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HelicopterAlignT-REX 600N › Metal cooling fan or not?
07-13-2008 04:52 PM  9 years agoPost 1
trexflyer2003

rrVeteran

northridge ca,91324

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Hi,

1)What is the advantage to have metal cooling fan?

I burned the clutch yesterday

2)How would you change the clutch liner? I peeled out the old liner but still alot remainning. Would you use sand paper to sand it all the way down to metal before putting the new liner on?

Thanks

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07-13-2008 07:42 PM  9 years agoPost 2
swasey1982

rrApprentice

La Ceiba, Honduras

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the metal fan does not provide a better performance, just bling in my mind, you burned your clutch?, was this because of a chicken dance or something? How did you burn it?, I have always been able to remove clutch liners with my hobby knife, try heating it a little to remove the liner, they are epoxied on. Don´t use too much when gluing back a new liner, just a little film on the clutch is enough.

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07-13-2008 08:27 PM  9 years agoPost 3
kodiak24

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Corvallis, Or

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I have 2 Trex600N pro kits, i am using the stock fan on one of them, I am building my second one I was going to use the metal fan, but since I have never had a issue with the cooling I am going to just use the stock fan. On all my other heli's I have had, which I have been flying heli's for years even on my raptors I have had I have used the stock fan.

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07-13-2008 08:37 PM  9 years agoPost 4
trexflyer2003

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northridge ca,91324

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I removed engine to find out why gov sensor did not work when i put engine back I accentially had max throttle position in min servo then you can guess what happened. I had hotstart. luckily, i hold rotor blade very well until somebody removed the supply fuel tube and the engine stopped. I smelled something burning. OK I went flying again and found out no power at all. went to hobby shop bought metal fan new clutch and clutch liner. I lost 1 magnet on the plastic fan. I put new clutch and fan on and It flew nicely again. I'd like to change clutch liner in the old clutch bell for spare.

I am so new to nitro that I make so many simple mistakes.

So, I need epoxy to put the new clutch liner on. what kind of epoxy do I need?

Thanks for respond

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07-13-2008 08:54 PM  9 years agoPost 5
nappyroots2182

rrElite Veteran

Moline, il

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i use 30min epoxy so you have time to get it in and excess glue cleaned off. i use a old photograph and wrap it around the clutch one time with no overlap then push it and the clutch into the bell. this sets a nice gap. if you dont and just let the glue dry it will expand when drying and you will not have a proper gap. jus tthe way i do it

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07-13-2008 09:06 PM  9 years agoPost 6
JC Aguilar

rrNovice

Panama, Panama

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I flew my 600N with the plastic fan for a while, and later moved to the alluminum. It made no difference at all, it engine pulled the same and no changes to the carb neddles.

The only diffrent i would say, is that the gov magnet will have a better grip on the alluminum one. But if you properly glue it, there is no need to move to the alluminum fan.

On the cluth liner, just remove it using an hobby knife and sand the bell. You can epoxy (30 min or JB weld) the new liner with a very thin layer. Make sure that when installing it you place the liner in the bell before you glue it to the bell wall, so you do not squize the epoxy.

JC

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07-13-2008 09:24 PM  9 years agoPost 7
shuttlepilot

rrElite Veteran

Mullins, South​Carolina

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I've never really seen a significant cooling advantage of having a metal fan. The thing that I noticed most with my metal cnc fans that I have used in various models was that they balanced better and had better runout. I wouldn't say that all metal fans are this way, but the variety that I have used were better in that respect.

Gas is Great
Camper Fuel is Better!!
QWW Helis

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07-13-2008 09:24 PM  9 years agoPost 8
trexflyer2003

rrVeteran

northridge ca,91324

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Did you guys have to sand the inside of the bell all the way until you see aluminium?

You are so right about the aluminium fan. I dont see any difference. but it holds magnets much better than plastic one.

Thanks

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07-13-2008 09:30 PM  9 years agoPost 9
JC Aguilar

rrNovice

Panama, Panama

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Yes, I just sand with san paper the bell to remove any remaining glue on the bell, (that will give you a better grip to your new liner). Then, clean it with alcohol and you ar set to place your new liner.

JC

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07-13-2008 10:06 PM  9 years agoPost 10
trexflyer2003

rrVeteran

northridge ca,91324

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Thankyou all.

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07-13-2008 10:27 PM  9 years agoPost 11
Buzzin Brian

rrProfessor

College Station,​Texas

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Actually I have always preffered a metal fan for a few reasons. There is little risk of it flexing and pitching the magnet or hitting the sensor. Epoxy sitcks to it better which of course helps keep the governor magnet in place. A "well made" CNC fan will usually ballance pretty well. And I have never accidentaly broken a fin off of an aluminum fan. Plus I have just always been a sucker for bling!

Build it, fly it, crash it. Repeat as often as needed.

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07-13-2008 11:53 PM  9 years agoPost 12
swasey1982

rrApprentice

La Ceiba, Honduras

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ohh bling is good

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