Canisters or Tuned Pipes??

[Dangerous Dan]

I voted for cannisters because I use them and know nothing about pipes. Does pipes have an advantage how do they compare typically?

Sound?
RPM?
Responce?
Throttle curve?
Ease of Tuning?

[Dangerous Dan]

My vote was for cans because I am clueless about pipes?

How do they compare?

Sound?
Power?
RPM's?
Responce?
ease of tuning?

[dick hanson]

You can make a case that says cans are tuned or not tuned and tuned cans are really tuned pipes.
If you want a device that is simply plug n play- you can buy cans that are not tuned - just simple large expansion cans.these are very tolerant to prop load and quiet the engines but may not add as much power as a large well matched full wave pipe.
Any device which increases flow through the engine --is going to increase power.
If it merely reduces restrictions-and reduces noise--call it a muffler .
If it increases flow MORE than normal open exhaust can do - call it tuned.
Tuned pipes or tuned cans are not just exhaust management devices.
When properly adjusted, sized/setup (whatever), they INCREASE the flow into the combustion chamber - The size of the fuel charge (mixture)is where the extra power comes from.
Not from some black magic as exhaust leaves the engine.
A tuned exhaust works just like a toilet plunger -It gets the shat (past perfect) out and stops incoming from spilling over. You can make a full tuned exhaust run perfectly with great throttle response . You must , however, have correct volume- length and prop match for engine size and rpm operating range.

[RustyTumbles]

	Quote: Originally Posted by dick hanson
	You can make a case that says cans are tuned or not tuned and tuned cans are really tuned pipes. If you want a device that is simply plug n play- you can buy cans that are not tuned - just simple large expansion cans.these are very tolerant to prop load and quiet the engines but may not add as much power as a large well matched full wave pipe. Any device which increases flow through the engine --is going to increase power. If it merely reduces restrictions-and reduces noise--call it a muffler . If it increases flow MORE than normal open exhaust can do - call it tuned. Tuned pipes or tuned cans are not just exhaust management devices. When properly adjusted, sized/setup (whatever), they INCREASE the flow into the combustion chamber - The size of the fuel charge (mixture)is where the extra power comes from. Not from some black magic as exhaust leaves the engine. A tuned exhaust works just like a toilet plunger -It gets the shat (past perfect) out and stops incoming from spilling over. You can make a full tuned exhaust run perfectly with great throttle response . You must , however, have correct volume- length and prop match for engine size and rpm operating range.

That is the best explaination I have ever heard on exhaust systems.

[krayzc]

i have run both cans and pipes and i love them all, i guess it comes down to price or which item will fit yoru plane or needs or both. I love a quiet plane an both of those methods all me to be pleasing to my own hears which is very important to me. I have flown planes that I owned and the whole time I was flying I felt like dam$ this thing is noisy...lol not a good deal in my book.....

I have a 3w-150 on cans right now and a Brison 3.2 on a ES Pipe......the other stuff is just a muffler

[obeid]

IWILL HAVE SOON 3W157 ON COPOSIT 3M YAK 55 IWLL FIT 3W CONCATER PIPBE ON IT

[chraptor]

Hi All,
i'm setup my Extreme flight 88'' yak right now, and i have now to choose witch exhaust system to install in. I use a DA-50R.

Regarding all the previous comment my idea was to go with the KS canister. in addition i have no experience with tunned pipe, and it's just my second DA50 (first is with stock muffler).
what are your feedback and comment about the choice ?

What difference between the KS and MTW canister ? witch one is better in the EF 88'' YAK.

I'm also interested into any tips/pictures for installation in the pipe tunnel.

thanks for comment and help

Michel

[KrisW]

There is no "better" in this case, as most canisters are set up about the same internally. go with what DA recommends, and you will be fine. Each design has it's own little considerations, but DA has done a lot of testing on their pieces and know your engine better than anyone else.

