RunRyder - Shadel Muffler clamp is done

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Main Discussion > Shadel Muffler clamp is done

Dabling
Heliman
Location: Studio City, California

I just got the new clamp for the 80,90 high performance muffler. Dave really did an excellent job in making it easy to mount on any heli. I don't know why somebody didn't come up with this design earlier. I have to give one up to the planker guy.

My prototype came with American Standard screws so that was a big "no no" in the heli world. See Dave, now I have to take away the credit I just gave you. But after talking to him on the phone to make the correction, he's one up again. Oh well. We have room for a planker who's trying really hard to appease us heli folks. He'll be making the rest in metric so you all don't have to rush to the hardware store to find the right hex for a 4-40 screw. As a matter of fact, you'll only need the 2.5mm wrench for everything including the set screw. I'll give him two credits for that idea. You see, it's the small details that count. Thanks Dave.

I'll attach some pictures so you can see the clamp. You can attach the muffler straight or at a slight angle if you'd like. The post that comes with the clamp will be 4 inches long so it'll reach any side frame. Just cut off the rest of the standoff with a dremel and you'll be all set to go.

I'll also post a picture of the valve set up I'm using for the pressure. I got it from a local hardware store and it holds up to 30psi. It's just a simple sprinkler system valve and it seems to be working great. When you land, simply walk up to the heli, open the valve and you're done. No more pulling lines apart and getting the check valve in the dirt. It's cheap and easy to install.

Dabling

02-19-2002 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

Dabling,

Is the muffler the 'standard' width of 40mm?

02-19-2002 Over year old.

HOMEPAGE

oldfart
Elite Veteran
Location: Vancouver, Canada

muffler Clamp

Dabling,

Such type of clamps have been available from heli-suppliers (Century, K&S of Japan, Hatori) for over 15 years

02-19-2002 Over year old.

GM1
Elite Veteran
Location: Tallahassee, Florida US

Clamp

I have the Hatori, and KSJ clamps and they are not adjustable in two axes as this one is. I got one of the mufflers to try on my 80 but haven't had time yet. I will also try it on my 61 and see how it goes.

On a dog sled team, if you're not the lead dog, the view never changes.

02-19-2002 Over year old.

Dabling
Heliman
Location: Studio City, California

The muffler is 41mm in diameter so if you all have any mufflers in this dimension this clamp will work.

Oldfart, Out of all the clamps I've used for years from those companies, I've never seen any thing like this that's adjustable both ways so maybe I'm missing something that you've known about. Let us in on your secret.

furyflyer, When you order the muffler, Just tell Dave which engine it's going to be mounted on and he'll send you the correct O-ring coupler. If you're currently using a Hatori two piece now, you don't even have to take your Hatori coupler off. It'll fit perfectly because the dimensions are the same.

Dabling

02-19-2002 Over year old.

HOMEPAGE

JasonF
Senior Heliman
Location: Northern VA

Dabling I noticed you are not using the servo support on the ccpm servo in the right side pic. Any reason for that? Also can we expect to see this pipe advertised on the web or is it a call and order only type of deal?

Jason

02-19-2002 Over year old.

oldfart
Elite Veteran
Location: Vancouver, Canada

Muffler clamp

Sorry Dabling, maybe I missed something, what do you mean adjustment in two axii?

The ones I have used:
a) set sizes 38mm and 40mm with one bolt to clamp and attach - these always seemed to break at the bolt area. The didtance from the attachment point was sellected by using different spacers.

b) set size 38mm and 40mm with a seperate clamp area and a seperate mount machined into the clamp. Again distance from airframe adjusted by using different length spacers. Worked better but area around where the spacers attached still had a tendency to fatique.

c) set size of 40mm but with two machined halves that clamped. worked much like B

I think most of the fatiquing may have been a result of the preloading from improper spacing when cutting the standoff spacers combined with the different vibration resonance of the engine mount area of the frame and the standoff mounting area of the frame. When I would mount the standoffs on Kalt L/G stiff rubber lord mounts they lasted a lot longer.

Upon closer examination of the enlarged picture of your unit it seems the "standoff" distance can be adjusted along the length of the standoff and secured with the allen key? If so that would/should certaily help.

02-19-2002 Over year old.

Lapointe
Senior Heliman
Location: Enumclaw, Wash

Muffler

Sold a Hatori one piece to get this setup and just got it Monday.
Easy to mount and hope to run it tomorrow. Got the american 4-40 not metric setup but o well It went on easy.
Looks good and hopefully it performs as you say Dab.

Keith Lapointe

02-20-2002 Over year old.

helinut
Senior Heliman
Location: Snohomish, WA

Keith so much for trying it today, the weather gods are not smiling.

02-20-2002 Over year old.

Lapointe
Senior Heliman
Location: Enumclaw, Wash

Muffler

No Kidding

( O well soon.

Keith Lapointe

02-20-2002 Over year old.

Dabling
Heliman
Location: Studio City, California

There were a few clamps that left performance specialties with the American screws before I was able to talk to Dave and correct the goof. I think there may be ten or so floating around with the Amercan standard. The rest will all be made metric. Only time will tell if anything has to be made different to the design of the standoff attachment due to fatigue from vibration. I'll just keep putting in flight after flight and see how it holds up.

Nadir at MTA hobbies called me today to let me know that the hobby shops will be carrying this muffler so now I guess you don't have to call Performance Specialties directly to get the muffler.

JasonF, I did some bench tests with the servo supports on and with them off. They really didn't seem to do much of anything. The screws are so long on the supports that they'll move more than what the horn will move when in flight. With good quality ball bearing servos you simply don't need them. The bearings take up the load like they're supposed to. Chip Hyde and I, have been flying without them with any problems. You'll also save an ounce of weight without them if you're really anal.

Any one with Furys. Make sure the shaft of the front tail transmission is locktited to the bearing above the crown gear. This seems to be a critical point of the machine. I've seen several shafts simply cut as if it were in a lathe because it wasn't securely locktited. I think when the third bearing block comes out for the mainshaft, it'll help to keep this problem down to a minimum. The main gear won't rock from side to side in flight causing undue stress on the surrounding parts(pinion,tail tranny etc). Having that shaft spin inside the bearing could cause RF and we all know we don't need that. So, do your maintainance and keep your heli in tip top shape.

Dabling

02-20-2002 Over year old.

HOMEPAGE

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Main Discussion > Shadel Muffler clamp is done

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