Chad,
You think it is safe then to remove the baffle from the inside of the muffler? I am not too concerned about power as this plane will be plenty fast with the engine stock. Most smoke mufflers I have ever had any experience with had a bar going across the entire muffler that had holes in it and most were fed from opposite sides. I guess I could just put the nipple on and have it spray down across the path of the exhaust port which would probably be a far easier modification.
I want to make sure that if I remove that baffle that is does not cause engine overheating due to leaning out the ratio more than I can compensate for...
Thanks for your input.
Charlie
ORIGINAL: arobatx
The internal baffle is robbing your engine of performance...and quieting things down a bit. Typically injecting the smoke oil into a nice hot spot in the exhaust, close to the exhaust port on the cylinder, but 'aiming' it away from the cylinder should work fine. I'd be surprised if a spray bar as described would get you any better results than a simple inlet nipple attached for injection....but i haven't experimented much with that stuff.
Edit** Also, beware of some soft mounting...it can actually end up transmitting MORE of the harmful vibrations to your airframe and equipment. Generally, a properly tuned engine, and balanced prop/spinner combo will offer good results on an appropriately sized airframe as compared to the power.
Chad