Rflyin

My Feedback: (6)

Yea, but it's a rare thing!! And I'm not old just prematurely gray.

Rick

cmopar

hey Rick what kind of rpm u turning on those 9/4 props ? what fuel u using ?
thanks Corey

Rflyin

My Feedback: (6)

Hi Cory,
Depending on the day, high humidity will lower rpms, low 18's to low 19's.
The norvels like Wildcat.
Rick

cmopar

what % of nitro also can u take picture of mousse can muffler apart next to ruler to show lengh of header and can i think i
found that can that has a threaded lid im going to try to make one i picked up a cheep gms 25 and with 5 % fuel i got 16.5 to 16.8
if i can get a little more i think this motor will b fine

thanks corey

Rflyin

My Feedback: (6)

Hey Corey,

First, I don't know much about the GMS motors but that is right were the 25FX and Norvel motors run stock with a old style MAS 9x4.
The new style MAS they call a G/F 3 Series has a wider blade and runs a little slower on my motors. I normaly put locktite on all screws and nuts and RTV on the backplate and the carb to case joint. More ntiro generally means more speed but I think most guys run 15% and if the muffler has a internal baffel of some type taking it out will help. Here's some pics. If you make one the rules say the overall length can't be more then 8 inches. I think 18k is about the middle ground, there'll be some a little faster, some a little slower but keep in mind the fastest plane rarely wins. Have you decided to come to the contest for sure?

Mousse Can Write Up
http://www.georgiacombat.com/KYMousseCan.html

Rick

Montague

The GMS .25 is under powered compared to engines like the OS, Norvel, Irvine, and Webra. Yes, it's cheap, but it's not worth even that low price. Even with a can.

aimmaintenance

Oh I'm not so sure about that. If he is turning those rpm's with 5%and stock muffler I'll bet he'll get real close with a mousse on it. No matter what I'll bet it will be faster than the Butterfly.

Montague

Well, you obviously don't have to take my word for it.

But I have seen guys show up at contests with GMS .25's, and they have always shown themselves to be under powered. And there have been plenty of people who had them who posted their experiences that were consistant. The GMS is about the same as the Magnum .25, which is also under powered. Now, if you know how to work on engines, you might be able to figure out why and fix it, but it's generally easier to buy an engine that produces more power out of the box.

Right now, there is one engine that is clearly more powerful than the others, and that's the Webra. The OS, Irvine, and Norvel are all proven engines with lots of track record.

Rflyin

My Feedback: (6)

Rick's ready, Gilkeyville here I come!!

aimmaintenance

Aaron's gonna have to start from scratch I'm thinkin.
Avenger is weighing out so far at the max. Made a FATAL error when covering. I used colored DUCT tape without realizing that it weighs a ton more than the other tape. Wing alone weighs about 1 .lb 13 oz. Stacked it all up my scale tonight and weighed up a grand total of 3lb 6.5oz. I'm considering keeping the Avenger for Hell over Hillside and slappin my .32 on it and scratchin out a couple of new ones for Detroit. I'll decide what I'm doin tomarrow morning. I'll be in the garage by 7:00 and if I'm starting over I'm gonna build a whole new BUTTERFLY that's gonna whip ass! Sean and Corey are plannin on cuttin spare wings for their Avengers this week but I'm thinking on just sticking to my whole Butterfly concept. I get a kick out of the design/build process and quite honestly I think the Avenger is cool but it's just not much of a thrill to me. I got some new parts ordered after last weeks durability test flights, so as soon as the UPS gods smile on me I'll have some decent combat gear.

aimmaintenance

Well after sleepin on it I've decided to take the tape off the Avenger and use housewrap and paint to recover. I also dreamed up Butterfly version 12 that I wanna build today. Rick,, How much for one of those extra engines ya got? Call me or something.

aimmaintenance

1 lb. 4 oz. stripped

cmopar

hey Rick thanks for the pics that will help alot and YES i will b there !!!! my wife knows how much cheeper this
will be instead of going to the dunes

Corey

Capn America

My Feedback: (3)

Avenger wing one covered last night. Start building header pipes tonight. Aaron, use one of the spare wings we are making and build your own fuse if you want something slower, i mean different.....

Capn America

My Feedback: (3)

Rick, is that a setup you are flying now? do you really leave the extra length of header pipe in the can? Most pipes ive seen have you shorten the head pipe to tune them.

Montague

On a full length pipe, you cut the header down, and the header ends where the pipe starts.

On a mousse can or other "quarter wave" pipe, the header actually does extend almost all the way through the can, and it's not cut down. If you cut the pipe short so it ends just inside the can, it won't work, you won't have a tuned exhaust, you'll have an expansion chamber muffler again.

The reason for this is the pipe coming in to the can creates a longer area for the pressure wave to develop, which is necessary. The pressure wave actually comes out of the pipe then reflects inside the can outside the header, towads the "top", then back. Basically it makes U-turn out of the header and back to the front of the can.

If you take apart an ultrathrust muffler or a Jett muffler, you'll find an inner bit of tubing in there doing the same thing. This inner tubing is what makes it "tuned" and not just a big muffler.

Capn America

My Feedback: (3)

Got it, now i just need to find some of those cans tonight and i should have 6 made up. Here is the first batch.

Rflyin

My Feedback: (6)

Hey Corey,
How did that Underpowered GMS do on the Mousse can?

Rick

cmopar

Well its hard to say i think it will work maybe it will get better with a few more tanks through it lol
i have to say im pretty amazed that it even ran arnt u ? hehe!!

aimmaintenance

It was almost as fast as the butterfly. Keep tryin.

Montague

If you bring it up to Detroit this weekend, you'll get a direct comparison to a lot of engines and airframes...

aimmaintenance

Well I know that regardless of which is faster, or can turn tighter, loop harder, the Butterfly will be pullin the most streamers!

(thats because I'm launchin with extras)

Capn America

My Feedback: (3)

I still need to drop a little over an ounce of weight but other than that i think im ready. This thing really flies well. Out making low level passes and turns last night. Amazing how low you can stand it up on edge and flip it around. A couple more flights this week and i guess ill be as ready as ever.

Aaron, i guess its good to have a plan....

Montague

Oh yeah, you aren't flying combat until you're picking the streamers out of the grass. If the weather holds, you'll get plenty of practice down on the deck this weekend.

Capn America

My Feedback: (3)

I have been know to loose visual for short periods of time during the weed burning sessions. Last practice it dissappeared into the weeds and back up out. I think this new 11" prop is really going to help extend the streamer cutting reach and weed removal....

we will also be testing the new laser guided attack system. Lasers mounted in my sunglasses track the streamers and guide the avenger to targets. Should make things a lot easier