[HTSkywalker]

I have the Lanier Edge 87" (17.5 lbs RTF) and my flying altitude is 4500ft. What pipe or canister do you recommend for the DA50R ? any ideas how much power I may be gaining by doing so ?

[HTSkywalker]

Note that I am only aiming to increase power and extra noise is not an issue

[ULTIMATE1]

	Quote: Originally Posted by rcdart
	Rusty, first consideration is the airframe, some wont accept pipes, a few even may not take cans. I have a 100 on pipes in the yak, definateley more power than the other 100 on cans in my extra, but the cans offer more power than std mufflers. Another consideration can be your intended use, some pipe set ups can be a bit peaky in the mid range, this can be a hinderance in 3D. My advice, choose an airframe, then investigate suitable options.

Troy Built Models testing would disagree cans do lose power over stock mufflers????

CURRENTR&D PROGRAMS

50cc Propeller Testing Target Date: 11/2007
We are testing many props for 50cc engines to determine the best. Below is the info we have so far. We are waiting for some props to come in. We will retest all the props on one day and one engine for the most reliability.

PropRPMThrust RankingPT 23x8670027.5#1JXF 23x8660026.52NX 23x8620026.53Mejzlik 23x8650026.54PT 22x8730024.55TBM 22x8710025.256

To be tested:
TBM 23x8
Xoar 22x8, 23x8
Vess 22B, 23B
MSC 22x8
Ranking is the overall flying performance, not static test values. Both 3D and normal flying were considered.
Test conditions: DA-50 with standard exhaust on an engine well broken in. We used a digital scale tied to the tail of an airplane to obtain the static thrust. This is the thrust available to pull out of a hover. After static testing we flew the plane to determine the overall flying performance. Test plane was an Aeroworks 50cc Extra 260.
bet).We found that the MTW TD75K canister muffler hurts performance. A DA-50 will lose a few hundred rpm and several pounds of static thrust. Since the canister muffler is heavy and expensive, it's only benefit is less noise (but you knew that already I'll

[KrisW]

	Quote: Originally Posted by ULTIMATE1
	Troy Built Models testing would disagree cans do lose power over stock mufflers???? CURRENTR&D PROGRAMS 50cc Propeller Testing Target Date: 11/2007 We are testing many props for 50cc engines to determine the best. Below is the info we have so far. We are waiting for some props to come in. We will retest all the props on one day and one engine for the most reliability. PropRPMThrust RankingPT 23x8670027.5#1JXF 23x8660026.52NX 23x8620026.53Mejzlik 23x8650026.54PT 22x8730024.55TBM 22x8710025.256 To be tested: TBM 23x8 Xoar 22x8, 23x8 Vess 22B, 23B MSC 22x8 Ranking is the overall flying performance, not static test values. Both 3D and normal flying were considered. Test conditions: DA-50 with standard exhaust on an engine well broken in. We used a digital scale tied to the tail of an airplane to obtain the static thrust. This is the thrust available to pull out of a hover. After static testing we flew the plane to determine the overall flying performance. Test plane was an Aeroworks 50cc Extra 260. bet).We found that the MTW TD75K canister muffler hurts performance. A DA-50 will lose a few hundred rpm and several pounds of static thrust. Since the canister muffler is heavy and expensive, it's only benefit is less noise (but you knew that already I'll

Actually, we have no idea what they did with the MTW 75K canisters. Perhaps the canisters are too small, perhaps they did not optimize the header length. It does not sound like they went out and tried to tune the exhaust header length for best top end power, or different canisters to see if they increased power due to their size.

In my experience, a properly sized and tuned canister is good for 250-300 rpm increase, with some magical setups gaining as much as 500 rpm over diverters. Not fiction. . fact. But, you have to hunt around sometimes to find the right canister for the job.

I am pretty disappointed at the numbers they posted, though. My BME-50 turns about the same rpm (within 100 rpm), with the same size NX and Mejzlik props.