sandal

Both engines seem to be very good. Both of them now have a twin-needle carburettor with built-in fuel pump. Both will fit in my plane. Similar price, similar performance, etc.

Are there any reasons to choose one over the other? Will one last longer than the other?

ahicks

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The RCGF 10 carb w/internal pump would be news to me. Where did you see that? RCGF USA website still showing single needle w/remote pump:
https://www.rcgfusa.com/rcgf-10cc-3

I currently have 2 10cc Evo engines, but I've had good luck with other small RCGF engines (20&26cc), and will likely pick up an RCGF10cc one of these days - to be able to satisfy my own curiosity regarding your question. Particularly interesting is RCGF is claiming it will swing a 14x6 - which is getting into 15cc territory as far as performance is concerned. The 10cc Evo does a nice job on a 13x6. I also believe rear intake reed valve engines generally handle better than the front intake rotary valve design. Whether or not that carries into the 10cc engines remains to be seen here.

Which one to get? I wish there were more user reports on the RCGF engine..... -Al

sandal

Al,
Thank you for your reply.

On rcgfusa.com, there is also one called RCGF 10cc BM. The "BM" might be a little misleading. Usually RCGF BM engines are Beam Mounts, but in this case it means Walbro-style carb. The RCGF 10cc and the RCGF 10cc BM are identical with the exception of the BM having a Walbro-style carb. There is even an upgrade kit available. I am sure the single-needle carb works just fine, but being able to adjust high and low independently makes me more comfortable buying the BM version.

The RCGF's ability to turn larger propellers than the Evolution is a good point, I hadn't noticed that. Turning a larger prop would suit my flying style better, as I usually do "bush flying" (low and slow).

Please feel free to comment. I am particularly interested in hearing from people who have seen both engines in action, but all comments are appreciated.

ahicks

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Awesome! Hope that saves others from some confusion as well.
Thanks, -Al

dirtybird

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I have an RCGF15 and have yetto get a flight on it.I have had it two years.
In my estimation that flapper valve in the rear is just an extra part that can fail
Their carb is a walbro copy. It is not a Walbro

Love2FlyMN

I've been wondering this exact same thing.
Anyone have any other opinions on the two?
From what I've seen in my research, I'll be going with the RCGF.
I already have an RCGF 20.

ahicks

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Thinking I would go RCGF for my next one as well. The new carb does it for me. I like the idea of having a choke, prefer reed valves to rotary, and according to the specs, it should swing an inch bigger prop.

The bigger struggle here would be 10cc vs. 20cc. There's so little difference in price, and the number of air frames available for the 20's that I might be interested in are greater.

To get good (OK, great) performance with an Evo 10, you need to be at something close to 5lbs, maybe a hair over. The 20's do really well (stupid) at 7.5lbs, and continue with great performance (unlimited vertical) up to about 10lbs. FWIW, -Al

Love2FlyMN

I think I'll be going with the RCGF then.

I already have the airframe that it's going on. I'm putting it on a Top Flite Cessna with floats. I think on that airframe with floats, the 10cc would be a good combo.

ahicks

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This one? http://www.top-flite.com/airplanes/topa0300.html

Wingspan: 81
Wing area: 906sq.in
Length: 64.5
Weight: 10-12lbs
Wing loading: 23-28oz/sq.ft

If so, that's a LOT of plane for a 10cc gasser, especially with floats in mind. That's pretty solid 20cc country from where I sit.

Love2FlyMN

It's this one. The 40 size.

That on floats.

http://www3.towerhobbies.com/cgi-bin...FRCRaQodeMwMdA

ahicks

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Whew! Much better....

pedroaleman65

I also bought the RCGF10cc with the walbro-style carb and I made a short bench run last week. Spinner and Starter were not necessary. No matter cold or warm engine. I used my alcylate fuel with only 2% oil. I could not get a small amount of oil at the cycle shop or the agriculturer. They wanted to sell one liter to me..... Okay, no special mixture for running in. It should be working.

The prop was also the size I will be flying with. A Fiala 14x6" wood prop. I knew, this would not load the engine too much. I had to open both needles a little bit, and then the engine ran really good from idle speed to full throttle. I did not make some rpm readings. Sorry!

So the next thing was testing the engine with the OS G5 gas glowplug. And it just worked fine! The L-Needle was okay and no tuning needed. The H-Needle had to be closed about half a turn. Idle was low and stable and starting so easy like before.


including the sensor wire, I can save around 225 grams of weight. Quite good!


carb was turned 180° to make a real easy connection with the throttle servo. As you can see, the mounting plate and the gasket have two holes to supply the carburator pump with pressure. No mistaking.....

To fit the normal, big Tygon tube I had to modify the carb nipple (brass tube) with a piece cut from those plastic parts used for garden ponds or aquariums. The former nipple, for driving the separate fuel pump, was easily closed with a M2 screw and high temp silicone. Just turn it in!

Hope to get my downsized machine ready to fly soon! Curious to see how this RCGF performs in the air and how my new SFG´s will work....... greetings from germany....Pedro


more pics of Raudilio pequeno in my gallery