Hip Pocket Builders' Forum

Outdoor Free Flight Forum => Catapult Launched Gliders => Topic started by: Sundance12 on July 08, 2018, 12:01:14 PM



Title: Joe Foster's Catapult Glider
Post by: Sundance12 on July 08, 2018, 12:01:14 PM
Something new for me is a catapult glider. And I picked a simple 12 inch span version from the plan gallery.
I redrew it's simple lines to a clean sheet of paper and picked some wood to fit the bill. Along with the parts I also made some templates in 1/64th ply for the fuselage parts. Image is work is what is done so far.
Anyone who has tried this bird let me know what you have discovered?

I suppose if I am going to make one, perhaps two is as easy, but the scond one ends up being templates for number two, so really, glider two becomes glider number three, even if number two is a dummy.
What is the result of duplication, in that each subsequent copy looses something in translation. I hope the copies remember how to fly.


Title: Re: Joe Foster's Catapult Glider
Post by: jbfly on July 08, 2018, 04:57:26 PM
These fly great & are quick to build.  Lost 2 so far, always the best one
gets lost.

jbfly


Title: Re: Joe Foster's Catapult Glider
Post by: dlasich on July 08, 2018, 08:08:08 PM
I just started playing around with CLG and really loving it.  I built one of those just a few weeks ago.  It flies well but I have had much better luck with the Nighthawk glider... build video on youtube.  I can get it much higher... best flight so far is 50sec or so in calm conditions.


Title: Re: Joe Foster's Catapult Glider
Post by: Hepcat on July 08, 2018, 09:49:44 PM
I am intrigued!
Can this be the same Joe Foster who won the first place for Indoor HLG at the 1952 Nationals with an amazing time of 1:14?
John


Title: Re: Joe Foster's Catapult Glider
Post by: Sundance12 on July 09, 2018, 08:20:48 PM
Thanks for the replies all, I am not sure of any of Joe Foster's history. I liked the looks and size. I have completed it and it hand glides well. It will need to be trimmed a bit more.



Title: Re: Joe Foster's Catapult Glider
Post by: jbfly on July 10, 2018, 02:27:34 PM
Joe Foster did it all. He was VERY good at every catageoy of modeling FF indoor & out door. R/C pylon racing & Pattern.
a really nice guy too.

jbfly


Title: Re: Joe Foster's Catapult Glider
Post by: achmadDjd on March 26, 2019, 04:51:58 AM
I'd like to build as well, where I can find the plans?
Thanks


Title: Re: Joe Foster's Catapult Glider
Post by: OZPAF on March 26, 2019, 06:21:24 AM
http://www.hippocketaeronautics.com/hpa_plans/details.php?image_id=6405

John


Title: Re: Joe Foster's Catapult Glider
Post by: achmadDjd on March 26, 2019, 11:14:11 AM
Many thanks Jon.


Title: Re: Joe Foster's Catapult Glider
Post by: jerryCashman on May 13, 2020, 01:27:06 AM
That looks like a perfect thing to pop up to the local school oval with!

Anyone know what the ply tab is for? Assume the rubber-band hooks under the nose doubler - what's the tab do?

cheers. Jerry in Canberra.


Title: Re: Joe Foster's Catapult Glider
Post by: USch on May 13, 2020, 04:10:46 AM
The 1/64" plywood tab under the wing is to hold the glider for launch. Other prefer to hold on an fuselage extension behind the tailplane.
Depends how long arm's your mother made you  ;D

Urs


Title: Re: Joe Foster's Catapult Glider
Post by: w_Tom on May 13, 2020, 04:22:53 AM
This is a great glider I find the 12 inch size is to big for for the single football ground that i fly at. They scale well to 8 inches and you will lose them to trees and thermals . The longest flight where I have retrieved model was 1.30 minutes my  favourite flight was at VARMS when I had a one fly away in fount of the rc gliders pilots. The ply tab is a forward grip for a more stretch on the rubber.


Title: Re: Joe Foster's Catapult Glider
Post by: steve-de24 on May 13, 2020, 07:57:33 AM
Hi, these look like fun - I would like to give them a try when lockdown ends. 

Newbie question - what sort of catapult is used? How much rubber - what thickness?

Thanks in advance,

Steve


Title: Re: Joe Foster's Catapult Glider
Post by: PeeTee on May 13, 2020, 09:34:25 AM
The BMFA (FFTC) spec is 2 grams of rubber, if you use any more you are likely to lose the model. Either use 1/8 inch doubled over, or 1/4 inch.

Peter


Title: Re: Joe Foster's Catapult Glider
Post by: steve-de24 on May 13, 2020, 12:11:38 PM
Peter, Thanks for the info.  I calc that 2gms of 1/8th rubber makes up a 12inch loop (approx but good enough for me messing about).

Thanks again,
Steve


Title: Re: Joe Foster's Catapult Glider
Post by: thermal on May 14, 2020, 06:59:05 AM
Hello,
This looked like an ideal first build for me so decided to make one.
A quick test flight in the garden and all looks okay.


Title: Re: Joe Foster's Catapult Glider
Post by: jerryCashman on May 17, 2020, 03:57:06 AM
Well, I'm hooked!

CLG's have got to be about the best fun/investment ratio I've found :-)

One gentle evening in the shed and she's done and flies great.

First outting took a bit of tweaking (fun) and at the end of the session she was still in one bit and I was working up towards 30sec from a couple of mangy rubber-bands :-)

Love it!

Thanks Joe Foster!

cheers. Jerry


Title: Re: Joe Foster's Catapult Glider
Post by: thermal on May 17, 2020, 08:42:44 AM
Hi Jerry,
I’m in total agreement with you.
I haven't flown balsa wood gliders since childhood and really enjoy making, flying and tuning them.
There's a lot to learn of course, but enjoy the challenge  :)


Title: Re: Joe Foster's Catapult Glider
Post by: kiteshark on May 17, 2020, 03:02:53 PM
Hey Joe,

You're right, best bang for the modeling buck ever!

You're on your way.  Just wait for your first thermal.  It's an experience.  And then your first fly away.  Never anything as good as watching one of your babies fly away forever.

Enjoy,
Dave


Title: Re: Joe Foster's Catapult Glider
Post by: billdennis747 on May 17, 2020, 03:07:19 PM
You're right, best bang for the modeling buck ever!
Aeromodelling is one of the few hobbies where there is absolutely no connection between how much you spend and the enjoyment you get out.


Title: Re: Joe Foster's Catapult Glider
Post by: OZPAF on May 18, 2020, 04:54:37 AM
Completely agree!

John