RunRyder - Tuned Pipe on Gassers any feedback?

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Gasser Model RC Helicopters > Tuned Pipe on Gassers any feedback?

Shiro Muji
Senior Heliman
Location: Japan

Hi I am planning to install Hanson Tuned Pipe on my gasser. Just want to know any feedback on those who used the same in their gassers. Does it really add power but difficult to tune?

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper

02-13-2008 01:19 PM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

I hate it

It adds power, but

It looks ugly on the model
It puts the CG back
It makes the model porpoise in FFF
It hangs on the pipe and only wants to run at 1 speed no matter what the throttle curve is.

Thanks but no thanks for me. Give up a little power to avoid the above. But with it you can beat any other ship with vertical climnbout speeds.

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

02-13-2008 02:57 PM

HOMEPAGE

TooBizzy
Senior Heliman
Location: Georgetown, Ohio USA

http://www.helifreak.com/showthread...ight=BLACKSHEEP

Watch the first Pilot Vid....Jon The Rooster and his Predator....

I have to agree with some of rbort's opinions....But I sure like to watch one that has one on it!

P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...

02-13-2008 04:29 PM

Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

hmm

I agree with some of the above, but choose to run it. Which version do you have? There is a large diameter like what I have and a smaller diam like what John the Roster has(or had). the main thing to remember is that if you can adjust the volume of the pipe for more volume you will lower the rpm that it comes up on the pipe to more usable(at least for a 26). I added about 1/2" Otherwise your engine will run like a rocket at 13k with more power than anything on the planet, but will vibrate you frame, servos, and electronics to death. Compromise the pipe to work at 12.2-12.5k and it will run like a clock.

cg wise I used a larger 4800 fremco. Cg is nuts on. Use a gov.

-Cody

All that a man achieves and all that he fails to achieve is the direct result of his own thoughts

02-13-2008 05:53 PM

Shiro Muji
Senior Heliman
Location: Japan

Thanks for the replies, I am not sure about the diameter of the pipe because it is still in transit. I bought this second hand. Right now I am fabricating the header. Not sure what is the advisable length of the header to make is more usable.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper

02-14-2008 01:46 AM

turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

Quote
Watch the first Pilot Vid....Jon The Rooster and his Predator....

I hate the sound......

Setup is everything, All my heli's can fly better than I can pilot them

02-14-2008 04:03 AM

Shiro Muji
Senior Heliman
Location: Japan

well. what I like most about tuned pipe is their sound! fantastic video of that predator with tuned pipe!

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper

02-14-2008 04:15 AM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

The Predator tuned pipe video

I just watched that (been a long time since I saw it) and some interesting things to note:

a) not sure what rpm he is running in a hover but the motor definately can't handle it with pitch. Either too much rpms or too much top end pitch or both as its constantly slowing down and speeding up during the maneuvers. Definately undesireable for someone that is trying to do smooth and consistant flowing 3D.

b) when he tries to do some tick tocks or the sort, the motor is bogging alot. Again not sure if its bad collective management or just too much throws -- to the point where its losing too much head speed and falling out of the sky.

c) at the end when he went to the lower rpm setting the motor ran like crap hesitating all the time. I think this is more common with the tuned pipe as it likes to run at one specific target speed only.

d) I turned up the volume on the PC and yes the sound is annoying. Don't think I'd want to spend an hour per field visit listening to this, but that is only my opinion.

Shiro try yours out and once you've had time to fly it and tweak it and do all you can do with it then come back and give us an honest opinion of what you thought of it.

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

02-14-2008 04:32 AM

HOMEPAGE

Shiro Muji
Senior Heliman
Location: Japan

sure Rbort, but right now I am still waiting for my pipe to arrive and still in the process of fabricating the headers. I will post later some update.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper

02-14-2008 05:56 AM

TooBizzy
Senior Heliman
Location: Georgetown, Ohio USA

FWIW...Shiro
You might reconsider making your own header pipe since it's design and length are critical. Check Cody's post from above where he added 1/2" to the length of the header to lower the rpm of the power band. Shortening and lengthening the header pipe is how you adjust at what rpm the power band kicks in.

I know Hanson sells the header pipe for your motor and application. You might consider getting one from him since it has already been tested for your heli and engine. Then its just minor adjustments from there to your liking...

P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...

02-14-2008 04:42 PM

Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

also

John the Roster's pipe doesnt sound like my pipe.

