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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › metal fan stuck on os 50 hyper
02-02-2010 02:44 PM  8 years agoPost 1
jimsim

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england

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has anyone got any tips on getting a century hawk 50 metal fan of os 50 hyper engine. the fan looks like its in two pieces ive tried to unscrew the top piece but its real tight any advice will be much apprieciated cheers

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02-02-2010 03:45 PM  8 years agoPost 2
canbarelyhover

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Sunnyvale, CA

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the metal fans are usually threaded backwards

Citizen #830

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02-02-2010 07:46 PM  8 years agoPost 3
rotormonkey

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Ottawa, ON - Canada

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Yup, they're threaded in reverse, so you'll need to turn it clockwise to loosen it. Also, since there really isn't anywhere to get a good grip on it, I've always just applied a bunch of heat (via a heat gun) to make the loctite let go easier. If you're lucky, you can take it off with a cloth and your hands. If not, I've been known to move on by marring the crap out of it with vice grips.

Good luck. That metal fan is a PITA

If it can't hover, it ain't worth flying.

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02-02-2010 08:24 PM  8 years agoPost 4
jimsim

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england

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is it in two pieces if so do i unscrew the top piece or do i unscrew the whole fan

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02-02-2010 08:35 PM  8 years agoPost 5
rotormonkey

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Ottawa, ON - Canada

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Yes, it's in two pieces. You need to unscrew the top part first. That will reveal a nut on the crankshaft of the motor which comes off next. After that, you unscrew the clutch if you want that off, or just pull the fan out of the clutch shoe.

Note that the fins are part of the bottom part of the fan, not the top.

If it can't hover, it ain't worth flying.

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02-02-2010 08:46 PM  8 years agoPost 6
jimsim

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england

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cheers i bought the engine second hand for a raptor so i will be taking the clutch off as well

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02-02-2010 08:48 PM  8 years agoPost 7
rotormonkey

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Ottawa, ON - Canada

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OR since you already have the fan and clutch bell on there, you could buy a Hawk to go with it. Just an idea

If it can't hover, it ain't worth flying.

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02-02-2010 08:56 PM  8 years agoPost 8
jimsim

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england

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cant seem to budge it by heating and unscrewing with table cloth iv'e not got a vice to hold and beat it

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02-02-2010 09:59 PM  8 years agoPost 9
Dilbeck

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Springdale Arkansas

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Many people have used loctite on these and found it near impossible to separate the 2, there is nothing to grab on to and if not careful you will break off a fan. I used 2 of those small rubber (Looks like a oil filter remover) ratchet like tools i got from auto zone. I never locktited this fan again and it still took incredible force to remove it. The new updated fan has a built in nut so you have something to grip on to. Thank you Century!:cool
http://www.heli-world.com/detail.aspx?ID=9461

Clint

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02-02-2010 10:05 PM  8 years agoPost 10
rotormonkey

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Ottawa, ON - Canada

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Just to be clear, you'll need to heat it up to the point that it'll burn you to touch the metal for long. At least that's what I've done, and found good results. Generally I still can't just take it off with a cloth either. The cloth comes in handy once you've already removed the top part to get the clutch off.

I think the only way you'll likely get it off is with heat, vice grips or some sort of tool with teeth to bite into the metal, and a whole lot of swearing.

At least that's usually how it goes for me.

If it can't hover, it ain't worth flying.

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02-02-2010 10:06 PM  8 years agoPost 11
MikeInMobile

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Mobile, Alabama

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If it has Locktite green on the threads, dribble a little acetone onto the threads and wait for 40 seconds. The acetone will penetrate the threads and release the locktite's bond.

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02-02-2010 10:08 PM  8 years agoPost 12
rotormonkey

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Ottawa, ON - Canada

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If you've seen the design of this fan, you know that it'll be just shy of impossible to get acetone into the threads. He'd have to get past the fan fins, and to the "hub" in between. Short of soaking it, I don't see how to get any in there..

If it can't hover, it ain't worth flying.

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02-02-2010 10:10 PM  8 years agoPost 13
MikeInMobile

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Mobile, Alabama

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I use a syringe to apply the acetone. Works well, and is easily doable!

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02-04-2010 01:30 AM  8 years agoPost 14
jimsim

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england

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it's off i heated it up stuck a screwdriver in the fan vents then used a screwdriver and hammer to beat the top piece off worked a treat

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