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

Nose forks

Started this discussion. Last reply by David J. Beaulieu Dec 5. 3 Replies

As I ponder the ski installation on my 750 STOL V.3, and the addition of a short extension to the nose gear tube - I am curious about all the seemingly different versions of forks on Zenith…Continue

Engine oil analysis

Started this discussion. Last reply by Jerry Latimer Apr 27. 6 Replies

Anyone doing samples and testing.  If so, who did you go with and how was the customer experience and info provided?  Trying to figure out who to go with!  Thanks!DaveContinue

A/P and Dynon servos

Started this discussion. Last reply by Ken Ryan Apr 14. 5 Replies

FYI to builders...pondering servo size (strength) when installing their autopilot system. I have a STOL 750 with two axis autopilot ( Dynon SV-32 servos.)   During my 40 hr test phase I was having…Continue

UL Power crosses the Atlantic...

Started Mar 27 0 Replies

For those of us with UL engines...the latest KITPLANES magazine (May 2018)  has an article which may bolster your confidence in engine choice.  Eases my mind a bit regarding flying long cross country…Continue


David J. Beaulieu's Page

Latest Activity

David J. Beaulieu posted a discussion

Nose forks

As I ponder the ski installation on my 750 STOL V.3, and the addition of a short extension to the nose gear tube - I am curious about all the seemingly different versions of forks on Zenith aircraft.  There are different style forks on same models, homemade versions, etc.  Yet, I've not seen a preponderance of nose fork issues mentioned on any of these forums.  What's the story - if there is one?  Thoughts?Dave (bored pilot just waiting on a cylinder to fix his airplane engine)See More
Dec 3
David J. Beaulieu posted a photo

Snow Day...

No new engine cylinder, no flyable weather, but got a dog who likes the snow!Happy Thanksgiving to all you Zenith people!!
Nov 20
David J. Beaulieu posted photos
Nov 14
David J. Beaulieu posted photos
Oct 25
David J. Beaulieu posted photos
Oct 7
David J. Beaulieu posted a photo

Failed "fix" for oil leak

Looks like I'll be pulling a cylinder ;(The easiest attempted solution was not the solution!
Oct 4
David J. Beaulieu posted photos
Oct 1
David J. Beaulieu posted a status
"Yikes!! Discovered oil leak at cylinder/case stud on my #3 cylinder base flange. Water testing on amphibs likely on hold until next year,."
Sep 24
David J. Beaulieu posted a photo

Ready for airborne gear cycle checks

Annual condition inspection complete. Pressure switches adjusted. It's time to do some airborne gear cycles and more flight testing.
Sep 5
David J. Beaulieu posted a photo

Pressure switches

Spent some time wiring up the adjustable pressure switches for the amphibious floats. Just need to swing the gear a few times to set the pressure contact to pump pressure for gear down and gear up circuits.
Sep 3
David J. Beaulieu posted a status
"Did another hour of test flight with the amphib floats, updated status report"
Aug 31
David J. Beaulieu posted a photo

Amphib flight

The amphibious version of N826DE made a successful 20 minute flight around the Old Town airport today. As expected (based on W&B calculations) the nose was a bit heavier than with the traditional gear. Plenty of flight control and trim for…
Aug 27
David J. Beaulieu posted photos
Aug 14
David J. Beaulieu posted photos
Aug 7
David J. Beaulieu posted photos
Jul 23

Profile Information

Aircraft Model
Project Status
Building From
Engine installed (or plan to install)
UL Power
Building Experience
No Experience
Flying Experience
Commercial / CFI
Building and Flying Info / Your Profession / Other Background Info
Retired Military Pilot / Engineer by Education / Commercial Pilot by choice (until my CH750 is flying and out of test...)

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

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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!


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Comment Wall (9 comments)

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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.


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


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.  


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…


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 

At 7:56pm on December 2, 2013, Roger E Barnes said…

nice to here from you Dave your welcome to stop in anytime.

Our goal is to move project to Caribou this spring for assembly, and begin testing by November.

Your postings show fine work and great progress; the State of Maine is a great match for the 750 performance.

At 7:53am on May 7, 2013, Normand Lambert said…

Hi David,

Looking good ! Keep up the good work...It will eventually FLY...and well too !



At 7:44pm on December 25, 2012, Roger E Barnes said…

sure its convenient just let me know when you will be coming through.

Merry Christmas to you too

At 9:17pm on December 24, 2012, Roger E Barnes said…

Kit building a 601XL since 2008 goal is to have it complete by this spring.

could use the material from the crates for your bench, its usually good straight material.

goes without saying but take the time to make it perfectly level, mine sat on metal saw horses and was 4 by 14.

air riveter is a really good idea, and air drill if compressor is large enough with #20 and #30 bits probably ten each to start i got mine at Fastenall in Presque Isle and they can get mil spec hardware too, you will need a torque wrench that reads in inch pounds. 

when de-burring holes us a file, i used a drill bit and it chamfers as much as it deburs.

i have an acquaintance in Turner who has built and flow a 701, built a 601 and is currently scratch building a 750 so there is some experience around.

wing construction of the 601 required six 2x2x6foot thin walled steel tubing i have these here if the 750 construction requires tubing like this i would be willing to loan them out, tools too.




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