Subject:
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Re: Engineering difficulties
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Newsgroups:
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lugnet.build
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Date:
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Sun, 11 Nov 2001 19:07:59 GMT
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Viewed:
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407 times
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In lugnet.build, William R. Ward writes:
> "LegoMasterLuke" <drew@netpluscom.com> writes:
> > 1) Tail fin. I'm making some modifications to my P-40 Warhawk, including
> > redesigning the tail fin. What is the best way to make a tail fin for such a
> > plane? I've tried a couple different methods, and so far its either been too
> > small or too big.
>
> I think your latest version is quite good... I assume this was posted
> before you had that worked out?
Yes, it was. I finally decided on using a click hinge to hold the tailfin in
a vertical position. I'm quite pleased with the end results.
>
> > 2) My next model is a PBY Catalina, which I'm working on at the same time.
> > How would one do the rear landing gear? The wheel stays vertical when the
> > landing gear is both retracted and extended, but it moves diagonally. (from
> > stowed, it moves down and out from the plane's fuselage.) Another difficulty
> > on this - not only does it have to move at an angle, but it also has to
> > support the plane's weight, which, since the PBY is a fairly good sized
> > plane (8 crew members) is respectable.
>
> With my PB4Y, I found that the landing gear wasn't strong enough to
> hold up the plane, so I cheated and built a display stand for it.
> This has the added advantage of being able to demonstrate the raising
> and lowernig of the wheels without having to pick up the model. I'm
> not sure how big the PBY is, but the 4Y has a 110 foot wingspan, which
> translates to 110 studs. I think the PBY is a bit smaller, but still
> quite big.
You are correct - the PBY Catalina has a wingspan of 104 feet, and a length
of 63 feet, just a little bit smaller then your PB4Y.
>
> If I were you I'd be more worried about the hull shape. The PBY is a
> very curvy plane. I had a much easier job with the 4Y because it is
> pretty boxy in real life.
Actually, I'm not that worried about the hull shape; the PBY is simply a
aerodynamic flying boat. The hull should be pretty easy, actually. The only
real challenges are going to be the nose turret, which is a lot smaller then
your ball turrets, so I have less room to make it spin around. Another
challenging part is going to be the large observation blisters on either
side of the back of the plane.
One thing I'm considering doing this is this; the PBY was built in two
versions, as a pure flying boat and as an amphibians, which had a tricycle
type landing gear. I'm contemplating scratching the landing gear entirely
and simply building a flying boat version.
> I'm really looking forward to seeing what you come up with for the
> PBY.
The colors are fairly annoying - I would love to do a white and blue color
scheme with yellow details, but I have no where near enough blue to do the
model. Where did you get all of your blue pieces?
~Drew
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Message has 1 Reply:
 | | Re: Engineering difficulties
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| (...) Yeah, it came out nicely. (...) And only two engines, as I recall. I'm surprised. Pulling something that big & heavy through of the water would take a lot of HP. (...) Turrets are a big challenge. I wish you luck. (...) I'd suggest doing that (...) (23 years ago, 11-Nov-01, to lugnet.build)
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Message is in Reply To:
| | Re: Engineering difficulties
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| (...) I think your latest version is quite good... I assume this was posted before you had that worked out? (...) With my PB4Y, I found that the landing gear wasn't strong enough to hold up the plane, so I cheated and built a display stand for it. (...) (23 years ago, 11-Nov-01, to lugnet.build)
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