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HomeAircraftHelicopterMain Discussion › Dial Test Indicator
10-11-2005 06:48 AM  12 years agoPost 21
Swashplate

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UK

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Thanks very much. Will order them today. hopefully they should be with me before this weekend.
Damn, I thought engine installation was as simple as bolting it on to engine mount and turn it This was letting me down - My gyro wouldnt hold, I could see vibration in the fins, My muffler would fall in flight.....
Hopefully this should sort it out.

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10-11-2005 06:10 PM  12 years agoPost 22
Jasper7

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Birmingham , UK

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Hi all

Knowing why I need to dial the Fan etc, but not how much it could be off?

Whicvh DTI would be best

Metric 0.8mm travel in 0.01mm increments £21
Metric 0.2mm travel in 0.002mm increments £25

Thanks

Steve

Jasper 7
T-Rex 700N
T-Rex 600N
T-Rex 450Pro

Citizen Number: 00212

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10-11-2005 06:57 PM  12 years agoPost 23
Yug

rrMaster

UK. Herts

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I try to keep any rounout to less than 1thou or 0.025mm

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10-11-2005 07:06 PM  12 years agoPost 24
Jasper7

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Birmingham , UK

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Guy

Would

Metric 0.2mm travel in 0.002mm increments £25

Be my best choice then

Steve

Jasper 7
T-Rex 700N
T-Rex 600N
T-Rex 450Pro

Citizen Number: 00212

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10-11-2005 07:51 PM  12 years agoPost 25
Yug

rrMaster

UK. Herts

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Note sure what you mean by 0.2mm travel.
The one I use shows increments of 0.01mm and has a total plunger range of 1cm, so as I see it, my travel is 10mm.
Your 0.2mm doesn't sound right.
Remember, when you move the plunger upto the surface you wish to measure, it will start off at an arbitary plung depth. see what I mean.

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10-11-2005 08:26 PM  12 years agoPost 26
Swashplate

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UK

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Hey jasper,
I ordered item no 7551108215 on ebay. check this out and bought a magnetic stand all for £35 incl delivery. Not a bad price for what i looked around

DTI spec:
Graduations 0.0005" Reading 0-15-0 Range .030"
Dovetails on top and back for all round movement
Includes 5/32" and 3/8" mounting shanks
Contact point adjustable through 230 deg
Adjustable bezel and dial
Fully jeweled movement

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10-13-2005 06:52 PM  12 years agoPost 27
Swashplate

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UK

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Hello again,
OK i've got the dial test indicator now. Still got to get a vice big enough to fit the engine, which i'll do tommorow.

In the meantime, i would love some tutorial on how and what to do as to check the trueness of the fan hub.
Thanks in advance.

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10-13-2005 11:09 PM  12 years agoPost 28
Swashplate

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UK

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I think, I have worked the logic to find the high point. Now i've run out of ideas to correct it. any help will be much appreciated

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10-13-2005 11:23 PM  12 years agoPost 29
Yug

rrMaster

UK. Herts

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Trial fit fan onto engine, check for runout on the fan flange and the clutch mounting flange wall and end face. Fiddle about remounting the fan until runout is within 1 thou. Finally secure fan once and for all. Mount clutch with bolts done up but not at all tight and gently tap clutch into position for minimum runout. Rotate clutch 180 degrees on fan to find the minimum runout.
All this depends on what sort of fan you are mounting. If it is threaded, there aint much you can do if it is out. If it is QuickUK with a tapered collar, be patient and take your time. Don't forget to remove the carb and stuff a toothbrush down into the hole to lock the crank when doing up fan.

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