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[essex2visuvesi]

how do you guys make the holes in your hull for the propshaft?

using a drill i cant get the correct angle as the chuck hits the hull.

[rmaddock]

A small pilot hole at what angle you can then open it up with a needle file......that'd be my guess.

[andyn]

I use a dremel cutting wheel to open a slot undersize to the propshaft, then a round file to open the slot to exactly the size I want it, Then resin and mat to secure it.

Others open the slot way oversize and fill the hole with car body filler. I really don't see why, you make so much extra work for yourself...

[ACTion]

Drill a hole the correct diameter vertically into the hull, then use a rat-tail file to open out the hole into the right-shaped ellipse i.e. gradually making the hole a shallower angle as you work the file. If the hole is in the back of a skeg then drill the largest hole you can without damaging the hull and open it out with the rat-tail file or files.
DM

[chingdevil]

I use long series drills untill I am very close to the size I want  then file it out.


Brian

[essex2visuvesi]

  easy when you know how!

Cheers guys!

Off to find a 6mm rat tail file now!

[DickyD]

Drill a hole the correct diameter vertically into the hull, then use a rat-tail file to open out the hole into the right-shaped ellipse i.e. gradually making the hole a shallower angle as you work the file. If the hole is in the back of a skeg then drill the largest hole you can without damaging the hull and open it out with the rat-tail file or files.
DM
Dave wrote it, I do it the same way.

[rmaddock]

I've only just got the joke in the subject. 

[malcolmfrary]

When doing the one for the Revell Snowberry, which is not really amenable to the vertical, then make it oval system, I used a long, thin, very sharp bit, in a hand drill, then opened it out with a file.  Clamping the skeg in a workmate helped, as well, since the rotating bit did its best to separate the hull halves.

[cliff2903]

[derekwarner]

Goodness cliff2903... ...that is a loooooooooooooooooooooong series twist drill    .............

I could also imagine the hill firmly clamped down in a pedestal drill table with the planned axis of the drilling truly vertical.....you know...to minimise drift etc...... Derek