Need Help With My Hawk Pro.

[addy005]

I have the Hawk Pro with the OS .37 Engine.. I have it fully assembled but I have hit a doorstop!

The cooling fan keeps popping off when I try and start my motor with the starter. When I re-assemble it I tighten it as much as possible. I am now lost without an answer.

When the fan stays on for a while, my engine does not want to start. Is there some sort of trick?

[WayneBrown]

yep, you need to remove the backplate of the engine and using a nylon or delrin crank lock tool, tighten the hell out of the fan mount.
Until you do this, you are peeing up a rope so to speak, and will have nothing but problems.
Once done, you need to follow the engine manufacturers instructions on engine break-in and find local help.

[addy005]

Okay thanks for the advice. I will definately wait until I get a crankshaft.

[Ray Fernandez]

yep, you need to remove the backplate of the engine and using a nylon or delrin crank lock tool, tighten the hell out of the fan mount.
Until you do this, you are peeing up a rope so to speak, and will have nothing but problems.
Once done, you need to follow the engine manufacturers instructions on engine break-in and find local help.

As Wayne mentioned, you'll need to tighten the nut for the fan. You might want to use some Loctite to get it to stay put. An alternative to the Delrin crank tool, is a small peice of wood. All you will need to do is remove the carbuerator (sic), jam the wood into the crank and tighten the fan nut.

[WayneBrown]

As Wayne mentioned, you'll need to tighten the nut for the fan. You might want to use some Loctite to get it to stay put. An alternative to the Delrin crank tool, is a small peice of wood. All you will need to do is remove the carbuerator (sic), jam the wood into the crank and tighten the fan nut.
a broom handle between the connecting rod and case is safer that sticking something in the carb boss. If you are really desperate, yank off the head, wad up a paper towel and jam in the cylinder, reinstall the head and torque the fan down. remove the paper towel and reinstall the head.
I'd not recommend this method, you can damage the engine by bending or tweaking the connecting rod, DO not under ANY circumstances use the glow hole 'dart' the car guys use to lock the crank. You will out a hole in the piston this way.
Locktite should not be required, but it does add some piece of mind, use the blue stuff, red if thats all you have on hand.
I would rather you be inconvenienced now than to have damaged the engine and be out of pocket later. Having the right tool helps a LOT, however if you use common sense and restraint you should be able to use an alternative method. Remember that you are not working on a tractor, things will bend or break if you tighten it too much.

[JustPlaneChris]

DO not under ANY circumstances use the glow hole 'dart' the car guys use to lock the crank. You will out a hole in the piston this way.Hmm.... I bought (and used) the crankshaft locking tool that Century sells (http://www.centuryheli.com/products/productdetail.htm?currentid=455&prtnm=CN2155), and so far it looks like my piston is without holes. Why would Century sell a tool that would cause catastrophic damage to the engine when used as directed? :confused:

[WayneBrown]

Hmm.... I bought (and used) the crankshaft locking tool that Century sells (http://www.centuryheli.com/products/productdetail.htm?currentid=455&prtnm=CN2155), and so far it looks like my piston is without holes. Why would Century sell a tool that would cause catastrophic damage to the engine when used as directed? :confused:one word: greed.
Why not sell and manufacture something that runs a risk of more sales? Why have tower hobbies as the main distributor of their product when their past supply issues have not been addressed?
Another of life's mysteries. If you got away with it once, consider yourself lucky. Pitch the tool and buy the nylon or delrin one, you won't damage an engine or worry when it will fail again.

[addy005]

Can you guys give me a link to a decent supplier of the tools that are safe? Also I need to balance my blades/swash plate, what should I get? Links would be great!

I admit I tried to push against the piston with an allen wrench, but I'm never doing that again. No damage this time but who knows...

[WayneBrown]

http://www.ronlund.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=heli&Product_Code=JCCLT
just buy good quality blades and bolt them on, the balance will or should be close enough you wont improve on it much.

[addy005]

Will that crankshaft clamp fit an os37? It does not say that it will in the description.

[WayneBrown]

yes, it will fit. the 50 and 37 are interchangeable in a lot of ways, and the backplate is the same opening size.

[odieser]

Hey addy did you get the Hawk flying yet haven't seen anything for a while.
Mark

[addy005]

Hey wassup haha. Nah haven't got it flying yet. Waiting for the piston lock tool and red loctite and some other things to get that baby ready! :clappp

[Fboss38]

All you need to balance blades is a bolt to bolt them together and 2 glasses to act as a piviot. If you want to bother with the CG thing you can but you dont need to. Flame suit on I know some dis agreement will be forthcoming but I have always done it this way, never bothered with CG and my baby flys great, no vibes.

[LockMD]

Flame suit on I know some dis agreement will be forthcoming but I have always done it this way, never bothered with CG and my baby flys great, no vibes.

:flamedevil

J/K I agree with you, that's all I've ever done too...