I had a chance to fly my 58 (stock BIG muffler) with a Vess 23a, I only flew a few minutes because my plane kept disappearing. The conditions were less than ideal, 40* and fog. I could pull out my old E6B and tell how far off standard conditions that is, but it might not have had that great of an impact on my numbers. Although, when I landed my plane was washed for me, it was dripping wet.

In stock configuration you should hit about 7300 +/- on the vess 23a, and have about 28-29lbs of static thrust. I was too lazy to re-adjust my needles, did not want to lay on the wet grass.

I seem to have to use tad more throttle to fly at similar speeds to the menz-s 23x8 (I was hoping for that) and pull out of hover seemed a little better on the hole shot, but did not steadily increase speed vertically as much as the menz. Then again, I could not go vertical very far before I lost the plane.
I can't wait to try a tuned pipe and hit 7900 on that vess or menz, both very good props for the 58, That would truely be better than foamie power

Is there a Pitts muffler available?

I'm sure someone does, try bisson, slimline, etc.

Doesnt look like Brisson or Slimline make ANY mufflers for BME.

JTec makes mufflers for the 44 and 50. Is the 50 the same?

I'm pretty sure the 50 is the same. BME also has the Pitts style mufflers for their engines. You can call Tom at BME and find out 100% about the bolt pattern on the 50.

John

I bought mine from Tom @ BME. I'll bet you can too.

When you guys say Pitts, do you mean side dump, or the one that wraps around behind the engine?

The wrap around style.

Guys....i am not 100% ;positive , but i don't think the old pitts from the 44cc and 50cc sport engines are going to work with the new 58 Extreme. The exhaust port alone is over 1-1/2 time the size of a DA-50 exhaust port. Tom really removed a lot of metal out of the exhaust port to let this little sucker breath. I know he has some pitts ( i think the bolt on side dump) for the 58's. It would be cool if Jtec came out with a rear dump and side dump for this 58cc motor.....that way you could buy a pair for the 116 extreme. I use canisters myself though , and that's what i'll end up using on my BME 58......just like the sound a lot better ya know?

I finally have some video of the engine running in the air, not much of a video though.

Don't laugh, my videoagrapher didn't do the best job of videoing, neither of us could figure out the camera Nothing special in the flying, just try to show how the engine runs in the air. It is tough to tell how well it jumps out of hover, but next time my son will not zoom in that much so you can have a better perspective of the pull out. There is no editing, just straight video, I have flown this engine from day one in this manor.

This might take a few minutes, fighting with you tube, never done this kinda stuff before and the down load is taking for ever, might not be until tomorrow.
Success, give it a few minutes to process, then it will work, I hope. Now I just need to learn to edit a video

http://www.youtube.com/watch?v=4Rr-7qtJvT0

The Pitts wrap around muffler for the classic 50 is the one you would use. BME has them in stock.

Motor sure sounded sweet! Pulled your EF around like a big foamie!!
What was the deal with the cub?

One of our fields is on a private strip at the edge of town (wasn't that way 10 years ago), so full scales come and go occasionally. They actually only use about 1/4 of the run way and never come close to us unless they want to give us a show

With the completely blue sky and my son's zooming in, you really couldn't tell much about the acceleration or hole shot. I never really pushed it hard, just wanted to show the throttle-ability and engine performance on the lower end. No one has posted a vid of this engine flying, so I figured it was time. My yak weighs 18lbs.
In my next video, I will edit it down to a reasonable size and toss the plane around a bit more.

It sure looks like the ticket for the bigger 88" 50 size planes in the 18 pound range.

yeah thanks RTK for posting that vid. I'm hoping to get my maiden in on my little H9/carden yak here within the next 2 weeks. If i added everything up right , it should come in a little under 17lbs. I think like 16lbs 10oz. If my motor can get tuned as well as yours , i should have a lot of fun with this little combo.

And RTK....since i'm getting ready to fire it up for the first time....what oil do you think i should do the break in with? Either the ashless oil or possibly penzoil air cooled oil? I'll run it at about 32:1 to 36:1 for the first 3-4 gallons , and then was going to switch up to the honda H1R stuff or possibly just stay with penzoil.

Not even sure how that longer header pipe of mine is going to work yet....but i'll cross that bridge after the first few flights. I have a shorter header that i could use , but i'll have to hack through the bottom of the firewall a little.

I've been running Pennzoil air cooled 32:1 from day one and will continue unless I try some Stihl ultra that I bought. Run what ever good oil you have on hand.
Too short of a pipe set up and large props don't work well with this engine, but you will never know until you run it.
Jeff, it is not running perfect right now, it has run better and will, when I get my header length right. My son wanted to go flying so I figured I might as well shoot some video.

What pipe are you running and what is the measurement from the beginning of the pipe to the middle of the rear reflector cone??

Hey RTK....

the header i had Karl up in canada make for me , was a tough one! I had to have some special bends in it to clear the firewall. I could have had it built a little shorter , but i just sent karl some phots and measurements of my set up , and this is what i got. karl is a craftsman to say the least...he built it exactly to spec.

With that being said....the pipe , from exhaust stack to the end of the pipe is about 13.5" and the canister is 8" long. The canister is about the same size of what a normal sized 50cc canister would be ( close to a MTW 75 i believe.)

here is a couple pics so you can check it out.

BTW....IF i have to , i can run another header i got from another guy on FG , that Karl built. It is about 12.5" long , but i can cut dang near 5-6" off the thing , since it only bends once , and then it's a strait shot to the canister. Only problem is , i'd have to cut into my firewall.

I wanted to run this longer pipe to at least see what it's going to act like. Any ideas on what it may do with that long of a header and canister set up?

You might be just fine the way you are, Karl sure makes nice headers.
I have never run a can on this engine, if it is a tuned type can and you are too short you will see a definite decrease in power and a rise in temps. If it is too long you just don't see the power, but she runs cool.
You should hit around the 7's for the average 23x8 prop (nx, menz) and 7300 for a vess23a. That is what I got with a stock muffler if memory serves. BUT,,,, at your weight, you will be ballistic with any set up

YES!!...that's what i wanted to hear! I guess i'll just have to get it fired up , and tuned , and see how she does. I know one thing , karls header won't be having any problem letting it breath ....the pipe is dang near glass smooth on the inside with an exact port match....hope she runs well.

Just don't let your roommate fly it!! Crazy devil

Jeff,

Which reminds me. I might be staying in Vancouver townhouse a bit later on. Might you have room at your house to store a 35% plane?

just had to jump in hear to get this thread back on track.i just ran the fourth tank through a BME 58 with stock muffler and a vess 23-a.needles have been tweak for good transiton and top rpm's, i got 7440 all good and warm with Belray at 50:1.is this the norm for this engine,if so i am very impress.

Yes, that is normal

All right spring is in the air and I'm sure there have been many flights on your 58s. Is the performance holding up? Are there any heat issues related to the lighter weight? How is the reliability any deadsticks? I could come up with about 17 more questions but I only need one more,,, Should I buy one?

Robert