I have a Rossi 45 that I used in an RC model but my RC flying is limited to doing circuits and loops so I usually just let my son fly it. I set it to run in a 4 stroke when level and, with my son flying, it does a lovely 4-2-4 break in square loops etc. Going up in a big loop it'll break to a 2 stroke on the way up but on the downward side straight back to a 4 stroke. My son's Enya 80X does the same thing at about half throttle (which is all it needs to fly vertical) in a model I built for him based on my stunter.

Gary
I have no idea what rate my Rossi uses fuel because I've always just filled the tank and gone flying because it's not like stunt where you must have exactly the right amount in the tank. However your fuel consumption is virtually identical to my ST G51 which uses 60cc (near enough 2 ounces) for a tad less than a 6 minute run time. There seems to be a general mystique about Rossi only being good for speed but their port timings are actually quite mild, no different to any other sport RC engine. That's for the SE type, I don't know about the RE versions.

Hi Gary
As I have stated here before the Rossi s we used ran very well, the only problem we had with them was the weight.

Randy

Hi Randy,
I appreciate your input, the Rossi 40 weighs in the 60 size engine range. According to the spec. the Rossi 40 develops more horse power than most of my 60 size engines. What I've found interesting, so far, is that the Rossi bolt pattern is real close to my ST 60. The Rossi has some very healthy motor mount lugs, compared to most engines. So far I've tried a 11/6 wide prop, 12.25/3.75 APC and a 12/5 wood prop. Didn't seem to change the rpm, fuel consumption about the same. Rossi told me that the Rossi 40 will swing a 13/6 prop without a problem. Seems like that prop would be a little big for a 40??? What do ya think, Randy, have your tried this big of a prop??  I have an adapter, for the muffler and I'm using a OS46SF muffler. Gary

Hi guys,

I was told that the Rossi 40 could handle a 13/6, I tried a 13/5 and I believe that prop is to much for her. She did great on a 12/5 prop, using only 2 ounces of fuel. The Rossi needs a little more breaking in but she's doing well. Very quiet with the OS SF Muffler. At the moment power wise she's very close to my OS46LA. My OS loves the 11.5/4 prop running at around 10,000 rpm's, using 5 1/2 ounces of fuel. At the moment I've been running the Rossi around 8,400 rpm's. Next trip to the field going to try and run smaller props on her, 10/7 or 8??? I think she broke in enough to let the rpm run wild and going to see what she'll do? Lap time, with the 12/5 is around 5.2, not bad? Rossi is correct, it will run in stunt mode. Randy, what do ya think would be a good rpm for this baby??? She's suppose to develop 1.9 horse at 17,000 rpm. So far I really like her, thinking maybe if I run a smaller prop and let some more R's in her, might get closer to her power band. Just wondering what size ship she will pull??? If she makes that much power, I would think she would be able to pull 62 to 72 ounce size ship? Most of my 6o engines are not rated at this much horse power. If she gain a little more R's in maneuvers and doesn't sag, might have a winner. Between fuel consumption, horse power and she doesn't weigh anymore than most of my 60 engines? Would appreciate any input cause I think the Rossi is a winner, at this moment, Gary