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Apr 16, 2011, 03:38 PM
Registered User
Discussion

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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Apr 16, 2011, 03:54 PM
Registered User

Tow hook


Kennedycomposites.com ($15)
Apr 16, 2011, 04:04 PM
Registered User
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.
Apr 16, 2011, 05:13 PM
If it flies - I want one!
Petem's Avatar

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 10:09 PM. Reason: 'm' added, and thanks to Lincoln!
Apr 16, 2011, 06:18 PM
ak79's Avatar
Here you go mate-

Same unit as Kennedy sells, but in the UK

http://www.hyperflight.co.uk/product...table-tow-hook
Apr 16, 2011, 06:37 PM
It's gonna be YUGE!!!
LVsoaring's Avatar
Quote:
Originally Posted by ak79
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.
Apr 16, 2011, 06:41 PM
Registered User
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
Apr 16, 2011, 07:03 PM
ak79's Avatar
http://www.acemodel.co.uk/index.php

These guys may have one also.
Apr 16, 2011, 07:49 PM
Registered User
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
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
Apr 16, 2011, 08:36 PM
Registered User
Mark Miller's Avatar
I sell two types of tow hooks.

www.isthmusmodels.com

Look under Accessories.
Apr 16, 2011, 08:47 PM
Mfg of the Marauder & Oculus!
Mr B....'s Avatar
I also sell tow hooks.

www.mmglidertech.com

Merrill
Apr 18, 2011, 11:42 AM
Proud member of LISF and ESL
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#
Apr 18, 2011, 03:51 PM
Registered User
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.
Apr 19, 2011, 02:44 PM
dumbthumb
aleXtino's Avatar
I also want one of these for a 2mts glider, which is lighter?


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