Anyone seen this one ?

Looks great

http://www.youtube.com/watch?v=_YHaMqP-3Qo

Since Gaui make helicopters, its also a heli motor.....thats cool too
Electric starter.

I could even imagine installing it in a boat since it has electric start, and has a cooling fan :-)

This might even be videos from the test flight of this engine.....but im not 100% sure.
Looks like a CMpro 50cc Zero as a testbed.

Thailand World Technology FG 50
泰世科技 FG 50四衝汽油引擎 飛行測試 2

http://www.youtube.com/watch?v=TYFcWILRopg
http://www.youtube.com/watch?v=68bRU-tudzs
http://www.youtube.com/watch?v=cmPx9Jkeu8M

Found a video more with operation of the onboard starter :-)

http://www.youtube.com/watch?v=Tlit3I-1zPU

and heli version
http://www.youtube.com/watch?v=e7C5UUcgNFk

It doesnt look like its very strong of an engine but is darn good looking. I can see someone adding a supercharger to it already to swing a 24" prop....

Looks like it is installed in the ESM Zero too

Found this number on the prop:
GAUI fg50 apc 21x10w 7000rpm

http://www.youtube.com/watch?v=kQEZbnuBbRI http://www.youtube.com/watch?v=smaMpy6J_Ig&list=UU7f_RvMF4X20qtVak7K5mgQ

It all boils down to Price ! Are these available yet from where ?

It all boils down to Price ! Are these available yet from where ?

I don't see them on the DA site !

yea, lets hope the price is right.
If it is too close to the awesome Kolm engines, then they will be difficult to sell.

7000 on the 21x10 sounds much better. I hope its in the 600-800 range

Kolm engines are fully made in Austria and Gaui ones are made in Taiwan
I believe Gaui owner wants to become rich in a short period of time.
I think people would buy a reliable product and keep money in the EU

Kolm 53 = 975 EUR = reliable over the years
Gaui 50 = 1000 EUR = first gas engine for guinea pigs

1000 EUR ! If that is fact, they can keep it. No where near the quality of the Kolm. Notice the threaded lifter bosses above the cam box, this kind of assembly is prototype at best.

780€ in Germany

My new engine has arrived

awesome, where did you order it ?

Sky Aviations GmbH

Thanks....found that place earlier too

New Vids :

https://www.youtube.com/watch?v=e93xFqT8vgk&feature=youtu...be https://www.youtube.com/watch?v=gm3bPHn3U0c&feature=youtu...be https://www.youtube.com/watch?v=Gy5snVXluLc&feature=youtu...be https://www.youtube.com/watch?v=6RzlJCDslFU&feature=youtu...be

I just made an inquiry to DA on this engine the other day... its right up there in the same class as the OS GF40... although I believe the GF40 produces more HP, but more towards the upper RPM limit... although no numbers were discussed, I suspect this F-50 produces a bit less HP than the GF40, but produces more torque, but not by much.

I like the design, its got a steel liner, and bronze valve guides / seats... if you look at the cut-away images closely, the valve seat inserts are completely catapulted by the rocker base.

The GF40 has a liner-less cylinder, chrome plated aluminum... and chrome plated / aluminum valve seats which are part of the head casting... nothing wrong with that design either... OS has a good reputation for producing very nicely designed and reliable engines... I have one for my super cub.


This F-50, if they can bring the price into a competitive range, will prove to be a good contender in this class of engine... and just because its made in Taiwan, doesn't mean anything in today's world... you can get crappy quality made stuff here in the states, it all depends the individual companies ethics... based on the design of this F-50, Gaui's got some talented people working for them, and who knows where the design initial came from, as the US and other Countries have a large interest in Gaui.

Although its a bit rich for my blood, time will tell whether it catches on and becomes a popular choice in the 4 Stoke market, but I suspect, we'll be seeing other full CNC designs popping up with a bit more competitive pricing.


John M,

Anyone bought one yet ?

They seem a bit hard to find?

I'm considering buying one...there's a build thread over on the Giant Scale News forum... someones doing a Aeroworks Sports Cub Build with one of these F50's in it... so far it looks pretty good mounted upside down... the valve cover and part of cylinder head pokes through the cowl, total about 1.5 inches if that... and the exhaust pipe and muffler are out side the cowl, but it look nice.


John M,

Just flew one today on a top flight p40.

Not impressed by any means.

its a you try out motor.

Locked up first flight

running 20:1 vp fuel and tached at 6800 and running rich but not overly rich.

has the power of a dle35ra

Thanks for the feedback.
I might try the torque pro 70cc instead.

"BUMP an old thread"

Finally got the F-50R... was a Christmas present from my wife... Hornet Flyer, sorry you had a bad experience... its imperative you per-lubricate the bottom end and valve train when starting up a new 4 stroke engine... the "R" out performs my OS GF40 as expected, producing just over 4.2 HP with a Xoar 20-10... I've got mine in a H9 super cub, I have about 20 flights on it, and very pleased with the performance.

This is the video that got me interested.


John M,

Its a great looking engine :-)