Have any of you tried these mufflers? Just wondering if they hold up. My new DLE muffler died on the twentieth flight, blew the end of the can out.

[link=http://cgi.ebay.com/New-Smoke-Muffler-DLE55-DLE50-DA50-GP50R-gas-engine-/290457230269?pt=Radio_Control_Parts_Accessories&ha sh=item43a0999bbd]Ebay smoke muffler[/link]

Be aware of product from CHINA(((((JUNK)))

Have you used it? Do you know anyone who has?

Silly response.
The engine itself comes from China and is known to be a good and reliable engine.
This looks like the stock side-dump muffler with a smoke nipple.
If you are happy with the price, I see no reason why you shouldn't buy it

You won't regret to buy that smoke muffler. I can sure it is make by aluminium 6061 and the manufacturer is a Taiwanese who doing his muffler business in China to support many gasoline engine manufacturer. Buy it and enjoy and the manufacturer is fully support to his products

Thank you for the responses. Yes, the motor itself is made in China and it rocks so one would think that it is possible to have quality products come from there. I wish I could speak to someone who has already used one of those mufflers. The stock DLE muffler is very thin and weak (and mine fell apart after 19 flights). If this muffler is built more like the DA's stock mufflers are, then I'm all over it. I'd just like to hear from someone who has actually used them before spending the money.

I like this style over the pitts because 1 - it's loud (I don't have noise issues in my neighborhood) and 2 - I feel like it lets the engine rev better. One of these days I should do a RPM test but it's funner to fly than test.

Anyways, I am leaning towards trying one of these mufflers but sure would love to hear from someone who has actually used them.

There is yet to be made any muffler from China that has the wall thickness and weld quality of those made in America or Canada. At best you will receive a muffler that is for all intents and purposes identical to the one that blew out. The new one will have a smoke nipple installed close to the muffler port. All the Chinese mufflers are the same, only the shape, exterior finish, or the addition of an internal baffle separates them from each other. Thin walled, questionable welds, and cheap define them as a singular group. For Novausa to say the Chinese are using 6061 aluminum in their muffler construction was ludricous. The stuff definately is not 6061 by any standard the rest of the world uses.

If you want a DA type muffler with a smoke nipple, buy a DA muffler with a smoke nipple, or better still, buy one without a smoke nopple and install one yourself for $1.50. Buy the nipple, drill a hole, tap the hole, install nipple. It's that simple. You could also buy a great muffler from any one of a number of vendors that make quality products but they cost a bit more than the E-Bay Chinese junk. In your case, you are excited more by a super low price and fail to recognize quality comes at a higher price. To simplify, you get what you pay for.

Agreed with what you say Tired Old Man. The whole reason for this thread is because I want to hear from someone who has actually bought one to verify whether or not the build quality is .... quality. Since no one is chiming in, I'm assuming that no one buys these things. If no one buys these things, there is a reason why.

Whether or not they back up their products is a moot point because they are located in Taiwan. If I ever had a problem, shipping it back would not be worth the time and money.

Novausa, you are from Taiwan, I have to wonder whether or not you are the seller of said mufflers???

I'll give this thread another couple days, unless someone chimes in who has bought one, I'm not going to be the tester. I'll pay the extra for a slimline pitts or DA stock - and drill and tap a hole for smoke, just like I have done on three other mufflers (yes, that is easy and works great).

Novausa is closely associated with Tomy RC products, who does indeed make exhaust systems for our engines. They also make a very thin walled cannister and header combination for engines.

I beg to differ with some of the statements above.

Close to three years ago when I started selling gas engines the muffler were failing on a daily basic, Stacks falling off and ends blowing out.

Through a lot of research I found a company in China to make me some replacement muffler and after about a year with no failures in them I had them to make me mufflers for different brand engines.

In the last two years not one has been returned from failure, I did give a refund on a set of mufflers for a DA 120 because the customer was told by someone at DA if they used them they could possibly over heat there engine and void there warranty, That is hog wash and they know it, The mufflers have a 25mm tube and a 25mm inlet, So how could this cause a engine to over heat. ?????

Milton

Milton,

You have to admit the materials used and general quality of the mufflers arriving with the Asian engines could be a lot better. I think it's great you found an Asian manufacturer that can and does make a better muffler but those arriving as production parts with Asian engines don't normally fit that category.

I agree with that, Like the first ones I got.

Was not worth there weight in salvage weight.

If you look at a lot of the warranties for engines coming out of China they say they do not warranty the mufflers. ????