Here is a short video last fall before a rebuild when I had went through the engine and found junk in the ring to let blow by. I had just switched to the dx7 and only had 4 degrees cyclic in video. The power is much better now, but the last part of the video I was pressing the collective toward 11 and you can see the large torque the engine still has with the bad compression.

http://youtube.com/watch?v=Zl4Ge1UYWiQ

All that a man achieves and all that he fails to achieve is the direct result of his own thoughts

02-14-2008 06:02 PM

turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

The Doctor's pipe is a much better sound and seems to have more power than the other video. Flyng style too perhaps.

Setup is everything, All my heli's can fly better than I can pilot them

02-14-2008 06:56 PM

Quick Worldwide
rrAdvertiser
Location: Coopersburg, PA

WATCH THE HEAT

Hope you guys don't mind me chiming in with some of my own tuned pipe experiences.

I have been only flying gassers for 2 years now but I have some experience with pipes on nitro birds. Actually I have always perferred pipes over mufflers.

First off pipes on gassers should be a reqirement....Mufflers are lighter & somewhat smaller than pipes but the difference in power is amazing.

I use heat & sound to get the motor adjusted properly. The first few tanks the needles are touchy until the motor is broken in.
After at least 2 gallons the carb becomes less sensitive, to where there is good midrange with pulling power at top end is really noticable. Pipes max out power in small gas engines.

There really is not nessasity to make any length adjustments too the lenght of the pipe & header. Any supplier than make mufflers better be testing his mufflers & pipe out. There is replacement for hands on experience in this hobby.

I found out the alum headers don't hold up very LONG but the stainless if soldered properly will hold up with more weight & cost.
I feel mufflers as well as headers & pipes MUST be in stainless steel to dissapate the heat away from the engine it self. The alum just can't handle the heat.

I like the gas machines alott & have many new items in the pipeline & underconstruction now.

GAS & GO....QWW

02-14-2008 10:17 PM

Shiro Muji
Senior Heliman
Location: Japan

Hi Doc, would you mind telling me the length of your header? What I am modifying is the header of my old xcell muffler made by Zimmerman. I just cut a little and put some stainless elbow to fit my requirement. Most if not all of the header out in the market is designed for right side, mine is on the left, and I want the look of that one made for spectra which is a little bit angled upward.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper

02-15-2008 12:41 AM

Shiro Muji
Senior Heliman
Location: Japan

can you also post some of your pictures to give me some idea on how you install your pipes?

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper

02-15-2008 12:42 AM

Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

yea

"There really is not nessasity to make any length adjustments too the lenght of the pipe & header. Any supplier than make mufflers better be testing his mufflers & pipe out. There is replacement for hands on experience in this hobby""

I agree that most engine makers that would have a pipe would be aware of how it runs and at xyz rpm. However most know that a 26 at 13k rpm will not work for helis. Even though the pipe is designed for that rpm. The gov fought the pipe and the pipe won when I first messed with this. I have the pipe come on before the gov engages. This is the only way to do it and to do it according to what I have read you can change your volume of the pipe or chang the timming. I tried three sizes and found the best and am using it from the shorter factory size. The newer style with the slide may be much easier to adjust the tuned pipe.

I have some URLS I can post on mechanics of the tuned pipe. I would post pics, but my computer is in the middle of a reformat. My gallery does have one pic I believe that shows it.

-Cody

All that a man achieves and all that he fails to achieve is the direct result of his own thoughts

02-15-2008 03:02 PM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Cody...What I wanna know is

Did the guy who ejected crash into the stands and who is that in the dog cage?

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

02-15-2008 04:17 PM

HOMEPAGE

Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

lol

Not sure on the crash, but the goof in the cage is my brother after a couple beers. Those computer programmer geeks are all weird that way but very funny.

-Cody

All that a man achieves and all that he fails to achieve is the direct result of his own thoughts

02-15-2008 05:36 PM

rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

He looks good!

You should have put another couple of beers outside with a straws inserted into the cage and left him there for the rest of the evening with some photo opportunities

Then what happens when he's gotta go pee?

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator

02-15-2008 06:38 PM

HOMEPAGE

AceBird
Elite Veteran
Location: Utica, NY USA

Quote
I feel mufflers as well as headers & pipes MUST be in stainless steel to dissapate the heat away from the engine it self.

Wow, must be a new concept of thermodynamics for gassers. Aluminum emits more heat than stainless. That is why radiators fins are made of aluminum not stainless. I think what you are trying to say is stainless withstands the heat better than aluminum. That is because stainless oxidizes less than aluminum.

Cast iron withstands heat better than aluminum but it is also not a good choice for helicopters for the obvious reason of weight.

Ace
What could be more fun?

02-15-2008 09:44 PM

HOMEPAGE

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