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  1. #1

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    RCGF 20cc Gasser

    Just changed from a Magnum .91 4 stroke to an RCGF 20cc Gasser. This is in an Extra 300 60 size. 63" wing plane. Fired it up last night and this thing really seems to pull hard. I am running a 15-8 prop and it seems as though it will climb straight up with not problem. I have not flown it yet, just ran two 14oz tanks of fuel through it on the ground. Thing seems mean!!! Anyone flown a similar plane with this engine?? Any feed back would be appriciated!!

  2. #2

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    RE: RCGF 20cc Gasser

    Be sure to post back after your first flight, Im interested!
    Carl Goldberg Ultimate Brotherhood #56
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  3. #3
    thailazer's Avatar
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    RE: RCGF 20cc Gasser

    I'm interested in one too. Several threads on that engine out there and as long as you take care of a few things initially it seems like folks are having good results with it. I'm curious how much weight it added over the Magnum???
    Tiger Flyer #49

  4. #4

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    RE: RCGF 20cc Gasser

    I had a Magnum 90 four-stroke in a Great Planes 1/4 scale RV4 and swapped the engine for a RCGF 20cc and love it. The engine seems to put out a bit more power than the Magnum did and I didn't have to ad any weight...only shifted around the components a bit. I am using a 16x8 Master Airscrew prop and it matches the engine and plane very well. I am not the type that needs to squeeze out every drop of power from the engine to be happy. The vertical seems much better. I am sure you will love the change...and the cheep fuel costs also!

  5. #5

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    RE: RCGF 20cc Gasser

    I'm am pretty sure his motor weighs a bit more than the magnum did, but I had to add weight to the front to get the CG right and now I was able to take that weight out so I think it's pretty close to a wash on the weight for my setup.  From just running on the ground it seems as though this motor is pulling harder than the magnum did?

  6. #6
    thailazer's Avatar
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    RE: RCGF 20cc Gasser

    Sounds good. I checked on the weights and here are some comparisons:

    RCGF 20:
    900 gms
    31.7 oz

    Magnum 91:
    570 gms
    20.1 oz

    OS 35AX:
    363 gm
    12.8 oz
    Tiger Flyer #49

  7. #7

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    RE: RCGF 20cc Gasser

    I'd use metal geared servo's for a gasser.

  8. #8
    opjose's Avatar
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    RE: RCGF 20cc Gasser

    On a 20CC? Why bother? The gas engine is not going to put more of a load on the servos nor cause problems due to vibration.

    Heck I'm flying 50CC gassers ( Edges, etc. ) with 130oz/in cheapie analog servos ( $7.00-9.00/ea )and I've never had one fail over hundreds used.

    Metal servos tend to wear faster too, until you get into the more exotic range, such as titanium gear servos...

    Those I reserve for the bigger planes.




    There is an art . . . to flying. The knack lies in learning how to throw yourself at the ground and miss.


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