Today's Message Index:
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1. 07:54 AM - Re: TR4 cowling. (Mark Kettering)
2. 06:17 PM - Sun-N-Fun 2014 (Galin Hernandez)
Message 1
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Subject: | Re: TR4 cowling. |
I have used many things to cover parts/temp molds/plugs to be able to pull of molds
and/or parts. Some include packing tape, plastic film, stretch-a-lon and
Mylar film. The Mylar film is the only one that actually works to provide a
mold like surface but can only be used for simple curves.
The others do work but then your mold or part just needs the finishing work that
you could have just done on the original part in the first place. Most of the
time it is more simple and less work to just finish the nice convex surface
of the original part/plug once and then the mold is good and future parts are
good. Crappy molds make crappy parts that need more finishing work for each
part. Not that crappy molds are not useful for one offs and when you have no
other choice.
The main idea I failed to get across is just take the molds off of a nicely finished
aircraft. This is less work and produces better results than trying to
take it off the parts. Of course this will not work with internal parts but many
can be made from flat panel anyway. Some like the spar can just be made from
simple wood forms.
Adding joggles for seams is also easy. In fact some of the joggles on Rich's original
molds were just added to the molds. In all cases flanges will need to
be added.
Mark
-----Original Message-----
From: Robert Reed
Sent: Mar 20, 2014 7:08 PM
Subject: Re: KIS-List: TR4 cowling.
I wonder if you could use a vinal-wrap to achieve the smooth finish without all
the filling and painting?
It was just a thought (more like a hope).
Bob
From: Mark Kettering <mantafs@earthlink.net>
Sent: Thursday, March 20, 2014 5:40 PM
Subject: Re: KIS-List: TR4 cowling.
Actually taking molds off the parts is not so easy. The parts do not have a smooth
finish so you would need to fill and paint them and this makes assembly a
little more difficult. Also the parts are not as rigid as the final assembled
group. You also still need to make the flanges to the molds. Mold making is
also a lot work and unless if you can sell at least few parts it is not worth
the effort and cost.
That being said maybe Mark Trickle is going to make molds for the TR-1 and some
parts for the Volato 400 may fit on the TR-4. One off parts are also not all
that hard to make if there is no other choice. For example Scott made his own
wingtips on his TR1 and cut the wing ribs from flat stock on the TR4
Blackbird.
Mark
-----Original Message-----
From: Robert Reed
Sent: Mar 20, 2014 11:51 AM
Subject: Re: KIS-List: TR4 cowling.
Considering the fact that obtaining parts in the future may be entirely upto the
current builders / flyers it would be great if we could get some molds made
off of those parts before you start any modifications and trimming. This would
be true for the wing tips as well. Those are probably the most vulnerable parts
that would ever need replacement. Would that be a possibility?
Bob Reed
From: Mark Kettering <mantafs@earthlink.net>
Sent: Thursday, March 20, 2014 9:36 AM
Subject: Re: KIS-List: TR4 cowling.
Hi Al,
Scott and I have both a Lycoming 360 cowl in carbon fiber and a Continental 6 cylinder
cowl in fiberglass. The problem is we do not know for sure what one we
will be using until we get an engine and do a trial fit. This is 6 to 12 months
away. What is your time frame? FYI, these cowls are Camarillo, CA.
Mark
-----Original Message-----
From: Alfred Rosa
Sent: Mar 19, 2014 7:45 PM
Subject: Re: KIS-List: TR4 cowling.
Near the
Venice FL municipal airport.
Sent from my iPhone
On Mar 19, 2014, at 6:05 PM, Galin Hernandez <galinhdz@gmail.com> wrote:
Al, where are you located?
On Wed, Mar 19, 2014 at 10:23 AM, Alfred Rosa <fredorosa@gmail.com> wrote:
Mark or someone , is there a cowling out there for sale? Desperate for a cowling.
Al rosa
Sent from my iPhone
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Message 2
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I will be flying my TR-4 to Sun-N-Fun on Saturday and maybe again on Sunday
so if anybody else is going let me know and we can maybe meet up.
Galin
N819PR
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