Dail the fan

[Helodad]

Ok soon to be new Fury extreme owner do I really have to dial the fan, I looking at a good 35-40 dollars to get the set up and I was going to get other tools for the helo instead will I really see any Dif if I don’t?

[capebob]

Did you read the sticky? http://www.helifreak.com/about1417.html

I have never not dialed my fan, but others say that it makes a big difference particularly when it comes to Delrin ball and clutch dampener maintenance.


Bob

[Helodad]

Yes I read the post, I just wanted to know if people don't dial If an intemidiate pilot would see any diferance?

[WayneBrown]

any vibration with G10 and carbon frames is not the best idea.. spend the coin and get the gear.

[mevigavant]

It does make the difference. I noticed it in my heli before dialing and after dialing.. It will sound sooo much sweeter too. The added vibes will add to the wear and tear of your equipment. I also balance my fans although I'm noticeing a huge difference in results depending on the equipment that I use. I've noticed that no matter what I use there is always some drag in the units.. which blows big time if you trying to get it as accurate as possible.

[3DME]

Hello

I agree with Mevigavant, dial and balance the fan. Those high freq vibes have been known to damage lots of things including radio equipment. When I first read"sticky" I did not understand why DavidH takes the piston and sleeve out. But the first time I dial indicated the fan I quickly found out why, but I was still too lazy to remove the piston and sleeve. It helps a little if you turn the motor over by hand with a socket on the crank nut.

Mike

[Helodad]

I thought the new kits use a key fan Assy so I dont know if you can Dial? If the hub assy fits over a ket antghighten down with a nut why would there be run out?

[3DME]

Hello

The MA helicopters do not use a key. They use a double collet system. The DavidH / Ben Minor method keeps the fan centered while tightening the crank nut.

Mike

[DavidH]

You can install the MA fan without dial indicating it if that is what you prefer. You may get lucky and install the fan and the runout be less than .002.
My method is that I install the fan just like I am going to run it. Then I take the dial indicator and check the runout. If the runout is .001 or less, then I leave it alone. If it is more then I loosen the nut and start getting it all align.

In the several years I have been using the double collet MA fans, I have installed a few that I did not have to do anything with. But I have installed some that were out several thousands. It is all about getting the fan seated on the collets in the correct position to get an acceptable runout.
When a fan's runout is several thousands of an inch. The engine will vibrate when turning 14K plus rpm. This will start destroying parts on the model.


David

[Helodad]

Good point David. I will spend the cash and get the equipment. Can you think of any thing else I could a dial indicator on in Assembly?

[mevigavant]

get a good dial indicator dn't go cheap here. Mitituyo(sp) makes really good units. That is all that we used at my old job. as far as balancing, i'm still trying to figure out a way to do it and get consistant results. I'm going to try the two ice blocks and see if that helps.

[EricLarson]

I just use a .0005 indicator from Enco that was about $40. Seems to work ok. I also have a magnetic base that mounts to my vise and the motor in the jaws of the vice works out well.

I just use a standard high point for fan balance.

[WillJames]

Dialing and balancing the fan does make a big difference. Check our video forum for Shannon's Machines. He balances the fan to ungodly RPM using Ice Blocks and a clutch shaft using compressed air to spin them up. He then dials them and his machiens are SUPER SILKY Smooth. Made a believer out of me.