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HelicopterThunder TigerOther › Checking runout on a TT fan and Adjusting
12-01-2005 04:39 PM  12 years agoPost 1
55crownvic

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Colorado Springs

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How is that possible, because there is no way to adjust the runout, the fan screws on tight. The only way I can see is to buy an aftermarket fan with the collets.

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12-01-2005 04:44 PM  12 years agoPost 2
rkeith2

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Norco, CA

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Shims?


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12-01-2005 05:10 PM  12 years agoPost 3
AzHyper

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Peoria, Az.

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There's not much you can do to adjust the runout on a screw-on fan. However, check the runout of the clutch shoes once bolted onto the fan, then bolt the shoes on 180* opposite and check again. You may find the holes are not drilled exactly and one way is truer than the other.

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12-01-2005 05:47 PM  12 years agoPost 4
Al Magaloff

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Yes, there are ways! First, have you looked at the crank? Where are you checking the fan, and how far is it out?

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12-01-2005 06:37 PM  12 years agoPost 5
55crownvic

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Colorado Springs

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Al

I havent checked anything yet. The motor is still in the heli, and I ordered a fan from Heliproz. The mechs are in my Hughes 500 (50 size) and the stupid "T" tail vibrates. So I did take it all apart and balanced the current fan and clutch and clutch bell, thinking that would solve the prob but it seemed to not do a thing for it. I couldn't tell any difference. So when I was balancing the fan I noticed it was kinda oblong, thats why I have a new fan on the way. Its the upgrade CNC 2-piece fan at Heliproz. I think with that fan, being two pieces, it might be easy to get it dialed in by turning the pieces and rebolting it together.

The blades are balanced, the entire head is balanced and the tail is balanced. The engine runs great and seems to be tuned just right, so I am about to run out of ideas on the tail shake. Am thinking of making the "T" out of a stronger, more rigid material.

When I take it all apart again I will check runout on the crank, BUT how do you deal with runout on a crank?

Dave

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12-01-2005 07:02 PM  12 years agoPost 6
BarracudaHockey

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Jacksonville FL

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Did you check in the scale forum with Coptor Doctor he usually has a ton of ideas on things like that.

Andy
AMA 77227
http://www.jaxrc.com

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12-01-2005 07:05 PM  12 years agoPost 7
AzHyper

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Peoria, Az.

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Cmon Al, don't keep us waiting...inquiring minds want to know!

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12-01-2005 11:32 PM  12 years agoPost 8
Al Magaloff

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Cog, there is no blanket answer. We need more info from 55crownvic( geesh, when are you guys going to use your names?). 55, yes the stock fans are junk. Get the new one, and let us know what you see.

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12-02-2005 02:20 AM  12 years agoPost 9
55crownvic

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Colorado Springs

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Al

Will let you know when I get it!

Dave......(real name)

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12-02-2005 02:53 AM  12 years agoPost 10
Al Magaloff

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I'll be looking for you Dave.

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12-02-2005 05:02 AM  12 years agoPost 11
pistole

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Heli Land ....

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.
.
for your tail shake with the scale-body , perhaps you could
run a lower headspeed.
.
.

Rap70. TT70.Rap50. TT50.RD8000.

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12-02-2005 05:25 AM  12 years agoPost 12
55crownvic

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Colorado Springs

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pistole

Yeah, I'll try that, although I have tried some lower head speed but maybe it wasn't slow enough. I keep thinking that even though the fan is balanced, maybe being "oblong" is what is causing the vibes. Wont have the new fan till next week sometime. This is a bad time of year to have to order parts.

Dave

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12-02-2005 05:29 AM  12 years agoPost 13
ESWLFSE

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Liberty Hill, TX

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How do the TT metal fans compare to the others? The first one I ordered is two-piece black and siver and the blades are open on top. I believe it was a Mavvrik? The last one I ordered ended up being a TT metal fan, one-piece, and the blades were closed with a ring on top.

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12-02-2005 05:40 AM  12 years agoPost 14
55crownvic

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Colorado Springs

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Altimat

The two piece fan you got----did it screw on like the original, or did it come with tapered collets?

Did it provide better cooling?

Dave

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12-02-2005 05:51 AM  12 years agoPost 15
ESWLFSE

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Liberty Hill, TX

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They both screw on. I'm sure they have to provide better cooling, but I replaced the stock one right away on my first used R60 since it was coming loose from its hub. So I never actually flew with a stock fan.

One thing I did notice is that the bore on the two-piece one was a hair too small to fit over the non-threaded portion of the OS crankshaft and I had to open that up a little.

The one piece TT metal fan fit perfectly but it did not have the recessed area on the clutch mounting face for the shoes to move freely. So I had to mark that area and remove a little material.

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12-02-2005 06:39 AM  12 years agoPost 16
pistole

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Heli Land ....

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.
hi CrownVic,

you're asking for the MD500 body on your R50 right ?

I am currently putting on the TT MD500 scale body onto my
R70 and I noticed that you've got one in your Gallery too.

Also noticed that you were unable to locate the lower body mounting
holes exactly between the windows .... I can't either with my MD500,
it is a problem ?

How does she fly ?

Thanks.
.
.

Rap70. TT70.Rap50. TT50.RD8000.

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12-02-2005 09:39 AM  12 years agoPost 17
Al Magaloff

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I've found the TT fans to set-up the best. The QuickUK collet type fans have always required too much work to even approach setting up close. Most times, if you leave out the collet, the fan will set up closer. I've never been a fan of anything Mavvrik, but let's hope for the best , for Dave's sake!
TT metal fan fit perfectly but it did not have the recessed area on the clutch mounting face
This was a "fix" for a problem that does not exist, and really isn't needed.

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12-02-2005 02:43 PM  12 years agoPost 18
55crownvic

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Colorado Springs

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pistole

The fuse I am messing with now is the Century/Funkey 50 size.

I did have the TTMD500 and it had the R60 mechs. That bird flew very nice and looked soooo cool in the air! Especially when I turned it toward myself, it looked like it could fire from those missile pods at any moment! I have since sold it tho. It was just too big to haul around, and I wanted one a tad smaller-enter the 50 size. When building the TTMD500, you just need to install the mechs to your own taste and dont worry about what the manual says. Also I removed about 3/8 to 1/2 inch from the side mount aluminum, because they made the body bulge out too much.

Al,
For what they want for that fan I sure hope it wasn't a mistake to get it. I think it is a Mavrik fan. Oh well, we will see!

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HelicopterThunder TigerOther › Checking runout on a TT fan and Adjusting
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