Originally posted by Tim Holley
One of my friend is putting a rc gas engine on his rcs 140 gas. Not finished yet has been having trouble. The covering that came on the wing was upside down. The replacement wing was crushed in transit both times .so still waiting for one more try......
As for the UCD wing,.. I didn't really know there is a top and bottom!
(as symmetric as it looks, and as good as it flies upside down.. you'd never know!). Only problem I guess is that the aileron servos would be mounted on the top of the wing vice the bottom... Oh well...
As for the idea of installing an RCS 140... I thought about this. After looking at the specs, and comparing them to the specs of an OS91FX, you will quickly determine the following:
Even though the RCS 140 is "2lbs w/ ignition" as the webpage says,... you still have to add the weight of the muffler (~another 1/2+ lb, depending on what you install). This doesn't even take into account the required ignition battery!
The OS91FX is under 25oz, w/ muffler.. with the RCS140, you would be adding another 1-lb up front ! Yikes! Imagine how much lead you will have to add to the tail to get the CG at 6" (for good 3D)
The RCS140 with muffler costs over $200 more as compared to that of the OS91FX!! Ouch!
Both have similar HP (2.6-2.8).
Obviously, the RCS140 will not easily fit under the UCD cowl, regardless what way you mount it (that is assuming you are installing a mulffer !
Nice engine nevertheless. I have to say that because I just purchased a ZDZ40 for my new Giles!