clip regarding a couple of people mentioned within our forum previously...inspiring!

https://www.liveleak.com/view?t=uLUxz_1521935468

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Comment Wall (14 comments)

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At 12:10pm on September 21, 2021, Bob Widmer said…

Morning David

I'm just finalizing my order to Advanced Flight Systems (thought I'd use them as it will speed up installation of the Dynon package considerably).

I believe I read somewhere that you have a "red box" i.e. a fuel flow transducer in your UL engine/Dynon system - as I understand it you need 2 transducers, 1 to the engine and 1 calculating the return flow so the Dynon calculates actual usage.

Anyway, if I install 2 transducers do I need to, or do I want to, install Zenith's fuel gauges in the tanks?

Cheers

Bob

At 6:34pm on June 2, 2021, Bobby Allen Pepper said…

David, very impressed with and very interested in purchasing a set of brackets for Dynon auto pilot for my Zenith 750. Already have all except brackets. Please email Allen at apepper72@gmail.com. Thanks.

N750AP

At 8:31am on October 6, 2020, Nelson Orta said…

Hi David,

Thanks for wanting to share your knowledge with me.

I’m in your same time zone, anytime that is good for you to call me works for me.

Thanks,

Nelson 

(305) 525-7803

At 7:17am on July 5, 2020, Daniel Booker said…

David,

sorry about delay, not good on this Zenith site!  Looking to get a set of Zenair plans to install my floats. Do you have a set I could purchase/copy?  Thanks,

dan

At 3:28pm on December 22, 2018, Wayne Woloshin said…

Hi David, I am curious about your UL Engine , what was the problem that you have to change the #3 Cylinder . And how many hours on your Engine. Tks Wayne 

At 6:01pm on January 10, 2018, Thomas Jackson said…

David, I saw that you are interested in Datum skis. I have been flying with the skis for 4 years and am very satisfied with them. If you have any questions forward them to me and I will be gald to answer the best as possible.

Tom

At 5:45pm on November 28, 2017, Danal Estes said…

David,

You asked what we were seeing with the bad injector.  The above is typical.  #3 cylinder just was "not tracking" with the others. 

Digging a little deeper, it is a bit hotter than others at idle (lean, where everything should be very rich), gets even hotter if the power is up only a tiny bit (even leaner), and actually "goes cold" when the power is advanced anywhere above about 1500 RPM, because it gets so lean it is not burning. Too lean for the plugs to ignite. 

And... we thought this was a bad injector for a long time.  After chasing down similar problems several times, we came to the conclusion the injectors were fine... that the ECU had an inadequate ground.  

Conclusions:

First, check that all EGTs and CHTs "Track" each other in ALL conditions before first flight. 

Second, check for very, very, very good grounds in an airplane that is so dependant on electronics. DO NOT count on the frame.  Strap and/or "Star" (i.e. home run wires) everything. 

Feel free to ask questions. 

P.S. Graphs produced from Dynon logs via custom software that I wrote.  Feel free to send me a log file if you want it graphed. 

danal (dot) estes (at) gmail (dot) com


At 11:23pm on August 5, 2016, Kurt Satter said…

David,

You can reach me about the charger at ksatter@Verizon.net ...  I can get it off to you by Monday.

At 9:24pm on May 16, 2016, Doug Malloy said…

Hi David. Hey, need to ask you about your experience with the Skytek tank. I talked to Keith at Skytek and watched the Rotax videos and am impressed with the product. Not impressed with the price and not sure about the 1 gal capacity. They say 7 and half minutes at full power for a Rotax engine if you are down to just the header. Assume then for a UL it would be about half that. I plan on a UL350is. I have seen the pics on your installation but do you still think this tank is the way to go?

At 5:25pm on March 17, 2014, Walt Snyder said…

David, too funny, I happened to zoom in on your dog because I kept thinking he really had a short muzzle for a German shepherd, and he looked like a cool mix………..then I saw someone stole his legs…… Pretty cool dog, purebred? I don't see many out here with shepherd markings like that.

Walt Snyder 

 
 
 

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