Rebuilding GSM026's BME-115

[Hammbone]

Good news????????????????

[KrisW]

	Quote: Originally Posted by Hammbone
	Good news????????????????

Well. .the wind was 15+ gusting to almost 30, so I consider even getting the plane back on the ground in one piece to be a good thing.

Overall .. yes, I am very pleased.

One note . .There are THREE carburetor modifications, and two basic reed block modifications, ON TOP of the contoured pieces I made, in order to achieve a smooth running engine. Copying the pictures won't do you much good, though it's a starting point, because it's a total system approach, instead of just addressing one or two of several factors involved.

Basically, the engine now runs like a DA-150. .extremely smooth on transition, no burbling on roll overs, KE, or upright-inverted transitions, no matter what the throttle setting is, very good top end power with no overheating issues experienced, and a very smooth and reliable idle.

The engine exhibits a minor richness below 1/3 throttle, but no matter how low you go with the throttle, for how long, the response is quick, clean, and no evidence of stumbling or sagging. At 3 clicks off idle, the place where I most expected it to burble, I rolled KE at 25 feet off the deck, and it just kept running the same. On the next pass, flying at this same throttle setting for an entire circuit, I repeated the 1/4 roll to the other KE, and still, no burbling, stumbling, or sagging. Another circuit, and roll inverted, and it never missed a beat or acted up.

I never touched the throttle stick (3 clicks off idle, the worst part in the settings for problems) except for rudder inputs for 5 minutes. . .and it never missed a beat or burbled/sagged one time, no matter what I did with the airplanes attitude.

Doing the same test manuvers at steadily lower, or higher, throttle settings showed the same lack of excitement . .just roll the plane and keep flying. . gone are the worries of sagging or bogging. Kick the rudder hard in KE and it just keeps running like it did upright. On top of that. . do an "escape manuver" out of any situation, from low throttle to max, and the engine responded perfectly, no matter what the attitude was or what you were doing.

Except for the wind considerations, you could say that flying with this engine was almost boring.

I like boring. . anyone can fly boringly predictable and dependable engines.

As for top end power. . .as good as it's ever been, if not better, and a lot cleaner sounding down to about 1/3 throttle, even though the top end needle is still stuck at 7/8 turn out.

Sooo .. there's a lot more going on here than what I showed in the pictures, and the hand-made items are just the first stepping stone to produceable units. Inside of 2 weeks I'll have the final design perfected, and molds on hand to modify any BME-115 inlet system WITHOUT taking apart the reed-carb mounting plate pieces. It'll be a bit dicey, but I've figured a way around that necessity, so anyone who sends me their inlet pieces won't have to worry about new parts. All old parts will be used as part of the solution, which will save a lot in the long run for anyone interested in this fix. I want the upgraded 115's to be indistinguishable from their "Stock" brethren.

Now, I have to swap inlet systems to the one using the pieces from a 110, then go fly the plane again tomorrow to see how THAT works out. This part should be VERY interesting.

[RTK]

When you type OH YES I did not see any post after that and I was questioning as to what OH YES meant.

Keep us informed. I have a friend coming back from Iraq and he would like to run his new 115 on the original WB and not experience any thing out of the ordinary.
Thanks for all the work Kris

[KrisW]

	Quote: Originally Posted by RTK
	.

a DOT?? that's all I get is a silly little DOT???

GEESH

[RTK]

Read one post above

[KrisW]

	Quote: Originally Posted by RTK
	Read one post above

Just kidding with you ralph. .

[Hammbone]

Sounds great Kris!
Thanks for all your work on this.

Jim

[KrisW]

	Quote: Originally Posted by Hammbone
	Sounds great Kris! Thanks for all your work on this. Jim

I'm just glad there is a way to permanently make the 115 run as well as possible. There are about 250 of the 115's out there. Now we have an answer to this issue.

[flatfuse]

Just tell us when, and mine is on it's way.

[KrisW]

	Quote: Originally Posted by flatfuse
	Just tell us when, and mine is on it's way.

What I'm planning on doing, Flat fuse, is setting up the entire intake system, then flying it on MY plane, before sending it back to the original owner. That way I KNOW it's righteous, and the carburetor is halfway adjusted properly. There are variables with every carburetor and engine, though they all fall within a certain set of tolerances, so I expect that by doing it this way, with my own personal 115, I'll get things as close as they could be, making the setup as bolt on and fly as possible.

If you'd like to be a guinea pig, for a bit of a cost savings, let me know via PM. I'll need to know which carburetor you are using, and the reed block is basically the same across the board.

thanks.

[Pontiac_40]

Great Work!! KrisW. At least somebody took the bull by the horns!

[flyin woodbutcher]

	Quote: Originally Posted by Pontiac_40
	Great Work!! KrisW. At least somebody took the bull by the horns!

Thats some crazy crap. The Bull grabbing the Bull.