Engine Moutning position
 

Hey,
I was just thinkin about the advantages and disadvanteges of mountong the engine at different angles

my ucle has 2 of the same plane and yet the engine is in two totally different directions?! not opposite but a 45* angle

what are your reasons for mounting the engine in a certain way

can you just mount it at 12, 3, 6, and 9 o'clock? or any angle

what are the pro's and con's

P.S. I don't really care about the appearence, just mostly performance, and durability

THanks,
Scotty

RE: Engine Moutning position
 

Normally a side mounted engine positions the carburetor in the correct relationship to the fuel tank. The centerline of the fuel tank should be about 1/4" lower than the centerline of the carb. In practice, you put the engine on the firewall drawing on the plan and rotate it until you achieve this relationship. Then if the design allows the engine to be mounted like that, then do so.

RE: Engine Moutning position
 

so how does the fuel tank thing go again? what is the centerline? up and down? or left and right

and what of you move the tank so you have teh muffler at the bottom( that is how i would like mine)

but i don't plan on using the In-Cowl pitts style muffler

so i guess i have to cut the cowl away so it clears, but at my hobby shop they have a bin full of stuff for half price., they have on in there for regular price at 37.99 so whatever half of that is i can get one for

thanks,
Scotty

RE: Engine Moutning position
 

on the side view of the plan, look at where the tank is located. Draw a centerline through the tank. The centerline of the engine carburetor should be 1/4" higher than that. But the thrust line doesn't change, so you rotate the engine to get that position.

RE: Engine Moutning position
 

cool, now i get it

thanks for clearing that up

Scotty

RE: Engine Moutning position
 

Another reason for rotating the engine when mounting is to get it to fit into the cowl better. Having that cylinder head sticking up out of the top of the cowl makes a scale plane look like crap. ;)

If you look, you'll see many photos of scale type sport planes are taken from the left side of the plane. That way you don't see the cylinder head sticking out the right side. :D
Dennis-

RE: Engine Moutning position
 

I also believe that engine placement is mostly for looks

RE: Engine Moutning position
 

thanks cherry,

i think i will have it sticking out the right side, cuz that is how they show it in the manual, cutting a hole in the cowl, but

who knows anything about the Slimline "Pitts" style mufflers? are they only for appearence or do they have an impact on sound or performance?

thanks,
Scotty