exhaust nt mit os rz

[ferry]

hallo leute
i have a nt with a sz-h motor und hatori 970 .
i also have a os rz -h , and i like to put that on the nt .
now i am looking around for a muffler . i also have a mp xl 91 with a rz and a hatori 938 . that runs very good .
henseleit sells the adaptors so a hatori will fitt the rz , but how about all the other helis that use the rz ? what muffler/exhaust fits the rz engine ?
i cannot find info on that , maybe you guys know this ?
the reason for me to look towards other muffler/exhausts is , that my nt does not need more weight on the front , and maybe , if other mufflers fit , i can find one that has the weight a bit more towards the rear of the helicopter .
o , the reason i want a fixed muffler/exhaust rather then the hatori 970 tuned pipe is , becouse the 970 needs too many times of adjustment with this winter temperatures differences we get the last couple of weeks .
thanks in advance , grub ferry

[CooleSau]

AW: exhaust nt mit os rz

Hello Ferry,

you might use a "Zimmermann"-Muffler. These mufflers are fitting without a adapter. It is possible to mount this muffler directly on the enginge. Also, the Zimmermann-muffler has a better sound then a hatori and also a little more power. BUT you need minimum 10% Nitro!!!

This is the link, where you can order such a muffler:

http://www.zimmermannschalldaempfer.de/shop/index.html

You just have to tell the factory what enginge you are using and they will send you the right one.

Best regards

Coole Sau

Pic:

[Fly-So-High]

AW: exhaust nt mit os rz

.... Also, the Zimmermann-muffler has a better sound then a hatori and also a little more power. BUT you need minimum 10% Nitro!!!

I cant believe that, my engines with the zimmermann only run very hot and not with the power like a hatori.

Marcel

[CooleSau]

AW: exhaust nt mit os rz

@ Fligh so high:

Das kommt ja auch nur vor, wenn man sich nicht richtig mit Motoren auskennt.......(ohne Worte)

[ferry]

AW: exhaust nt mit os rz

ok , but the hatori 938 can do without nitro aswell ?
i run the 10% in the nt and mpxl , and my engine temperatures go up to about 119 degrees in winter [while 3 graten winter]
how about all the deutsche 'ohne nitro'flieger ? what is max temp for the motor without damaging it ?
danke und grub , ferry

[Fly-So-High]

AW: exhaust nt mit os rz

@ Fligh so high:

Das kommt ja auch nur vor, wenn man sich nicht richtig mit Motoren auskennt.......(ohne Worte)

feix - dann klär doch mal auf was ich falsch mache ?

[ferry]

AW: exhaust nt mit os rz

fly-so-high : do you mean that the zimmerman makes the engine hotter then the hatori does ?

with the hatori 938 und os91rz-h und enya#4 und 16% oil und 10%nitro on my mp-xl-v91 , i have the feeling that it runs super in idle 2 [about 2000rpm] but , in idle 1 [about 1800rpm] it is good , but not super . i think that hatori is nur for high rpm und 3d stuff.
im a correct in this ?
with my nt und hatori 970 , i sometimes have the perfect setting for flying with 1850 rpm ; the motor is really quit , smooth and so powerfull , enough power for 3d at only 1850 rpm .
but the next time i go flying the setting is a bit off and the power is gone a bit , aswell as the motor is making more noise .
regards ferry

[CooleSau]

AW: exhaust nt mit os rz

I would use the OS 8 Plug and 15% Cool Power fuel. Then your engine is running very well.


Greetings


Coole Sau

[ferry]

AW: exhaust nt mit os rz

coole sau , you mean my mp setup or the nt setup ?
i have been flying tornado 15% a lot last year , and found that the nt [sz/hatori970] is very critical to tune , with my fuel now [ 10%n 16%oil] it is easyier to tune .

[Fly-So-High]

AW: exhaust nt mit os rz

fly-so-high : do you mean that the zimmerman makes the engine hotter then the hatori does ?

with the hatori 938 und os91rz-h und enya#4 und 16% oil und 10%nitro on my mp-xl-v91 , i have the feeling that it runs super in idle 2 [about 2000rpm] but , in idle 1 [about 1800rpm] it is good , but not super . i think that hatori is nur for high rpm und 3d stuff.
im a correct in this ?
with my nt und hatori 970 , i sometimes have the perfect setting for flying with 1850 rpm ; the motor is really quit , smooth and so powerfull , enough power for 3d at only 1850 rpm .
but the next time i go flying the setting is a bit off and the power is gone a bit , aswell as the motor is making more noise .
regards ferry

Yes in my experience the Zimmermann makes the engine hotter than the hatori.
The Hatori is not only for high rpm but your plug is not good. The enya 4 goes only good if it is very hot in summer - you should use a enya 3 (hotter)plug that goes better (OS A3 or A8 are also good but the enya has a little bit more torque while the engine runs richer). Whit the Hatori 970 i have the same experience, its runs very difficult and not so much better than the Hatori 700 does but the 700 runs in every rpm good.

