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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › An OS Hyper question for HatoriUSA
01-14-2006 04:28 PM  13 years ago
DS 8717

rrProfessor

Here wishing i was somewhere else

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A lot has to do with the blades you use. I used V Blades at first and it loads the engine too much. I have since tried a lot of different blades and found the RotorTech blades to be the best for hard 3D,they dont load the head a lot and are very fast on cyclic's,but still auto very good. I tried SAB,NHP,V Blades,MAH,TT,Stock Glass blades,Maverick,TG and the Rotortech are the best of the lot. DOUGYOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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01-14-2006 05:31 PM  13 years ago
u.k. sailor

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cambs uk

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At the risk of hijacking the exact thread i have a question.
I am looking at mufflers for the 90 engines and have both the OS and YS. The perceived wisdom is OS use 8.1 gearing and 8.45 for the YS.
I use the MP2 on both engines, and believe it is designed around a gearing range, which is below 8.45. and more like 8.1
I am thinking of trying one of the Hatori 938 3D mufflers.
I thought with full tuned pipes that the length was altered to match engine RPM. Therefore as the mufflers we use are not adjustable they presumably want the engine to run within a certain engine rpm to work properly.
My question is can you run a given engine/muffler/gearing combination, and have it work happily by adjusting the head speed so that the engine RPM is to the muffler/pipes likeing.
Or to put it another way can sombody give clear comment as to the relationship, that is going on here.
I would like to try my YS with a gearing of 8.27 using the MP2, this should suit the muffler but isn't the recognised ideal for the engine, if the head speed is raised does it then suit the engine but not the muffler? i think it should still be okay for the muffler am I wrong?
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01-15-2006 10:50 PM  13 years ago
Unbalanced

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Melbourne, Australia

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Ok so the 522 is a tuned pipe then - is described as a muffler on hatori's website - sure looks like one, just a bit longer than the 544. You'd need to be right in the design game to know but I suspect there is some blurring of the terminology going on here. No dispute that all the incarnations of the MP2 are half wave pipes (and tune like they are) - but does this stretch to the hatori mufflers ?

Is the definition of a tune pipe that it increases the effective capacity of the engine ?

Jeff
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01-16-2006 02:27 AM  13 years ago
tjongkristian

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Jakarta, INDONESIA

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Which one is the best Hatori 3D muffler that is available in Asia? Thanks.
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01-16-2006 09:11 AM  13 years ago
mrNoodles

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Borlänge, Sweden

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I´d get a #521 (or #522 depending on what heli you have) for you OS50 Hyper.
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05-10-2006 07:04 PM  13 years ago
Motions

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Tallahassee, FL

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I'm as lost as I was before. I want to get the 522 because I can get it for $70. Will this work well on the hyper 50? Better than a stock TT muffler?_______
Scott M
Team Mikado USA
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05-10-2006 07:54 PM  13 years ago
Hatoriusa

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Niagara Falls, N.Y

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Hi

Re: 522

The 522 muffler was made for the Asian market..so you are obviously getting this from a grey area. The pipe we reccomend and have tested extensively is the SB-50HP Jason Krause design. It handles much more volume then the 522 ( which we here at Hatoriusa do not distribute in the USA )So if you asking for advice go with the SB-50HP which can only be bought from suppliers in this country. Its good to remember that we stand behind the mufflers we sell for 2 years from date of purchase.

Hatoriusa
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05-10-2006 08:25 PM  13 years ago
mrNoodles

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Borlänge, Sweden

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The 522 muffler was made for the Asian market..so you are obviously getting this from a grey area.
How come eveything outside US is considered as 'grey market'??

Have you tried the #522, and if som did you get it from some grey area?

Also you recommend us living in Europe buying SB-serie mufflers, wont that be grey market for us??
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05-11-2006 01:47 AM  13 years ago
Huskey

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Ball Ground, GA

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AMEN! Mr Noodles
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05-11-2006 02:19 PM  13 years ago
baby_zyklon

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Singapore

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a hatori 522 is definately better than a stock tt muffler. I have the 522, I feel that it holds the rpm a LOT better than the stock tt muffler. Not very evident when you fly smooth aerobatic, but when I bang the stick, it is quite obvious. As for the concern over the rpm that the 522 comes alive being too low and not very suitable for hardcore 3d flying, I can assure you that it is not. I believe sometime back before they released the 521/522 to the market, hirobo had a video that showed the evo doing 3d with it to show the power. In fact, the little piece of paper that came with my hatori 522 states that the optimal rpm for the muffler is 13000-17000. Beyond these rpm, it act as a normal muffler.
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05-12-2006 10:47 PM  13 years ago
Silli

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Finland

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Hi.
Just received Hatori 546

and I am gonna test it against
Zimmerman 3025 what I am currently using on raptor.

There wasn`t any user manual with hatori so coud someone advice rmp range for os50hyper.
shoud I expect difficulties to adjust low and high mixtures with Hatori ?
What is best solution for mounting it to engine for prevent any leaks in future ?

Cheers
Silli
CCPM rules
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05-12-2006 10:49 PM  13 years ago
mrNoodles

rrProfessor

Borlänge, Sweden

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Shouldnt be any problems adjusting the needles.
Ive been using orange hi-temp silicone with good results.
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05-13-2006 01:29 AM  13 years ago
baby_zyklon

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Singapore

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needle setting will vary with the fuel you use and your location( climate, altitude). Keep the rpm between 16500-17000 for 3d, that is the optimum rpm for the hyper. The 546 is a muffler, so it is very easy to tune, just richen the engine a few clicks, then as you fly, lean it out till the optimum setting. It will work just fine in any reasonable rpm, it is more of a tuned muffler than a tuned pipe. For me with the hyper and 522(not too great of a difference from a 546) running 20%nitro at sea level, I am at 1.2turn out on the main. Suggest you start from 1.75turns out and lean it from there accordingly.
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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › An OS Hyper question for HatoriUSA
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