RunRyder - Getting that Fan tight enough on the Engine.

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 521 ONLINE 45 EVENTS SEARCH REGISTER START HERE

1 page

763 views

POST REPLY

Ace Hobby	.	Esprit Model	.	Thunder Power RC
	.		.

Synergy R/C Synergy N9 > Getting that Fan tight enough on the Engine.

AnnihilaT
Key Veteran
Location: The Netherlands Force: The Dark Side

Ok assuming you have no special tools and dont want to wait to get them before you mount your fan to your engine, does anyone know of a safe method to get the fan torqued down tight enough that it wont slip when trying to start the a brand new OS91?

Here are the tools im missing:

something to lock the piston in the engine
a thin walled socket for the nut

A day without sunshine is like, well, night.

08-21-2006 Over year old.

HOMEPAGE

valerko
Veteran
Location: ny,dutches county

you just spent 1k for the heli ,what's another 30bucks for few tools

08-21-2006 Over year old.

AnnihilaT
Key Veteran
Location: The Netherlands Force: The Dark Side

haha

No, No.... You dont get it

I just spent 1k for the heli and I WANT TO FLY IT NOW! haha

Stores are not open and i want it ready for tomorrow morning and thats the only thing left to do. Money is not the issue. My impatience to feel how this thing flies is

A day without sunshine is like, well, night.

08-21-2006 Over year old.

HOMEPAGE

frankg11
Veteran
Location: Bellevue, WA

There have been many suggestions on how to lock down the piston so you can tighten the lock nut.

The old piston lock idea.

The old take of the cylinder head and stuff the cavity with a small rag or something and put the head back on.

Stuff a toothbrush into the exhaust port to jam the cylinder.

Or wait until tomorrow and get the right tool. Assemble the whole bird without the engine in it. It only takes about 5 minutes to put the motor in. Do it right and wait on the motor/fan/clutch assembly until the very end. Really I can pull the motor in my Synergy in about 5-7 minutes and it goes back in the same amount of time.

Enjoy the build and enjoy the heli. To much haste and you will be dissapointed.

08-21-2006 Over year old.

j5coat
Veteran
Location: Phoenix

In a pinch

you can make a crank lock out of a piece of pvc coupler, not sure what size as we did it for the rappy 50 but it works.

Trex 700, Trex 600n

08-21-2006 Over year old.

AnnihilaT
Key Veteran
Location: The Netherlands Force: The Dark Side

Thanks for the tips guys! Hadnt thought of those two mehtods for locking the piston. The bird is built already and good to go but the fan came loose from the high compression on the brand new OS91 combined with the fact that i was probably a bit conservative on torquing down the nut because i used the tooth brush thru the exhaust method the first time and didnt want to damage the piston. Nut isnt loose but the fan is slipping on the brass collet which tells me my loctite is working but i need to to torque it down considerably more than i did the first time.

One more thing, Havent had to take an engine apart yet (new to nitro). What do i need to know about taking the head off and putting it back on. Do you need to use a torque wrench to evenly torque each bolt on the head? Do you need to loctite it with the high temp stuff? Are there any first time noobie mistakes i need to lookout for during the disassemble and re-assemble process?

A day without sunshine is like, well, night.

08-21-2006 Over year old.

HOMEPAGE

j5coat
Veteran
Location: Phoenix

if you use a cranklock you have to take off the backplate, which is 4 bolts, and no you dont use locktight when you put them back on. i just retighten them fairly tight but not to tight. make sure you dont loose the thin gasket thats on there, will be stuck to one side, probably on the backplate. insert the cranklock and tighten down your nut, then replace the backplate. easy as that.

Trex 700, Trex 600n

08-21-2006 Over year old.

cdrking
Elite Veteran
Location: Seattle

Quote

8/17/2006 15:38 PM

Some guys are having a problem installing the torque tube. It was made to be a tight fit intentionally. Spraying the O rings and the inside of the boom with WD40 will make the installation go a lot easier. You want the lubricant in the boom ahead of the O rings as you push it in. You can also spray a little on the connectors. Do this and installing the torque tube becomes a piece of cake.

