Rossi 40 The First Run 

I bought a used Rossi 60 ducted fan engine and Byron fan at the Toledo swap meet. There was a tuned pipe in my swap meet "haul" but it was not the "reverse outlet" one that the Byron pusher ducted fan requires. Also, it appeared as though I was missing the aluminum header pipe. The only time I ran that engine was early at the flying field when I was alone. In place of the missing aluminum header pipe, I substituted about 5 inches of clear blue silicone tubing and some cable ties either side. I bolted on a Master Airscrew 11x6 propeller for a load. It seemed about right! The first time it fired up, it blew the exhaust silicone tubing off the engine. I added more cable ties but there is not a lot of room to clamp things down. Boy, was that engine LOUD (with the pipe connected) and FEROCIOUS! And THIRSTY. I could see the fuel tank level drop in real time - I think I was using a 10 oz tank and 10% nitro. When the engine came on peak, the blades of the prop flexed forward. I really thought they were gonna come off! Pity, I never got the engine speed - there was too much else to worry about. Finally, after only a short running time, the silicone tube LET GO - as in tore in two! On close examination, the inside of the silicone tube was eaten away as if one had used a rasp and a blow-torch at the same time! Yikes! A very scary brute of an engine indeed. I was exploring the possibility of putting this engine in a foam F-16 kit converted to DF (not pusher prop). If I could barely tame this beast on the test stand, it probably wasn't going match a foam kit!

Nice first run can not wait to see more

Oh yeah David. Love the sound of that devil ;) I have two at home waiting to be started. Already on planes... Thanks for posting my friend and see you soon, Robert Good work...

Fantastic 1st run! Thanks for posting! 👍🏻😃✌🏻

This needs a q40 pylon prop 7.8x6, This engine will run close to 30000rpms. That prop is way too big and wont allow it to jump on the pipe. The size of the carb is an indication of just how high this engine will rev...yes it needs that much air so given the engines small size it needs to rev to flow it!

Please forgive my lack of detailed knowledge of these engines, but the legend went that these engines used to really scream and peak out way above at least 20K RPM

those were one of the motors of choice years back for pattern planes. they hauled ass. loved them and piccos.

Hallo Dave, es gibt Tabellenwerte über die Länge des Resonanz Rohres. Auch den großen 10 x 6 Propeller kannst du mit entsprechen der Rohrverlängerung in Resonanz Betrieb bringen. Diese Motoren werden bei Resonanz Betrieb so richtig munter

I was having stage fright, watching and being afraid that it wouldn't run. It came with a piece of pipe that had been cut off of the header. That piece is about an inch long. So right or wrong someone tuned it. I didn't have a tach when I ran so only 11 was a surprise. Milt

The engine didn't seems to peak in the characteristic way when it hits the tuned region. More revs needed I guess. Thanks for the video.

Try an 8X6 and stand back!

Thanks for the show,how did you clean this engine like new?perhaps you can show us in another video mate? Do you have a demo how to clean Rc engine?

❤🦅

Do you still have this engine and would you like to sell it? Need the proper historical power for my Prather F1 build!

Hi ,I have the same engine ,it has never been started but it seems to lock up a bit when the piston reaches top dead centre,do you think that this is just that it has never been started?

That really runs beautiful, but (my estimate) on the stand it probably won't really come on the pipe (it looks like a fairly short pipe to me), and if you intend to fly it, you will find out what the remote needle is for.... :D These are really good engines (but that rear intake is not exactly convenient I always hated that)....

it is a thoroughbred pylon engine. don't be concerned with a (Harley Davidson idle) It will really sing on a 9X8. You need to let the engine unload to really come on the pipe. A 10X6 will hold the engine back.

This is a pylon racing engine it's high rev engine

For the first run is better to have low compression valve open then put high rpms and also open the high compression valve, while keeping the carburator open then you can adjust fine the low compresion valve. Afterwards start closing to a lean mixture the high compression valve but until some runa. After many runs then you can start closing both valves and you should not be having trouble with the engine turning off and look forward to achieve maximum response and power from the engine.

prop is absolutly not adpated,.