Yes, more weight...."Oops",. yes, I missed that, thanks. Okay, let's add some more weight for the fluid and heat exchanger/radiator.
Any more info--did it use a PSRU (I'm assuming it did). Engine displacement? "Small block" B&S tops out at 627cc, 33HP would be a tall order for an engine designed for 22 HP. Did it seem to run at/near max available HP in cruise flight?I am out at an ultralight strip now, just watched a small block Briggs Vanguard conversion flying a Quicksilver. 33 hp conversion (with a hop up cam and other small stuff) and a minimal exhaust muffler system. Flew just fine on a single surface 2 axis Quick. The original idea to use this on the Ranger now seems perfectly valid to me if the Ranger turns out to be reasonably light. The engine appeared perfectly airworthy for whatever it's worth.