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Posted

For those of you who have installed a Skytec starter for the Prestolite starter on a J, what value did you use for the distance from the datum for you W&B calculation? I’m getting -24.5” and would like to compare that to others. I’ll admit to not finding the actual balance point of the starter before installing it, and I’m surely not going to remove it just to figure that out now.

TIA

Chuck

Posted
1 hour ago, N201MKTurbo said:

Is that what your tape measure says?

It’s more of a question of where to measure “from” on the starter. Since it’s rather long, it could be +/- 4” or so, depending on where the person picks to be the CG of the starter. 

Posted (edited)

-24.5 is what the manual has:

 

Electrical Equipment

301. Alternators

(a) Alternator, 60 amp, Prestolite, ALY8420, ALY8403, ALY6420 or ALY8420M (S/N 24-0001 thru 24-2999)  10.3 lbs. -24.5

(b) Alternator, 70 amp, Prestolite, ALU6421-LS (S/N 24-3000 and on) 10.3 lbs. -24.5

 

Edited by Paul Thomas
Posted (edited)
31 minutes ago, Paul Thomas said:

-24.5 is what the manual has:

 

Electrical Equipment

301. Alternators

(a) Alternator, 60 amp, Prestolite, ALY8420, ALY8403, ALY6420 or ALY8420M (S/N 24-0001 thru 24-2999)  10.3 lbs. -24.5

(b) Alternator, 70 amp, Prestolite, ALU6421-LS (S/N 24-3000 and on) 10.3 lbs. -24.5

 

Even a blind squirrel finds a nut every now and then. What manual is this from?

Thanks!

Edited by RoundTwo
Posted

I thought the question was about the starter? That document is the FAA TCDS (Type certificate data sheet).

It lists the original prestoline/prestolite starter as Flight Station (F.S.) -23.0
46c3006bb5a000cc3c610b1c8d3b232c.jpg

Posted (edited)
3 minutes ago, Scottknoll said:

I thought the question was about the starter? That document is the FAA TCDS (Type certificate data sheet).

It lists the original prestoline/prestolite starter as Flight Station (F.S.) -23.0
46c3006bb5a000cc3c610b1c8d3b232c.jpg

Yes, my initial excitement was quelled after I looked more closely and saw it only had alternator. 

Edited by RoundTwo
Posted
2 hours ago, Scottknoll said:

I thought the question was about the starter? That document is the FAA TCDS (Type certificate data sheet).

It lists the original prestoline/prestolite starter as Flight Station (F.S.) -23.0
 

You're correct, I'm not sure why I provided info for the alternators.

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