JoeAirPort

My Feedback: (41)

The engine with stand offs will give you a 6.5 inch distance from firewall to prop hub face.

Berwyn Bill

My Feedback: (16)

Thanks guys!

norbert001

Hi Peter,
Unfortunatley not at the moment, the last one sold Saturday but I'm expecting my order to be with me by the end of the week.

Paul.

Hammbone

My Feedback: (309)

Milton,
I need another muffler.

Has anyone else had their muffler come apart on them? This is my 2nd one now, where the back part of the can has blown out. This one only lasted 4 flights.

Maybe some of you aren't even using the stock muffler?

Jim

Bob Pastorello

My Feedback: (198)

Is the paint covering a lack of welding?
This isn't a good report, as I am sure the same process is used on the 102 stock mufflers, and I haven't flown any of them yet.

Are muffler issues with this engine common?

Richard D Bahmann aka/Wrongway

My Feedback: (42)

I only have about 10-flights of 10 minutes on my side muffler. So far ok.

Berwyn Bill

My Feedback: (16)

Is there a rear dump muffler for the Area 51 out there? The cowl on the Extra I'm picking up is cut for a DA-50 with a rear dump muffler and I'd hate to have to cut it some more for the side muffler.

RC Extreme power

My Feedback: (24)

Ham, Will get you another one out tomorrow.

I don't know what is going on with the mufflers, So far Ham is the only one that it has happened to. (two times)

The one ham sent back to me the weld if fine it failed where the edges bend to wrap onto the round part of the muffler.

I know of two of the engines that have well over 50 flight and mufflers are holding up well so far.

That was one thing that I did not like about some of the first engines I got from other manufactures was the thin and soft aluminum mufflers and these seemed to be very strong.

Bob our 102 has about 25 flight and the mufflers are doing good on it so far also.

Milton

RC Extreme power

My Feedback: (24)

If you are talking about a pitts style muffler, Anything that will fit a Sacks 3-7 or 4.2 will work, Such as a Fox, Brisson and any brand that uses a Sacks cylinder.

Slimline makes one for a 3.7 or 4.2

Milton

RC Extreme power

My Feedback: (24)

Just seen where J-Tec makes a muffler for the Sacks 4.2

http://www.jtecrc.com/sachswraparound.htm

Berwyn Bill

My Feedback: (16)

Thanks Milton!

Bob Pastorello

My Feedback: (198)

I have to admit, I really prefer the J'Tec "standard" Pitts muffler above the Slimline and Bissons. It's a preference thing, to be sure, but J'Tec is "solid", and really mellows out the tone (at least on other engines). I will probably get one for this 51.

Berwyn Bill

My Feedback: (16)

Thanks Bob. Have you updated you 50cc engine page now that Scott is out of business? That page is a great resource.

Bob Pastorello

My Feedback: (198)

I thought about it, but forgot to weigh my new engines.... I have the XYZ and Area 51 both, and wanted to do that but... in my haste to get them running, blew it off.
I will update it removing the Brillelli stuff, though. It is rather pointless to leave it out there.

SportFlyer3

Just ordered one last night hope to have it by this weekend but I wont be firing it up for awhile till I get the plane built for it...

Should be fun, it's an Ultra RC Katana that's rated for a 40cc but I'm going to try and shoe-horn the 51 in it...

JoeAirPort

My Feedback: (41)

Just be sure to reinforce the firewall, pin it and use triangle stock with Epoxy. Restraining systems don't work on firewalls that come off.

RC Extreme power

My Feedback: (24)

I was at a event in NC a couple weeks ago and talked to Al from J Tec about making mufflers for the Area 51cc and have sent him a Email to confirm that he will, When I hear from him I will post and let everyone know.

A lot of people say they like his pitts style mufflers over others.

Milton

JoeAirPort

My Feedback: (41)

I have a gallon and a half through one muffler and no problems yet. I machined the mating surface with the engine flat. Two have come cupped slightly (.010" or so) and they stay on much better and don't leak when I machine them flat. Maybe this is the problem with the two that failed but I'm not sure of that. I know mine vibrated loose when it wasn't perfectly flat. Vibration kills.

SportFlyer3

Thanks, will do !!!

miniman

Again this may be the UK concern about noise talking, but the J Tec exhausts are very noisy. they were sold over hear a year or so ago, and no body used them due to the noise.

Might be worth checking on them if you fly in a noise restricted area.


Peter

Hammbone

My Feedback: (309)

The two mufflers that failed on me did not come loose from the engine.

Jim

miniman

I was at our field today with Paul from Gashangar and did some noise checks on his own Area 51.

He was using a really good pits exhaust with twin outlets behind the motor "firing" into the ground and a 22 x 8 carbon prop. With the model sitting on grass, the noise level was 88dB at 7 metres, our limit is 82dB. This gives you some idea of the challenge we have in the UK.

I am still waiting on my new exhaust, but once it comes I will put some pics on here with the RPM figures and noise levels. It may help some others that live in noise concious areas.

Peter

JoeAirPort

My Feedback: (41)

Yeah I know, you told me that before. I was just wondering if the vibration caused the muffler coming apart. My 2nd Area 51 muffler cracked where the bolt holds the muffler on in the tube. It was not from the muffler not bolting on flat. It was perfectly flat. It just came apart for no reason other than a weld or material failure. These things are thin.

SportFlyer3

Just got mine in yesterday. Looks like a good piece. Will update when I get it shoe-horned into the plane...LOL

Berwyn Bill

My Feedback: (16)

What size bolts are used on the firewall end of the Area 51's stand-offs? I tried using the ones that had mounted the DA-50 that was on the Extra before but the threads don't match. I've got the firewall re-drilled and just need to get it mounted.

Bill

BTW - the engine is beautiful and Curtis at EF had it in my hands nice and quick!