ROSSI 45
10-30-2009, 07:31 PM
#26
RE: ROSSI 45
....Amen, 2walla.....you beat me to it. 
Here, on planet Earth, the Rossi is top notch. The semi flexible
pipe mount for both the mini-tuned pipe, and the Rossi long
pipe is second to none.....bullet proof.
The exhaust flange sports a nylon bushing that seals the exhaust
completely.....no leaks.....and doesn't wear out. The pipe is held
onto the flange with a perfecly tentioned spring. The nylon bushing
(not an o-ring) does not allow the pipe to contact the engine.
There is no better semi-flexible pipe mount that I've ever used.
I once put a Rossi mini-tuned pipe on a HP engine that doesn't come
with an exhaust, and there is no provision to mount a muffler. As you
can see, the Rossi flange and pipe set-up fits like it was made for the
engne, and of course it was expertly installed by me. It does take some
gonad to do this type of installation on someone eles's new engine....
....for free.
Flyboy Dave.
Here, on planet Earth, the Rossi is top notch. The semi flexible
pipe mount for both the mini-tuned pipe, and the Rossi long
pipe is second to none.....bullet proof.
The exhaust flange sports a nylon bushing that seals the exhaust
completely.....no leaks.....and doesn't wear out. The pipe is held
onto the flange with a perfecly tentioned spring. The nylon bushing
(not an o-ring) does not allow the pipe to contact the engine.
There is no better semi-flexible pipe mount that I've ever used.
I once put a Rossi mini-tuned pipe on a HP engine that doesn't come
with an exhaust, and there is no provision to mount a muffler. As you
can see, the Rossi flange and pipe set-up fits like it was made for the
engne, and of course it was expertly installed by me. It does take some
gonad to do this type of installation on someone eles's new engine....
....for free.
Flyboy Dave.
10-31-2009, 08:43 AM
#30
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RE: ROSSI 45
Dude what planet are you from? Rossi motors are as well built or better than any mass produced motor.
Mass produced motors? My apologies, I was led to believe this was a SERIOUS speed forum. I cannot remember the last time I heard of a Rossi being used in any SERIOUS speed event. Pictures of nice clean engines on clean workbenches is one thing. Consistant, reliable use weekend after weekend in serious competition is a whole different thing.
I noticed nobody showed the muffler tail end hold down. Try running it without one.
For the record. We used the Rossi .40 for Pylon Racing many years during the eighties. The engine itself was excellent and the engine of choice. The muffler though even then was junk. The outer can was POP riveted to the header can you believe. Needless to say they all rattled loose and fell off. As soon as we purchased a new one we immediatley added screws between the pop rivets. You want to hear more? The carburetors were always falling apart as well. The retaining screw for the barrel was too hard. it would snap and there goes the barrel. We fixed that by using the softer cut off shank of the appropriate size number drill.
I have three Rossi 40s for free. Just come and pick them up. Sorry, no carbs or mufflers
I am all too familier with Rossi quality. Less expensive? not by the time we had fixed them. Then along came Nelson. Expensive? Initially yes, but buy it and fly it for years and nothing fell off.
Ed S
10-31-2009, 11:46 PM
#32
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RE: ROSSI 45
had 2 of those 45s, nice engine , but what a mickey mouse muffler setup. finally went to perf spec for a real muffler. not such a deal when you have to spend another 65.00. then i got smart and went w/ jett. suprised their were not more complaints about that setup w/ rossi. have an older rossi 40 w/ the better muffler. seems like a hotter engine than the newer ones.
11-02-2009, 02:56 PM
#33
RE: ROSSI 45
....in case nobody noticed, Rossi has improved their engines.
http://shop.vendio.com/RossiEnginesU...356/index.html
They always were, and still are great engines. There was a time when
Rossi had the best engines going.
FBD.
http://shop.vendio.com/RossiEnginesU...356/index.html
They always were, and still are great engines. There was a time when
Rossi had the best engines going.
FBD.
11-02-2009, 03:19 PM
#34
RE: ROSSI 45
FBD, they look like a good deal! I'll bet they sell very well.
I like the Rossi teflon O-ringed muffler that fits on the engine like a ball socket....as close to unbreakable and fool proof as it gets. I replaced the seal once when I rebuilt the engine. Still using the same old wrap around spring. Lots of wisdom in this design.
I like the Rossi teflon O-ringed muffler that fits on the engine like a ball socket....as close to unbreakable and fool proof as it gets. I replaced the seal once when I rebuilt the engine. Still using the same old wrap around spring. Lots of wisdom in this design.
11-02-2009, 04:55 PM
#35
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RE: ROSSI 45
....in case nobody noticed, Rossi has improved their engines
.......Still using the same old wrap around spring. Lots of wisdom in this design.
