Texas 3D

My Feedback: (16)

Does anybody have any experience with this exhaust system ? How does it compare to the Tower Muffler or Ultrathrust Muffler ? Looks pretty cool on paper ?
Oh, does anybody have the specs (specially length) for it ?
Thanks

http://morrishobbies.com/morris/os46...d_adapter.html

Flipper

My Feedback: (3)

Looks cool, I have had good luck with those on the Rossi's and I have some extra's. I might just have to get an adapter for an FX an give it a try!

Texas 3D

My Feedback: (16)

well, I could not resist so I ordered me one of these tuned muffler/pipes ! We will see how good they are. What caught my attention is that you might be able to rotate the muffler a little and if that is the case it should fit nicely on profiles (or even my Flip) and clear the wing ! Anybody knows if that could be possible ?

DonH21

My Feedback: (3)

Yes , works great!

Don

TailTwister

My Feedback: (1)

Yup, it works good. I used a fairly large wire tie to strap it to my landing gear. You don't want it to just flop around. You can use the back of an Exacto knife handle (the small handle with the blade removed) to flare the end of the exhaust so that it will hold an exhaust deflector too.

ramcharger

I use this muffler on my rear exhaust Rossi 45 Powerhouse. It is noisey. I fly a baffleless stock muffler OS 46FX also. I doubt if the differnece between the 2 is significant. My Rossi is on a Morris Fun DEsign. I made a hardwood cradle for the muffler. I drilled a hole through the cradle and use a plastic wire tie wrap with a piece of green gasket paper between it and the tie wrap. You neeed to secure you muffler well or it will vibrate and wear the o-ring out on the exhaust port (for you its an adaptor) Ther are about 3 or 4 of these Rossi engines/mufflers in our club and if the o-ring goes bad you lose pressurization and Morris goes nighty night on request for spare parts. Mines been running now for 3 years.

Flipper

My Feedback: (3)

I ordered the kit and I also ordered just the adapter because I have some extra pipes.

TailTwister

My Feedback: (1)

I agree about the rings, they are about a once a year thing, but I've been flying 8 to 12 gallons a year through these engines. They are pretty cheap considering... This season I sold my Rossis and their pipes. I'm gonna miss that sound. In my opinion the Rossi pipe is quite a bit louder than the OS minus a baffle. If your field enforces sound rules, you may have a problem with anything below a 12.25 prop. The pipe actually resonates to help the exhaust flow. That's how it works. It makes quite the sound, as it is higher in pitch due to the increase in RPM and the material is very thin. The silicon exhaust deflector will help some, but it's pretty loud still.

Texas 3D

My Feedback: (16)

Loud is good ! This way I can hear my engine over all the other !

TailTwister

My Feedback: (1)

Yes, over everything... Like trains, hurricanes, and shuttle launches. Hopefully there are no close neighbors. I've heard louder, but not many. It's as loud as any tuned pipe I've ever heard. I liked my Rossi 53 on a Hobbico Spectrum. I flew an APC 11x5 and holy crap was it loud at power. 10 feet off the deck full power (16,500 rpm), and watch heads snap around at the fly by. I felt like Maverick in Top Gun. Yeehawwwwww! Of course that was followed by a dozen or so vertical snaps and a lecture by my safety officer. It was worth it though, every time!

Texas 3D

My Feedback: (16)

AWESOME AWESOME AWESOME is all I could say today at the field ! My Flip has know so much power with the Rossi pipe on the 50sx that I am really really satisfied ! Shoots straight up, and would fly to the moon !
Hovering is still pretty easy, and I have had no hard time holding it there, or having the engine jump on the pipe top early. Engine runs smooth, and mid range is no issue either ! Fuel consumption is not really much more . I just love the combo and power increase. Would highly recommend. A neat part is also that you can point the pipe down ot up, and therefore you have no problems clearing the wing on the flip 3d.
The only downpart is that it looks like that you might have to exchange the o-ring after a while. I am not going to worry right now, and just enjoy it.
And yes it is a real screamer ! Not recommended if you have noise restriction at your club.
Will probably order me another one

f2racer

Tailtwister is right, the pipe is basically a tuned expansion chamber. If you've ever heard a 2C dirtbike with lightweight aftermarket exhaust, you'll know what we're talking about. I also didn't think that the increase in dB was all that bad (but then again I've been flying with an MVVS 40 w/ tuned pipe for a while too). What rpms are you all getting with the pipe? I'm seeing 16000 rpm on my TT Pro-46 with an 11x4 prop and power is extremely linear. I put the combo on my 5lb Sensation, and the plane would literally jump off the ground within 10 or so feet and go straight up vertical until I was afraid I'd loose it since it'd gotten so small. I also have a Tower muffler which get's about 700 rpm shy of the Morris setup, but transition aren't as silky smooth.