Milton

I offered muffler warranty to every engine manufactuer who order stock muffler from me.
I'd like to invite somebody who want to estimate my products then publish their result here.</p>

I wish they would too! That's the whole point of this thread.

Yes I have used,and they dont last pretty long,garbage for me,I bought on ,it last 3 flite

How did it fail?

Do not let the price fool you on the mufflers, You will not find a better muffler anywhere

They carry a one year warranty, If the muffler fails from material or workman ship in the first year you have the option of a free replacement or a full refund, Your choice.

Plus you get a one year crash warranty, Damage it in the first year and get a replacement for 1/2 the sales price plus shipping cost

This is our warranty.

Copied and pasted from site.

Milton

Really??!! I'd like to know how did it fail. Leave P.M to me and will transfer the message and picture to the manufactuer to take new one replacement for you.

No longer have the muffler,it just camae apart in one end

I'm familliar with these mufflers, they work great with smoke.

I built a Wild Hare sukhoi for a friend and fitted a DLE 111 with two of these smoke mufflers. They worked very well probably because the thin brass tubing is coiled up inside allowing the smoke fluid to be preheated before it is sprayed into the hot exhaust flow.
The only issue we had was noise. There are no baffles inside, and the exaust pipe outlet ends just at the weld, it does not go any further up inside the muffler to break up the exhaust gases before it exits ... so its almost like running the engine with open exhaust ports, this created a few 'polite' complaints of noise down at our field. Even tho' we rent the field, it is also part of a public park, so I decided to make some baffles, as the last thing we wanted was complaints from the public and to lose the field !
It's a simple enough solution, I cut two pieces of 22mm copper pipes long enough to slide up inside the exhaust outlet pipes and touch the top inside of the muffler chamber. I drilled out a series of 6mm holes [I think it was about twelve or so] all around the top 2inches of the pipe, then pushed them up inside the exhaust outlets all the way to the top inside of the muffler so the holes would be inside the muffler chamber to act as baffles and break up the exhaust gasses. Before I slid the last 2inches of pipe in I smeared it with some JB Weld epoxy to secure it and make a snug fit, then for added security I drilled and fitted a 3mm nut and bolt through both the outlet pipe and copper pipe about a 1/2 inch from the bottom rear ends. The results were amazing! A much quieter engine without any noticable loss of power, no more complaints, and impressive smoke!
As an after thought, if I was to do the mod again I would drill a series of holes all the way along the copper pipe which would make the whole thing lighter and put less weight/stress on the muffler outlet pipes, or better still use lightweight aluminium tubing. All I could find to fit at the time was some 22mm copper pipe which is a good fit.
The model has done around 10 flights so far with no problems and no signs of failing around the exhaust oulet welds.

Hope you find this useful.

Good modification you have done. Will bring this to the manufacturer and advice to make improve if possible

So no issues besides noise zlin50L? How long have you used them? Half the reason I am interested in them is because of the coils inside for the smoke. That is a hard thing to create myself (unless you guys know some trick). One of my complaints with smoke is that no matter how low I turn down the smoke, not all of it gets burned and it makes a massive mess, so the more oil I can burn w/o blowing it all over the plane, the better. I know I probably can't get completely away from that but hey, every little may help.

But, beyond the smoke, durability is my biggest concern. So far we have one guy who owned one for three flights before it died and one guy who has liked them but we don't know how long they have lasted.

what the durabilty is satisfied your need? About the three flights and died, That is incredible to me.

Just an FYI for people that want a smoke muffler for a gas engine.

There is zero need for a copper or brass pre-heat coil in a gas engine muffler. The fluid only needs to get so hot to function correctly, and gas engines generate the extra heat required for the fluid to transform to smoke where glow engines do not. Locating the smoke nipple on the muffler exhaust flage places the incoming fluid in the perfect path for the best temperatures and functions beautifully without having the extra cost and weight of a smoke coil. Once again people with glow engine backgrounds don't understand the differences between gas and glow.

So any muffler can become a "smoke muffler" on a gasser. All you have to do is install an inlet nipple. Nothing special or difficult in doing that.

Durability.

I have a friend who owns a slimline pitts on his DA 50. He has flown that plane for five years now w/o any issue at all. That's what I'd expect for durability.

My J-Tec had the stacks crack after about 50 flights (one season for me).

My stock DLE fell apart after 19 flights (less than a one month).

To me, a muffler should never crack or fall apart. I'd expect it to outlast the plane.