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Mar 05, 2004, 09:44 AM
Magicsmoke maker
Inflexo's Avatar

DLG/HLG made of Balsa? Suggestions?


Hi there all,

I'll start out by saying, I'm a balsa-builder. So, please don't tell me to make foam-wings or what ever :-D

I'm coming here to ask if anyone has actually made a decent (moderately decent) HLG/DLG from balsa. I've never had a HLG/DLG before, everything else I've made is just very small electric (less than 220g).

Any suggestions/plans?

Regards.
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Mar 05, 2004, 09:46 AM
Magicsmoke maker
Inflexo's Avatar
I forgot to say - I'm not after competition level or such. I just wish to enjoy my 30 min breaks at the local sports-fields (lovely open area). Right now I fly my two small electric gliders, but a true-glider would be nice.
Mar 05, 2004, 09:55 AM
(AKA) Boomerwankanobi
Stocker's Avatar
One Word, (GAMBLER)

http://www.wrightbrothersrc.com/


Mike Baker
Mar 05, 2004, 10:00 AM
Magicsmoke maker
Inflexo's Avatar
Looks good - even looked at the videos. While I'm a bit far away to order from them - certainly this gives me hope. Time now for me to start pulling out the CAD and working on some new plans .

I suppose there's a lot to be lost/gained in the selection of the wing section with these gliders, such a large envelope to handle.

Paul.
Mar 05, 2004, 10:13 AM
Registered User
jrgospod's Avatar
If your a builder check this out.

http://groups.yahoo.com/group/BugHLG/

John
Mar 05, 2004, 01:04 PM
ADDICTED TO LIFT
glider34's Avatar
pldaniels,

Mark Drela has many designs on the Charler River RC site, but one comes to mind that I had a blast with.... The Apogee 40. V dihedral and really climbs out. My 1st RC glider was this one.

Go To:

http://www.charlesriverrc.org/articl..._apogeehlg.htm

Try it out...all balsa except for reinforcements and boom material.

Glider34
Mar 05, 2004, 01:38 PM
Red Merle ALES
Curtis Suter's Avatar
I'm in the process of doing just that.

As I get more into the actual building I'll post some photos of what I'm doing and once I have 50 flights I'll post my results.

The wing is built up similar to this.
https://www.cstsales.com/How_to_Arti...rbonRodApp.htm

The differences I'm making are from the spar forward around the leading edge I'll sheet with 1/16" balsa, top and bottom, i.e D-tube. The ailerons will be fully sheeted as well. The spar is .030 CF and will go to the tip. The last 3" of the tip will have no ribs and be a balsa sandwich. This allows sanding the tip to a taper and attaching the thowing peg to the rear of the CF spar. I'm using a SD7080 airfoil.

The planform is 7.5" at the root and 4" at the tip, with a taper very similar to the SuperGeeII.
http://www.charlesriverrc.org/articl...SuperGeeII.htm

The tails will be balsa with very light glass and the planform the same as the SuperGeeII.

The fuselage boom is a G-Force tapered CF tube from:
https://www.cstsales.com/Carbon/carbon-tubes.htm

The forward fuselage is very similar to this but my dimensions will be slightly different due to radio gear being installed.
http://www.charlesriverrc.org/articl...r_fusetail.htm

That's about it, any questions please don't hesitate to ask. I'm just finished up with all the planning and am cutting ribs now.

Curtis
Helena, Montana
suterc@msn.com
Mar 05, 2004, 02:12 PM
ADDICTED TO LIFT
glider34's Avatar
Curtis,

The Apogee is an underrated model in my opinion and really represents a lightweight solution to all flyers that have ZERO interest in foam.

You rarely have to play with epoxy...

You can use traditional building methods..

The Model is far prettier than most.

I'm building a couple of DLG's - A Super Gee and A "Simple" Super Gee and when I look at the Apogee I wish I had built another one of those! My Old Apogee was a Solid winged 40 with Polyhedral. I replaced it with an Art Hobby Colibre. The Apogee had close to disintegrated many times but is a very rebuildable model.

Post some images when you have a chance....

Glider34
Mar 05, 2004, 03:16 PM
Registered User
charlieuk's Avatar
damit now i want one of them to.i would like to do the allmolded thing though it looks like a real nice ship.any one got a cnc mill

glider34 what did your solid wing consist of ive done some larger solid wings but the only small one i did flew like a bag o sh1te.i saw somone that had done a wing witch had a balsa d box then foam the rest of the way which looked quite good. did you cut any holes in it? lastly when i do my solid wings i make templat for root and tip then just eye ball it and start carveing(the wing was 2.2m span) and they came out quite good but u cold never call it an exact airofoil what method do you use?
Mar 05, 2004, 03:45 PM
ADDICTED TO LIFT
glider34's Avatar
Charlieuk,

My Apogee wing was made out of 5-6lb "C" grain 1/4" sheet. I sanded it with a dewalt power "palm" sander. Hardwood LE. I used Nitrate Dope thinned 50/50 and Microbaloons to secure the wingbolt. No covering....Just Wood.

Glider34

PS. I may build one
Mar 05, 2004, 04:57 PM
Registered User
charlieuk's Avatar
fare enuf must be nice doing it with the e parm sander ive always had to do mine just with a manual parm sander which sucks.might have to give it a go if i can get it nice i could always take a mold from it i ges?
Mar 05, 2004, 10:18 PM
Magicsmoke maker
Inflexo's Avatar
Hi everyone,

Well, thanks for the input, I've certainly got a lot of things now to look at and learn *so much learning*. Going to have to see if I can find some CF rods, not exactly a common item around here (Outback Australia).

Paul.
Mar 05, 2004, 10:35 PM
Registered User
John Gallagher's Avatar
If you do decide to build a Bug, take a look at the yahoo discussion group.

http://groups.yahoo.com/group/BugHLG/
Mar 06, 2004, 09:23 AM
Magicsmoke maker
Inflexo's Avatar
I think that I'm going to go with something like the Gambler, really looks like my kind of style.

Now, the trick for me is to scratch some plans out :-D (then crash a few times, complain about poor design a few times, fix, rebuild... repeat).

Paul
Mar 06, 2004, 10:07 AM
Gambler-AG DLG Designer
Allan Wright's Avatar
Airfoil selection in a balsa SAL/DLG is very tricky. I tried several on the Gambler before I settled on the S3021. The Drela foils are better, but even his balsa ones were too thin for me at 1.25 meters. If you build a 1.5 meter plane they'll be a great choice.

Start small, like with a bug, then work up in size. The larger your span gets, the more challenging it is to keep balsa from blowing apart on launch. I think you'll find that your best friend is carbon fiber iron-on ribbon and/or CF cloth applied judiciously to your wing's D-tube.

Allan Wright - Gambler designer

P.S. I've shipped Gamblers to Australia and New Zealand. Delivery time is a couple weeks airmail and 7 weeks surface mail. Plans and CF ribbon only can be mailed Global Priority and get there quicker.


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