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New GP Engines GP-38 Single

New in the Great Power Engine lineup for 2020 is the new GP-38 single cylinder engine.

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GP-38 Single

New in the Great Power Engine lineup for 2020 is the new GP-38 single cylinder engine.

Here's what GP has to say about it:

"Another game-changer is coming in 2020, no surprise that GP has developed the most powerful and reliable two-stroke engine in 30c.c. engine for UAV propulsion system and model aircraft!

GP38 will come with a stock wrap around Pitts Muffler, four Ferrari-red engine stands, CDI, NGK spark plug and screws for the propeller, Pitts muffler and stands."

Specs:

  • Displacement 38 c.c.
  • Bore 38 mm
  • RPM Range 1400-10000
  • Output 5 Horsepower
  • Total Weight 1000 g
  • Ignition Weight 136 g
  • Muffler Weight 144 g
  • Gasoline 92 Unleaded
  • Gas/Oil Mix Ratio 40:1
  • Carburetor Walbro HDA-246
  • Spark Plug NGK CM-6

Reccomended 3D props: Falcon/ Xoar 20x8 (break in), 20x9, and 20x10

Bolt pattern is the same as a DA-35

Official Product Website: https://www.gpengine.world/product/17/93

Photos: (coming soon)

Videos:

Official Product video:

GP38 New Product Official Advertising Video (3 min 37 sec)

(NOTE The GP-38 in this video is a pre-production model. the production model will include a Pitts style muffler, and a standard four bolt propeller pattern)

My personal GP-38:

New GP 38 -pilot laser -Cale Miller (6 min 37 sec)

Get your GP-38 here:

https://www.aviatorplusrc.com/product/gp-38cc/ (United States)

Last edited by Jim T. Graham; 07-13-2020 at 09:07 AM..
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Old 07-06-2020, 11:45 AM
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So far, I've flown two GP-38 powered aircraft and I can say for a fact that the power is absolutely insane. Easy starts, smooth power transitions, and an impressive presence at the airfield. This will be a great engine for not only 3D aircraft, but also warbirds and other sport aircraft.

This engine is a fantastic match for Extreme Flight's new 78" Extra 300 V3, the Pilot 73" laser, AJ Aircraft 73" laser 200, and many, many more aircraft.
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Old 07-06-2020, 11:45 AM
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Reserved for future info/ posts
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Old 07-06-2020, 02:45 PM
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Quote:
Originally Posted by cale10 View Post
So far, I've flown two GP-38 powered aircraft and I can say for a fact that the power is absolutely insane. Easy starts, smooth power transitions, and an impressive presence at the airfield. This will be a great engine for not only 3D aircraft, but also warbirds and other sport aircraft.

This engine is a fantastic match for Extreme Flight's new 78" Extra 300 V3, the Pilot 73" laser, AJ Aircraft 73" laser 200, and may, many more aircraft.
I will back up everything you're saying. I put one on pre-order with Aviator Plus and it was sent out quickly when the first shipment came in.

I had a DLE35 in an Extreme Flight 74" Laser and it was fine but not impressive power. I swapped in the GP38- have 30 flights on it now and power is clearly much better - ear to ear grin good power. Very happy. Now that plane is a real "hot rod". Compared to the other 35cc singles I've personally seen the GP is clearly stronger. Other flyers ask me what I "have in there" after seeing it go.

Starts easily. After the first flight I don't even choke it- I just flip it and it usually starts on the first flip. Workmanship is top notch, muffler works great.

I only have a couple of negatives.
1) with all of that power it puts out, I am seeing vibration-related wear in places where I didn't with the DLE. The tabs on the front of the hatch were wearing so I redesigned with dowels/brass sleeves and it's fine. Also, I've broken off the mounting tabs on two throttle servos... so I had to re-engineer my mounting a bit. But I would not go back- any vibration related issues are worth the performance and just need to be monitored.

2) The prop mounting bolts are NOT the same as a DLE35. They are off just a bit. I wish that this was standard across all similar sized engines. Here's a picture with the backplate drilled for the DLE35 on the hub of the GP38.


Also- Prior to the laser I had the DLE35 in an Extreme Flight 78" Extra. My opinion was that this plane didn't have a "perfect" gas engine. The available 35cc engines didn't give quite enough power and the 50cc engines are (in my opinion) too much/too heavy... I agree with you- I think this GP38 is the perfect match for that plane.
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Old 07-07-2020, 10:30 AM
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I have that plane with a DLE35RA as well, and couldn't agree more for it being the perfect candidate for a power upgrade with the GP38.

Maybe the engine has a different harmonic vibration, maybe the two resonated the components differently to create the perfect storm. Not sure - just a thought.
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Old 07-10-2020, 04:41 PM
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I should have ordered one yesterday, I see they are out of stock already.
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Old 07-13-2020, 07:50 AM
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Looks like a great engine. GP seems to be making great products based on the testimonials I’ve read. They really need to produce their own line of headers though.....or specify which brands to use with each of their engines.
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Old 07-13-2020, 02:26 PM
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Looks like a great engine. GP seems to be making great products based on the testimonials Iíve read. They really need to produce their own line of headers though.....or specify which brands to use with each of their engines.
+1
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Old 07-13-2020, 06:44 PM
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prop

I just got mine today What prop have you found to be best ? Putting it in a pilot laser 73" also .
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Old 07-13-2020, 09:42 PM
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Originally Posted by bbezayiff View Post
I just got mine today What prop have you found to be best ? Putting it in a pilot laser 73" also .
Currently im borrowing a Falcon carbon 20x8 to run on mine, but Orel recommends a Falcon carbon 20x9. However I have a Falcon woodie 20x10 on the way and I imagine it will perform just as well as the 20x9. Ive seen DLE and VV 40's with the Falcon 21x8 prop and I'm tempted to give that a try eventually, but as far as I know no one else has tried that one yet.
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Old 07-14-2020, 08:34 PM
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What is the street price for this engine?
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Old 07-17-2020, 08:17 AM
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Extreme Flight 78 "Extra V2 was EME35 20x8 7400 rpm, didn't like how it flew. Replaced it with DA50 22x10, the model flew perfectly.
EF Extra300 78”/DA50/22*10 (6 min 51 sec)
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Old 07-17-2020, 08:53 AM
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$430.00 https://www.aviatorplusrc.com/product/gp-38cc/
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Old 07-17-2020, 01:32 PM
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i have a xoar 20x8 im going to try before i buy anything else. I fly at 4500ft so that makes prop sizing a little more difficult. I just cant seem to get the performance everyone else is getting . Thanks for the input . let me know what works for you please
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Old 08-20-2020, 03:33 AM
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Any more feedback on these?

Tony
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