RCGF 21cc Twin Gas Engine
RCGF 21cc Twin Gas Engine
06-26-2017, 09:37 AM
#4
I probably should not have weighed in as I'm not familiar with the engine, I simple went and saw specs listing rpms at 7300 for a couple of props and thought the numbers sounded low and might not fit "nicely".
I guess I had two thoughts in mind, the first is that Horizon marketed a bind n fly 1/4 Cub having a Zenoah G-20 that flew it nicely but I'm aware that the G-20 runs another K or more better than the specs listed for the RCGF 21cc. The other is that I'm flying a smaller than 1/4 Cub of 91" weighing 11.5 lbs and the engine on it is drives a 16x6 at 7500 and it is moderately powered at best.
No doubt the RCGF 21cc will fly the 1/4 Cub scale like and do so nicely. If nicely however means much in the way of aerobatics, then i don't know that it will do it.
But... again, I should have kept my mouth shut because I've no experience with the engine.
I guess I had two thoughts in mind, the first is that Horizon marketed a bind n fly 1/4 Cub having a Zenoah G-20 that flew it nicely but I'm aware that the G-20 runs another K or more better than the specs listed for the RCGF 21cc. The other is that I'm flying a smaller than 1/4 Cub of 91" weighing 11.5 lbs and the engine on it is drives a 16x6 at 7500 and it is moderately powered at best.
No doubt the RCGF 21cc will fly the 1/4 Cub scale like and do so nicely. If nicely however means much in the way of aerobatics, then i don't know that it will do it.
But... again, I should have kept my mouth shut because I've no experience with the engine.
06-26-2017, 10:44 AM
#5
AA5BY, on the contrary I appreciate your thoughts on the matter and am open to other opinions.....and in this case, I lean toward your point of view...........my major concern is that is the twin a "only one" type of plane for that engine!
Jerry
Jerry
06-26-2017, 11:10 AM
#6
My Feedback: (19)
Some observations, I've flown or observed a number of modern 1/4 full span Cubs with different gas engines. We have several CUBs flying in my group with DLE 20, 30, 35 and a RCGF 30 twin. The 20 pulls a fairly light SIG with authority. Certainly not overpowered but adequate. It will easily loop from level flight and climb performance is quite good. Excellent engine for a lightweight airframe. Moving up to the larger DLE 30 or 35, performance is greatly improved with nearly unlimited vertical with the 30 and unlimited with the 35. With the larger prop these are a joy to just cruise around at just above idle but the power is there if you need it. Any of the above engines and mufflers easily fit in a CUB cowl. The RCGF 30 twin has performance not quite up to that of the DLE 30 but does sound cool. My personal choice for a CUB remains a good modern 30 - 35 single. If I had to pick one today, it would probably be the EME 35 as they run with very low vibration compared to some other engines. I'm sure there are other good choices I'm not aware of.
06-26-2017, 12:35 PM
#7
I wish I could offer something about the NGH 38cc four stroke? You might check for reviews of how it is running.
In my opinion, it would offer better sound for a Cub than would a 2 st twin and is about the same price as the RCGF 21cc.
What I can say, is a Cub sure sounds great if it can be propped large to keep the rpms down and a four stroke can do that and especially if it has power overhead to keep the throttle low..
Best of luck in your engine search.
In my opinion, it would offer better sound for a Cub than would a 2 st twin and is about the same price as the RCGF 21cc.
What I can say, is a Cub sure sounds great if it can be propped large to keep the rpms down and a four stroke can do that and especially if it has power overhead to keep the throttle low..
Best of luck in your engine search.
