In a fit of madness
I decided to convert the Airfix Mk.l into a Mk.V Anson. I mean how hard could it
be? The general outlines are the pretty much the same , well except for... the
vertical fin/rudder profile, the upper fuselage and windows, canopy, engines,
cowls and landing gear! Yeah well, I did it anyway! I had been approached to
build this model by a Veteran that had been a navigation instructor in the
British Comonwealth Air Training Plan and had spent much time in Ansons...Mk.V
Ansons. So I just had to do it and besides, it would give me a chance to play
with vacuforming and trying some new techniques, it was going to be fun.
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The Airfix kit is of
a Mk.l which was a tube and fabric aircraft and the Mk. V was an all plywood
aircraft. They used plywood because it was readily available and they could
redirect the aluminum to the war effort. Actually, Anson V's were built in
Winnipeg (about an hour from where I live) by Macdonald Brothers Aircraft during
the war. Step one would be removing all fabric detail on the kit. So I
generated a pile of styrene dust over a few evenings and now had a
"plywood" airframe. I will not bore you with all the details of the
build but will touch on a few things that may be of interest.
The Mk.V had P&W Wasp Jr (9
cylinder) but the Mk.l had 7 cylinder engines so I was going to need some
replacements. Engines and Things sells these and in hindsight, I should have
bought them. I had the Academy Texan kit that I was converting into a
Harvard which has a 9 cylinder engine and decided to cast some new ones for the
Anson. Yes, the Harvard engine (600HP) is larger than the Anson's (450HP) but at
this scale who would know? I was just after the correct number of cylinders. I
have used RTV rubber in the past for casting parts and had recently picked up
some latex rubber for molds and wanted to experiment with it. Basically its
brushed onto you master and built up in layers (long process allowing some
curing between layers) until you reach the desired thickness of your mold. RTV
rubber is a two part system that is poured onto your mold which is much faster
but also much more expensive. (Latex $7 vs RTV $30 for same amount) The result?
Latex is fine for a few copies but the mold seemed to deteriorate after only a
few copies. Also, this was a 1 piece mold because you would see the front of the
engine only. While I have not tried a 2 piece mold, it should work fine.
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The aluminum cowls,
crew access door and panels on the wings were replicated using aluminum foil
tape. This tape is often used by plumbing and heating professionals for sealing
joints on ductwork. It looks like bare metal foil only thicker. You
can easily "make" rivets by pressing into the foil with the
appropriately shaped tool. It has many modeling uses and encourage you to try
some on your next project.
Other than that, a
pretty "straight forward" conversion. Thanks to the many people here
at ARC that helped with reference material and photos. I hope you
enjoy, I did.
Barry
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