Re: MJ BUILDING QUESTION.
- Hi Col
> 1. On bulkhead A there are shown what appears to be drain holes onwatertight
> either side at the base. What are these for? Isn't this a
> area? Are they necessary? Is this a stupid question?Yes, these are drain holes and yes that is a watertight area. Are
they necessary ? That I am not sure, but I did include them. My
AS-19 has a back bulkhead without the lumber holes, and water
back there in a way that is hard to bail out.
> 2. The plan indicates the FID at the mast base - I understand theNo - the mast rakes back slightly.
> concept f'wd of the mast, but there seems to be one indicted aft of
> the mast as well. Doesn't the mast sit flush the the bulkhead as
> indicated on the large side-on profile?
> 3. What is the easiest way to get the rudder drift rods into theMy drift rods are welded to the rudder shaft. I plan on building the
> rudder blade?
rudder in layers on either side of the rods somehow. I am not sure
exactly just yet. Check out my web site and give me a call if you
want to talk about it. Whoops - you are in Australia. Ok, send email
> Col Mooney
> Lismore, A
> > 3. What is the easiest way to get the rudder drift rods intothe
> > rudder blade?the
> My drift rods are welded to the rudder shaft. I plan on building
> rudder in layers on either side of the rods somehow.At the risk of putting my 'two cents' in where they are not asked
for... I think that there is an easier and better way to build the
rudder for the MJ.
Welds are not a good idea as they are prone to degradation, over time
and laminating 'around' the drifts presents problems as well.
What I suggest and did: Have the rudder shaft drilled to accept the
drifts (light driven fit) which are cut full length, per the plans.
Clamp the shaft, now with holes, up against a piece of two by four
which will be the leading edge of the rudder(a piece of hardwood
wouldn't be a bad idea); this done on a flat working surface. Using
shaft holes as a guide, drill holes through the two by four.
Now, using the two by four as a guide, clamp it up against the
laminated aft rudder section (leave it square to ease clamping, shape
afterwards) and drill the holes into the aft section. This again, is
done on a flat work surface. Take your time and clear the drill bit
frequently to avoid wandering.
Lastly, clamp all three pieces together and drive the drifts through
all from the forward edge of the rudder, aft.It will be a tight fit,
very tight, if done carefully.
Glass all heavily, paying particular attention the the area where the
shaft is as nothing, including epoxy likes to stick to stainless
One of the advantages of this method is that when the rudder bumps
something, (and it will!) solid wood as opposed to ply takes the
Other advantages should be obvious.
So much for my 'two cents'.
All the best, Bennett