Newbie Questions! installing OS55 on TTX50

[dards]

Hi,

I am building my first heli, it is Thunder Tiger X50. I have already assembled the head and now working on the main body. Its time to install the engine, here are my questions...

1- I should NOT use the crankshaft washer that came with my OS 55Hyper and should put the fan on the engine shat without it?

2- I will have to take out the back plate and use a toothbrush to lock the crankshaft at TDC then tighten the fan. Should I use threadloack on the shaft and fan?

3- Should I use threadlock for the crankshaft bolt?

anyother thing I need to be careful about at this stage of assembly?

Is there any build thread or video on ThunderTiger X50?

Thanks in advance!

/Dard
www.rcpak.com (http://www.rcpak.com)

[guitarherowanab]

definately use thread lock on all metal to metal screws/surfaces, especially in the engine. i cant tell you anything specifically about this heli, other than it looks sweet from what ive seen of it! keep posted on the build...take it slow and ask questions..

good luck



rob

[fritzthecat]

1 - No washer
2 - No threadlock on the fan. Lightly oil the part of the crankshaft where the fan screws on.
3 - Yes, threadlock on the crankshaft nut. Don't hold the fan when tightening the nut.

Fritz

[Raptor30_V1]

Hello,

I don't know, what your experience/ skills with nitro-engines are, but to use an OS-55 as a newbie (honestly) is a bad choice because engine tuning will be more painfull . Today's latest nitro helicopter builts get ever lighter and this means an OS-50 is still a very powerfull - but way easier - engine?

Most people having a 3-needle carb and discussing how to tune the needles.. have no clou about that .. so, considering you bought an OS-55 (don't get me wrong, it's a good engine - except the metal bearing cage), find yourself an experienced buddy helping you to tune especially the main needle:thumbup:

Sure, 90' size engines have 3-needles, but it's fact, the bigger the displacement, the easier to tune an engine (anyway). My post is not to scare you, but to tell you to find advice/ support by skilled people. The +10% increase in displacement are a good example that some companies develop far around what 80% of people need :arggg:

So once again, don't be scared, but search advice by experienced people. I know about engine tuning, but honestly it's pretty difficult to explain to a newbie how to tune an OS-55, meanwhile explaining a someone how to tune an OS-50 is cake .. :hug:

Best Regards,
Oliver

P.S: On our flying field most novices choose the OS-50.. it's very easy to tune and as well very easy to xplain to anyone how to tune the needles, especially when you use a temp monitor. Sure. Some people will say, no problem to tune an OS-55, funningly the web is over-loaded with people asking what the middle needle is for and how to tune it?

[dards]

Hi

Thanks everyone for replying!

This is what I did!
Engine main shaft -> Fan hub+fan -> washer (that came with the engine) -> main shaft nut (came with the engine)

Raptor30_V1, thanks for your advice, though I am new to the nitro helis and nitro heli engines but I am NOT new to the nitro engines all together. Used them for about 3 years on planes before switching to petrol engines.

The next step is choosing the battery regulator! I will be using the following electronics

Futaba 6008HS receiver.
Futaba BLS541 cyclic servos
Futaba gy520 gyro with JR 8900 tail servo

Any recommendations on the regulator??

Regards

/Dard
www.rcpak.com

[Raptor30_V1]

Hello,

There are many different regulators that work fine. At the high-end (price) you will find a SG Reactor-X and at a cheaper (fair) price you can buy a Perfect-regulator 6V/ 5V (for the tail) for about USD 39.- ..

I use 3 Perfect-regulators 6V/ 5V but you can have this regulators as well for higher Volts and even adjustaeble. Up to now I'm very happy with my regulators, no glitches/ brownies etc. .. just working fine :thumbup:

Best Regards,
Oliver

P.S: Tuning a plane-nitro is not the same as a heli-nitro-engine. :confused:

[carlos]

Dards.
The X50 and OS 55 are a very powerfull combination. I suggest you go easy on the collective range. Maybe max 11 deg to start with, I am running 13deg with 620mm blades and with the engine tuned properly the machine goes WAY harder than any other machine I own or have had. Power is good but to much and you can get into trouble real quick. Kind of like learning to drive in a 500+hp Car.