HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 26, 2013, 04:53 PM
Up-Out-&-Gone
demondriver's Avatar
United States, SC, Charleston
Joined Mar 2007
15,986 Posts
Quote:
Originally Posted by zbrubaker View Post
to be honest, I haven't been able to put any time into it. I got super busy with family/personal stuff in the spring and it hasn't slowed down yet. I should be able to get back to it in a couple of months, we'll see.
I hope you get some 727-time Soon Sir . . .very cool project indeed!
demondriver is online now Find More Posts by demondriver
RCG Plus Member
Sign up now
to remove ads between posts
Old Sep 27, 2013, 12:12 AM
Registered User
Joined Nov 2004
245 Posts
Hi guys
Several years ago I did molds for a 727-200 at 1/24 scale. It was intended for display only.
Don't think I can do a light enough layup to fly in EDF. Anyone try a spray foam in a traditional
mold to make a light weight airliner?

Paul
ps2727 is offline Find More Posts by ps2727
Reply With Quote
Old Sep 27, 2013, 12:53 AM
Up-Out-&-Gone
demondriver's Avatar
United States, SC, Charleston
Joined Mar 2007
15,986 Posts
Quote:
Originally Posted by ps2727 View Post
Hi guys
Several years ago I did molds for a 727-200 at 1/24 scale. It was intended for display only.
Don't think I can do a light enough layup to fly in EDF. Anyone try a spray foam in a traditional
mold to make a light weight airliner?

Paul
Very Cool travel agency Model PS2727!

If you have the mold your home-free, you can lay in lightweight fiberglass & make a fan-fold internal structure and make as many 727's that you want.

I used to collect travel agency Models in my 20's to early 30's and had a good collection . . .if I knew then what I know now I would have molded all of them.

My crown jewel was a BAE Comet 4 that I bought at a yard sale in Long island, paid 200 bucks and it was worth over 2-grand! sold it 3 years later to help me buy a 2000 camaro z28.

I have a Hunch that many of the RC airliners kits in Europe are really molded from old travel agency models . . .someone ever told me the original Robby BEA-146 was molded from a travel agency model.

great UPS 727!
demondriver is online now Find More Posts by demondriver
RCG Plus Member
Old Sep 27, 2013, 07:29 AM
A Day @ a Time - Matt. 6:25-34
ruff1's Avatar
North AL, USA
Joined Nov 2009
1,934 Posts
Amazing, travel agency models being precise enough to be able to mold from. That is so cool. Attention to detail pays benefits!
ruff1 is online now Find More Posts by ruff1
Reply With Quote
Old Sep 27, 2013, 07:40 AM
Registered User
Joined Nov 2004
245 Posts
If I could have found a travel agency model that would have saved a lot of work,
but I had to start with a blank sheet of paper for this one. Here is a shot
of the plugs before molding....
I like the idea of a very light layup supported with fan fold formers!
My thought was to find a spray foam that would form a "skin" when applied to
a mold.
Another project is born!
Paul
ps2727 is offline Find More Posts by ps2727
Reply With Quote
Old Sep 27, 2013, 09:06 AM
I make bad look so good.
SteveC68's Avatar
League City, Texas
Joined Sep 2006
2,527 Posts
If you do some searching in the EDF section for an F9F Panther made by Stumax he details a process for making a light weight layup. He would cut 1mm depron to fit into the mold and then heat the depron with a heat gun so it would take the shape of the mold. I can't remember if he bagged and pulled a vacuum on the depron in the mold before the heat gun or not. After the depron took a set he he would layup a 0.75oz followed by the depron. Bag that and let it set. Then pop it out of the mold. Then back into the mold and another 0.75oz layer on what would be the inside of the depron. So you get a sandwhich of glass depron glass. This was a very rigid and lightweight layup. Do a search for all threads started by Stumax and you should find it.

Found it:

http://www.rcgroups.com/forums/showthread.php?t=93873

It's been a while since I read that thread and I missed a few points, like foam type and the weight of the cloth, but still a sound light layup.
SteveC68 is offline Find More Posts by SteveC68
Last edited by SteveC68; Sep 27, 2013 at 09:56 AM.
Reply With Quote
Old Sep 28, 2013, 02:33 AM
Registered User
Joined Nov 2004
245 Posts
Thanks everyone.
I'll read the thread.
727's forever!

Paul
ps2727 is offline Find More Posts by ps2727
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold LPU: Boeing 727-100 Project hi2nr Aircraft - Electric - Airplanes (FS/W) 14 Feb 22, 2013 10:52 AM
Sold LPU: Boeing 727-100 Project hi2nr Aircraft - Electric - Jets (FS/W) 3 Feb 21, 2013 12:04 PM
Boeing 727 Engines 1 & 2 Question David A Ramsey Scale Kit/Scratch Built 25 Dec 15, 2007 04:53 PM
Boeing 727 airfoil/wing design question David A Ramsey Electric Ducted Fan Jet Talk 12 Dec 12, 2007 03:34 PM
Boeing 727 Engine No. 2 Question David A Ramsey Scale Kit/Scratch Built 25 Apr 19, 2004 02:26 PM