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Old Apr 16, 2011, 04:38 PM
Banksy is offline
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Glider tow hook


Hello, hope some of you folk can help.

I'm looking to install a tow hook for high starts, I've searched the web but i'm not getting many hits. Ideally i would like it to be moveable so i can adjust the C of G once final trims are done etc. Does anyone know of where i can get one? The only ones that are coming up are basic and you can't adjust them. I'm not adverse to abit of home engineering so if anyone has any homemade designs i'd happily have a go.

Thanks in advance.

James.
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Old Apr 16, 2011, 04:54 PM
DOWN WIND JIM is offline
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Tow hook


Kennedycomposites.com ($15)
Old Apr 16, 2011, 05:04 PM
Banksy is offline
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Thanks for the quick reply, don't suppose you would know if they'll post to the UK? Had a look at their site for shipping terms but can't find anything.
Old Apr 16, 2011, 06:13 PM
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If it flies - I want one!
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Cup hooks


Banksy,
My favourite solution is a modified cup hook from the hardware shop. The ones with a screw on one end, then straight bit to a right angled bend. The straight bit is too long, so I line a packet of them up between two bits of scrap ply or hard balsa with just enough inside the sandwich (say 5mm) to form the vertical straight bit of my hook. Then squash the sandwich in a vice with the excess straight bits sticking up vertically and hammer them all over flat to one side. Pick a length for the horizontal part of your hooks, then cut off the excess with a Dremel cutoff wheel. Tidy up the cut ends and all done - four or five strong, cheap hooks.
For the adjustable part, drill a row of holes around 5mm apart in the belly of your sailplane (you need a wood block inside to take the screw thread) and screw your hook into the recommended position. Relocate as required.
Sorry about lotsa words, but I don't have pictures handy. However, I'll see if some nice person (perhaps Lincoln) can add a neat sketch a few posts down the page!
Cheers,
PeteM
Last edited by Petem; Apr 16, 2011 at 11:09 PM. Reason: 'm' added, and thanks to Lincoln!
Old Apr 16, 2011, 07:18 PM
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Here you go mate-

Same unit as Kennedy sells, but in the UK

http://www.hyperflight.co.uk/product...table-tow-hook
Old Apr 16, 2011, 07:37 PM
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It's gonna be YUGE!!!
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Quote:
Originally Posted by ak79 View Post
Here you go mate-

Same unit as Kennedy sells, but in the UK

http://www.hyperflight.co.uk/product...table-tow-hook
Unfortunately, the website says out of stock, delivery in 30-90 days. I'm pretty sure KC would ship something like that to the UK. Send them an e-mail and just ask.
Old Apr 16, 2011, 07:41 PM
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I used to make my own with just a drill and a file.
Iposted it somewhere here long time ago but I can't find them now. I'll keep looking if not, I'll see if I can find one and take few pics of it...
Fernando
Old Apr 16, 2011, 08:03 PM
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http://www.acemodel.co.uk/index.php

These guys may have one also.
Old Apr 16, 2011, 08:49 PM
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I've been doing this for years. Works just fine. Less weight and drag than most other tow hooks, though a fairing around the vertical part might be worthwhile. I know the sketch is terrible, but I think it gets the idea across. The wood block inside needs to be strong, and to resist splitting. Aircraft ply is pretty good. I use these even on 3M gliders, though of course the larger the glider, the larger the cup hook I use.
Quote:
Originally Posted by Petem View Post
Banksy,
My favourite solution is a modified cup hook from the hardware shop. The ones with a screw on one end, then straight bit to a right angled bend. The straight bit is too long, so I line a packet of them up between two bits of scrap ply or hard balsa with just enough inside the sandwich (say 5mm) to form the vertical straight bit of my hook. Then squash the sandwich in a vice with the excess straight bits sticking up vertically and hammer the all over flat to one side. Pick a length for the horizontal part of your hooks, then cut off the excess with a Dremel cutoff wheel. Tidy up the cut ends and all done - four or five strong, cheap hooks.
For the adjustable part, drill a row of holes around 5mm apart in the belly of your sailplane (you need a wood block inside to take the screw thread) and screw your hook into the recommended position. Relocate as required.
Sorry about lotsa words, but I don't have pictures handy.
Cheers,
PeteM
Old Apr 16, 2011, 09:36 PM
Mark Miller is offline
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I sell two types of tow hooks.

www.isthmusmodels.com

Look under Accessories.
Old Apr 16, 2011, 09:47 PM
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I also sell tow hooks.

www.mmglidertech.com

Merrill
Old Apr 18, 2011, 12:42 PM
aeajr is offline
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The one at Isthums and Kennedy are both adjustable and would be great adjustable hooks for 2-4 meter gliders.

http://www.isthmusmodels.com/accesso...yloom-detail11

http://www.kennedycomposites.com/misc.htm#
Old Apr 18, 2011, 04:51 PM
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Woah, thanks for all the advice and comments, this is a cool and welcoming forum to the new guy. I've managed to source a hook from ebay (along with other various gizmos, the missus will kill me). Hopefully I should get out for my maiden this weekend, weather depending.

Thanks again.
Old Apr 19, 2011, 03:44 PM
aleXtino is offline
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I also want one of these for a 2mts glider, which is lighter?


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