Another issue that has come up in a couple instances is the engine collet could be defective and dial indicating the engine shows too much run out. If this is the case, try making the slot in the collet a little wider using a thin Dremel cutoff wheel. If that doesn't improve the run out dramatically, call Todd and he will send you a new collet right away. If you do make the slot wider, be sure to trim any burrs from the inside of the collet before reinstalling it.

More kits are in the country, but Customs has them at Chicago O'Hare. Customs admits that the kits should not have been stopped, but now that they have, we have to go through the procedure to get them cleared. It should only take a few days. It's always a joy dealing with U.S. Customs. I don't envy them in their job! They are good folks dealing with ever changing regulations.

Keep this in mind when looking at the engine collets. Some have been machined incorrectly and need to be slotted. Just use a dremel and enlarge the collet opening.

Jeff

To hover is divine, the alternative is rather PLANE.

08-22-2006 Over year old.

Peefor
Veteran
Location: St Albans UK

Quote
on torquing down the nut because i used the tooth brush thru the exhaust method the first time and didnt want to damage the piston

That's a very easy way to wreck a perfectly good engine. A toothbrush into the crank after removing the carb is not quite so bad, but a crankcase lock is best -

Pete

08-22-2006 Over year old.

AnnihilaT
Key Veteran
Location: The Netherlands Force: The Dark Side

I ended up using the toothbrush in the crankshaft thru the carb opening method which worked out fine. Ran a full gallon thru the engine yesterday and each flight got better and better. Also finally had the engine apart and back together and now im not an engine virgin and the magic is gone

Surprisingly simple little machines, these little 2 strokes

On another note, i did not dial indicate anything. Just put it together carefully being sure to torque each bolt down with equal pressure and surprise! - no vibes at 1850 in idle2. Fuel in the tank is completely level and calm. Dont know if i just got lucky but I have once again escaped buying a dial indicator and learning how to use it. Like everything else, i will wait until i have an issue before i learn to do this. I also talked to alot of competition fliers here in Europe and most of them do not do this at all and do not notice any ill effects.

A day without sunshine is like, well, night.

08-24-2006 Over year old.

HOMEPAGE

ronlund
Senior Heliman
Location: Corpus Christi, TX

Annihila T

You really dodged a couple bullets. I'm sure glad you didn't really put a lot of torque on it while you had a toothbrush in the exhaust port. That's a really good way to screw up a piston. Sticking it in the intake is almost as bad, but not quite. Either way could result in the toothbrush handle getting sheared off or worse.

Without a cranklock, the best way to do it is to remove the backplate and stick a small plastic screwdriver handle (or a toothbrush handle) in so it is between the crank pin/connecting rod and the crankcase. It's a really good idea to give the crank a good rap on the back end to make sure it's all the way forward before you tighten down on the nut.

I'm glad your engine is running good. If you start to see the fuel jumping around in the tank, check you needle settings. A couple clicks can make a huge difference and as the engine breaks in, you can count on it changing.

Ron

08-24-2006 Over year old.

HOMEPAGE

AnnihilaT
Key Veteran
Location: The Netherlands Force: The Dark Side

Ron,

You misunderstood. I didnt run the toothbrush in the exhaust. I took off the carb and stuck it down into the crankshaft where the hole is for fuel intake from the carb. This is made out of much harder metal than the piston. But yes, i did get lucky in my impatience to get this thing in the air. I have proper tools on order for the next time and will fo things without so much improvising in the future.

A day without sunshine is like, well, night.

08-24-2006 Over year old.

HOMEPAGE

1 page

763 views

POST REPLY

Real Raptors	.	Mikado Modellhubschrauber	.	GrandRC
	.		.

Synergy R/C Synergy N9 > Getting that Fan tight enough on the Engine.

UPDATE SCREEN PRINT TOPIC

Advertisers

Subscribe to This Topic