And what happened to the "Bullet Proof" muffler and "Wrap Around Spring Wisdom". I see it now uses an Ultrathrust Muffler. Am I wrong in saying that the UltraThrust muffler is a Performance Specialties, American designed and built product? Or at least give the Australians credit for the original concept with their "Magic Muffler"
I guess it was easier for Rossi to use somebody elses design rather than try to design one that did not fall apart.
Ed S
11-02-2009, 05:26 PM
#36
RE: ROSSI 45
The Ultrathrust muffler would work even better if it used the flexible mounting system. I've never had to replace a broken muffler or have a cracked exhaust flange welded on the Rossi, but I have had to do it on engines with bolted on mufflers.
11-02-2009, 07:40 PM
#37
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RE: ROSSI 45
i have both types in quantity, the nelson is very simple, but the rossi setup works and will give, not tearing up a engine case, any way according to axe rossi testing the rossi mini pipe still rules the roost against other similar designs, i just received my new 10MM carb from rossi today, going to test it back to back against the 8mm carb, 34.95 off of axe rossi fleabay page, bet it wakes a couple of my engines up, i havent had a issue ever in using the dave brown/macs tuned pipe clamp with the rossi minipipe setup
11-02-2009, 08:06 PM
#38
RE: ROSSI 45
Imagine trying to make something like that yourself for $35? I'm using a 10 mm venturi on the sport timed Nelson and it likes to have fuel draw choked a little until it begins to run hard.
Is the Rossi mini-pipe you speak of the black cannister?
Is the Rossi mini-pipe you speak of the black cannister?
11-03-2009, 10:45 AM
#40
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RE: ROSSI 45
and yes ranjit phelan is the one who first produced the design type commercially, the MVVS engines us the one closest to phelans magic pipe, no muffling at all....
11-03-2009, 11:27 AM
#41
RE: ROSSI 45
My Rossi was sold through Morris as "The Powerhouse" and it is THE engine that I spent most of my time in this hobby flying. It spent all it's time turning 11 and 12 inches props doing 3D.
It won't turn a 8x8 any better than a .32 will. I wonder if Morris had Rossi set these engines up differently for 3D? It has the black can muffler...it does have a great sound. When I first brought that engine to the field the pattern guys were all over it.
It won't turn a 8x8 any better than a .32 will. I wonder if Morris had Rossi set these engines up differently for 3D? It has the black can muffler...it does have a great sound. When I first brought that engine to the field the pattern guys were all over it.
11-04-2009, 12:47 PM
#43
RE: ROSSI 45
Jan, nobody here doubts that it puts out more power. The Ultrathrust muffler has a resonant tone and rpm boost that you can see and feel. The old black muffler is just a well designed muffler, but has no high rpm tuning effect or boost. If there is a technical reason why the old slip joint design doesn't work with tuned exhaust, I would guess that some reverse flowing gas gets hung up at the flange...whereas the port matched Ultrathrust muffler allows a much smoother reverse pulse flow. Attaching it to the engine any other way but solid bolting would probably interfere with it's performance, then.
11-04-2009, 09:45 PM
#44
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RE: ROSSI 45
the black rossi mini pipe seems to put out equal or better power at higher rpms, but the rossi 45 you have, has porting optimized for 3D, low exhaust timing, three intake ports and less compression...... the rossi adapter is the same for the mini or full length conventional tuned pipes, i need to take some pics of the different sleeves and post them here i think.
there is nice pdf on axe rossi's website with test data for most of their air engines with different props and different exhaust systems.
there is nice pdf on axe rossi's website with test data for most of their air engines with different props and different exhaust systems.
11-05-2009, 12:32 AM
#46
RE: ROSSI 45
Thanks for confirming my suspicions.....this sucker does what it's supposed to do so well, I figured to leave well enough alone. I'm impressed with Walt Morris for how he was able to get these engines tweaked for 3D. I should try it out with a 10x8 sometime. If it hits 19,000, I'll be sure to report back here.......
11-05-2009, 01:09 PM
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RE: ROSSI 45
Hi!
Sorry!
But the black Rossi "silencer " is what is known i pylon racing circles , a magic Muffler , a tuned pipe!
It looks the same inside as the Nelson tuned pipe!
Problem with the Rossi pipe is its weak construction and that you have to secure its stinger part to the fuselage .
You don't have to do that with the Nelson tuned pipe! Just bolt it on and forget!
Sorry!
But the black Rossi "silencer " is what is known i pylon racing circles , a magic Muffler , a tuned pipe!
It looks the same inside as the Nelson tuned pipe!
Problem with the Rossi pipe is its weak construction and that you have to secure its stinger part to the fuselage .
You don't have to do that with the Nelson tuned pipe! Just bolt it on and forget!
11-05-2009, 09:22 PM
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RE: ROSSI 45
my pipes havent fallen apart yet, but then again i see pipe mounts used that no pipe could survive[:-], my rule of thumb is to use mount at the balance point of pipe