Greetings Marcel

[ferry]

AW: exhaust nt mit os rz

ok , danke fur die antwort fly-so-high .
so you have the 700 hatori on a nt ? what motor you have and what fuel you use ?

today i flew 4 tanks with no problem , engine plenty-o-power and very , VERY smooth .
but as i meantioned , tomorrow it might run shit [sorry] and sounding like an old vw beatle [hehe] , without changing anything.
i putted in the enya4 when i was having pre- ignition , this was 3 weeks ago when it was freezing -10 here . i try the #3 tomorrow i think.

so you dont have to change the settings a lot and it is not critical with the hatori 700 ?
sounds like that is what i need , a lot cheaper then to convert my sz to rz and buy a 938 and janh adaptor .

grub and danke ferry

[Fly-So-High]

AW: exhaust nt mit os rz

ok , danke fur die antwort fly-so-high .
so you have the 700 hatori on a nt ? what motor you have and what fuel you use ?
today i flew 4 tanks with no problem , engine plenty-o-power and very , VERY smooth .
but as i meantioned , tomorrow it might run shit [sorry] and sounding like an old vw beatle [hehe] , without changing anything.
i putted in the enya4 when i was having pre- ignition , this was 3 weeks ago when it was freezing -10 here . i try the #3 tomorrow i think.
so you dont have to change the settings a lot and it is not critical with the hatori 700 ?
sounds like that is what i need , a lot cheaper then to convert my sz to rz and buy a 938 and janh adaptor .
grub and danke ferry

I had an NT but in the Moment i fly MP XL VL 91. On my NT i used OS 91 SX-H with gear 8,3 and Hatori 700 / 970, fuel was Cool Power 30%. With the Hatori 700 you can fly and must not ever change something - it runs ever good, but if it is very hot it runs a little bit better with the enya 4 plug. The next problem you have is you engine - you use the OS 91 SZ-H *? That makes ever a little trouble because it is the badest OS engine that you can use - this engine runs not very cool with the original crankshaft. I had modified mine and then it runs very soft and cool - i had this engine in my old MP V91 with Hatori 938.

here you can see me and my model flying...

http://www.rcmovie.de/video/f4029513ebf9295e0d34/MHM-2008-Marcel-Adolph

Marcel

[ferry]

AW: exhaust nt mit os rz

yoo marcel , 1 word ;THUNDER!
awesome vid man ! and your heli sounds excactly like mine when it runs good .
my engine is a os91 sz-h-ps hyper , but i took of the pump and put on the normal carb from a rz-h and the curbewelle is a new graupner heim crankshaft for fitting the nt clutch.
i also have the 8,3 gear . you think the hatori 700 is not the solution to my ever-have-to tune the engine ?
regards and thanks ferry

[Fly-So-High]

AW: exhaust nt mit os rz

The Hatori 700 runs realy much better and easyer than the 970. You must not ever tune the engine but the SZ engine normaly runs very hot and after the tuning it runs better - wich crankshaft (from wich engine) do you use now ? I think the carburator from the rz-h should work on your engine. What was your problem with the pump on the engine, because you took it of - normaly the engines with pump run better and with more torque ?

Marcel

[ferry]

AW: exhaust nt mit os rz

ok , originally i bought the nt with a c spec . becouse that engine was gettin old i bought a sx-h pumped hyper . the pump started leakin , so i took of the pump and carb to fit a carb from a rz-h . this makes my engine a normal sz-h , right ?
becouse of the 8 mm heim curbewelle that is needed for the nt clutch i bought this https://shop.graupner.de/webuerp/servlet/AI?ARTN=2711.5 .
i have no vibration problems , also , no heating problems .
also , i cannot fly like you on the video , . . . yet :]
so i like to fly with headspeed of 1800 and sometimes i want 2000 , but not often .
and that is the problem with the 970 , hard to tune if you want 2 or 3 different headspeeds .
first i was thinkin to change the motor to rz-h with hatori 938 , becouse that runs fine on my mp-xl-v91 , i never ever heve tuning problems with that heli , but now i am thinkin of the hatori 700 if you say it is 'set and forget' .
regards ferry