WRXlovr

that pipe sux,period ask me why

TailTwister

My Feedback: (1)

Well, it sucks the exhaust from the ports... and it increases the available RPM. It's loud as heck, but very effective. Sounds like junk to me...

Texas 3D

My Feedback: (16)

Why should we ask you if you didn't wanted to give us a reason in the first place when replying ?

So far I love that tuned pipe system !

TailTwister

My Feedback: (1)

I love it, period! I already said why. Just watch the db's at sensitive locations.

f2racer

I'm very happy with the setup. I was going to buy and Ultrathrust or Jett setup, but I'd be amazed if they get me any more revs than the Morris setup. It's not perfect, you gotta secure the pipe, and the silicon O-ring won't last forever, but it sounds rude as hell and definitely gives my TT and OS 46s some extra pep! With this pipe, my TT turns more rpms than my Webra 50... Definitely worth every penny that I spent on it.

WRXlovr

more rpms? you dont need that in a profile,all this pipe is is an open pipe good for top end which again,you dont need.what its lacking is good smooth midrange and backpressure which IS what you need for a fun fly put a muff back on ull notive a good differnce

Texas 3D

My Feedback: (16)

hmmmm.... I think you don't read the whole threads

Nobody of us complained that we didn't like it or that we have midrange problems. And I do like to have high rpm's with that extra power when pulling out of a hover !
We indicated before that we do have a good midrange that is working great at least on our fun fly birds ! Maybe you have to set your engine right or have to find the right plane, engine pipe combo where you have a smooth midrange, and where the engine doesn't jump on the pipe to quick. As indicated before, the Pipe is working great on my Flip 3D and OS 50SX combo.

TailTwister

My Feedback: (1)

I've had 2 of these pipes and no problems. I learned to hover with one. The only time I ever got upset with the engine/pipe combo was 2 winters ago. When I cut throttle it seemed to "get stuck" on the pipe. It didn't want to transition down. I blamed it on the atmosphere (probably 10 degrees and fairly near sea level). All it did was make approaches a bit longer. On a 12.25 prop I never (except the mentioned incident) felt any midrange transition problems with 10% fuel. It gives 11 inch prop RPM on a 12.25 inch prop. Who would not want that for a fun fly?

WRXlovr

maybey its cuz ur runnin a os50sx and i got the 46fx i dont like the pipe

moses

A guy at our field had the Morris pipe on the Goldberg Ex-Treme 330, 46FX, APC 12.25 x 3.75. He did not like the pipe (midrange was not good) and he took it off.

Then he switch to a Zinger 11 x 5. He liked the prop better than the APC 12.25 x 3.75. Then he put the Morris pipe back on and he likes it. The midrange is apparently good. Finding the right prop to work with the pipe seems to be an issue as well.

Moses

Texas 3D

My Feedback: (16)

Good point !

TailTwister

My Feedback: (1)

That may be the key here. A tuned exhaust is tuned to a narrow band of rpm where it makes power. If the prop will not allow it to reach that band then there will be no boost in power, and maybe even a loss. I guess the 50sx has just enough more gusto to get the prop up in the pipes range.

f2racer

Moses, good catch, I didn't even think of that... I haven't seen the need to use a prop bigger than an APC 11x4 on my tuned pipe equipped TT Pro-46. Midrange is definitely there and transition is smooth. I'm pretty sure that the combo is producing in excess of 11lbs of thrust since when I go WOT with my Knife ARF (probably around 5 lbs) from a hover, the plane takes off as if shot out of a cannon. I'll try one of those APC 12.25x3.75CL props to see if it makes the combo behave badly.