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


Started this discussion. Last reply by Robert Riat Oct 11. 15 Replies

FYI,  UL mufflers (at least for the 350iS) now come from the factory with a reinforcing gusset to the exhaust pipe flange.  I repaired my original (which had cracked), but ordered a new one in the…Continue

100 hr engine service, etc.

Started this discussion. Last reply by David J. Beaulieu Aug 8. 2 Replies

Started the 100 hr mx  service today on my UL350iS. For me, this includes doing the latest Service Bulletin 2019-02: integrated by-pass solution.  The kit costs approx $100 and includes a new fuel…Continue

New Service Bulletin

Started this discussion. Last reply by David J. Beaulieu May 24. 4 Replies

For those of you with older engines...http://ulpower.com/en/engines/ul350/ul350is#sbContinue

Blew an oil cooler today!!

Started this discussion. Last reply by Fred Williams Sep 2. 45 Replies

Going out for my second sortie and while in the climb with full power I got that hot oil smell and a bit of mist in the cabin.  Closed the heat control valve, reduced power and "bee-lined" to the…Continue


David J. Beaulieu's Page

Latest Activity

David J. Beaulieu posted a photo

Garmin InReach Explorer+

Fabricated a mounting bracket for the Garmin InReach. Completed Yearly Condition Inspection.
David J. Beaulieu posted photos
Sep 30
David J. Beaulieu posted photos
Sep 25
David J. Beaulieu posted photos
Sep 18
David J. Beaulieu posted a photo

Lunch Run to KMLT

Two Rans and Zenith. They gave me a 15 minute head start for the 42 NM trip I beat them to destination by 5 minutes! Mt Katahdin is visible in the far background approx 12 miles back.
Sep 13
David J. Beaulieu posted photos
Sep 7
A photo by David J. Beaulieu was featured

Hangar flying fun

Introducing one of the next generation to the flying world and getting to make airplane noises again (and not just to myself) - I think she did eventually warm up to the noise... "Baby Doll" was left speechless!
Aug 30
David J. Beaulieu posted a photo

Hangar flying fun

Introducing one of the next generation to the flying world and getting to make airplane noises again (and not just to myself) - I think she did eventually warm up to the noise... "Baby Doll" was left speechless!
Aug 30
A photo by David J. Beaulieu was featured

Remote beach in Maine

A place called Duck Lake. No cabins except for a Game Wardens summer place to work. Part of a Maine Wildlife Refuge. Perfect day for float flying.
Aug 28
David J. Beaulieu posted photos
Aug 27
David J. Beaulieu posted photos
Aug 26
David J. Beaulieu posted a photo

Summer in Maine

Put 2.2 on the floats yesterday. Today the dog gets to swim...and no, that is not a Zenith in the background!
Aug 2
A photo by David J. Beaulieu was featured

On the water

Picture perfect day for float testing
Jul 22
David J. Beaulieu posted a photo

On the water

Picture perfect day for float testing
Jul 21
David J. Beaulieu posted a status
"Finally floated N82DE and got mulitple T/O and LDGs from the river waterway next to the KOLD airport. No handling issues, kinda fun!!"
Jul 20
David J. Beaulieu posted photos
Jul 20

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 (10 comments)

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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.


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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