Another setback for my JAE 21FE

[JohnZ]

In my ongoing attempt to finish this boat, I have encountered another glitch. This time with the strut. The stuffing tube is supposed to fit into the strut and set back 1/4" from the rear. The Stuffing tube would not fit in the hole drilled in the strut as the hole was 1/32" to small. I redrilled it with a 1/4" bit and the tube fits albeit very snug as in just fits.
Now for some of you machinists out there should I leave it at that or should I drill it out to 17/64" or use a slightly smaller bit such as an F or G size?

[grsboats]

The stuffing box needs to slide inside the strut for angle adjustments so if it is very snug you won't be able to do that.Gill

[oscarel]

Isn't JAE pretty much set and forget for strut adjustment? Should be flat on ski.

[Fluid]

As Oscar says, the JAE is plug and play. No strut adjustment, just experiment with CG and props - or not. The strut needs to be hard against the inside of the aft end of the ski and dead flat. Lifting props are not needed since the ski provides both lift and a solid aoa for the hull.

My JAE 21FE uses the factory Z strut, and I have never adjusted it. On 4S and a Castle 1415/1Y spinning a cupped H-7 it turns 12 second laps in race water at up to the mid-70s. Uses about 3000 mAh for six laps and a mill, so it is pretty light on the water. Don't give up, it is a very fun and fast boat.


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[JohnZ]

But....what size drill do I need to open up the stuffing tube hole in the strut?

[martin]

Don't know whats going on here re the hole in your strut, but the stock Zipp 21 strut that I have is bored 1/4". A K&S 1/4" o/d brass tube is a nice slide in fit into the strut. if you need to drill yours out, drill it 1/4".

[oscarel]

If it doesnt fit, sand down the stuufing tube.

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[Fluid]

I think that a photo would be helpful.


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[JohnZ]

I drilled out the strut to accept the tube with a .250 drill and it was still a bit too tight. I then called Zipp kits and talked with the owner about this. He told after the strut was drilled it was then reamed with a .2520 reamer to get it to the dimension that would allow the stuffing tube to be installed. I checked with McMaster-Carr for reamers the correct one was nearly $18.00 for which I am not prepared to spend the money on.
They, Zipp Kits, are sending me a new strut.

[oscarel]

Why not sand the stuffing tube?

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