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« on: September 27, 2018, 04:55:57 AM »
aaindthu
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I designed and finished building a Hand Launch Glider.  Here are the pics.

I am going to test it out on Saturday.  Wish me luck, I guess I will need a lot.  Undecided

001.jpg
Homemade, self-designed HLG Glider
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« Reply #1 on: September 27, 2018, 05:08:25 AM »
sanjayrai55
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Looks good  Clap

All the best for the maiden  Thumbs Up
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« Reply #2 on: September 27, 2018, 09:01:11 AM »
aaindthu
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Looks good  Clap

All the best for the maiden  Thumbs Up

Thank you Smiley
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« Reply #3 on: September 27, 2018, 09:32:12 PM »
Prakhar Verma
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Did you use balsa to make it
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« Reply #4 on: September 28, 2018, 11:17:02 AM »
aaindthu
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Did you use balsa to make it

that's just high density foam. 
I will upload the build video if the glider is successful
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« Reply #5 on: September 28, 2018, 12:39:39 PM »
Ajay Sarwan
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Hi. Where did you buy HD foam and how much was it?
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« Reply #6 on: September 28, 2018, 07:18:20 PM »
Imperial fire
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Keep calm and fly safe.



u can get better results is u use styrofoam... stiffness weight ratio is excellent
i dont make airplanes anymore but the last time i used blue styrofoam i smiled a lot.
got it form a shop in bangalore near townhall. cant recall its name tho.
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« Reply #7 on: September 29, 2018, 08:17:29 PM »
aaindthu
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Today I learnt myself One big lesson

It is a BAD idea to put symmetric airfoil in a glider especially

when there is no slope for soaring..

My glider was working fine, it turned left, right, pitching up and down but..
it never climbed.

I think it was because of the symmetrical airfoil that i used or it could also be because there was no significant slope from where I tried.

But I am going to try again with a camber airfoil next week with the same fuselage.

So, the bottom line is that my glider design is a flop.  But I will try again.
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« Reply #8 on: September 29, 2018, 09:50:49 PM »
K K Iyer
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How did you launch?
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« Reply #9 on: September 30, 2018, 03:36:40 AM »
aaindthu
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How did you launch?

nothing fancy.  Simply hand launched it against the wind.  I am going to try again with


A cambered  airfoil next week. That should work.
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« Reply #10 on: September 30, 2018, 08:21:19 AM »
shobhit17
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Well friend...... if the glider flew straight and level with a simple hand launch.... IT DID FLY WELL..... DO not be dissapointed.... a glider does not climb till it is taken higher by a thermal or it is launched by an external device like a Tow line or another aircraft / model.

if the glider is fine try doing another hand launch straight and level to the ground and show he video...

Yes a symmetrical airfoil is not good for a glider.  But it does not mean that with a cambers aerofoil it will climb......
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Well I been into aeromodelling since I was in School....  had won the "WINGS Open" at "Bombay" (as it was known then) in 1985 for control line aerobatics (was doing my graduation at that time) and had received a big gold trophy....  Mr Bhivandiwala organised it and gave good awards.
Our team had won the following medals:-
1.   Gold for Control Line Aerobatics
2.   Silver and Bronze for Control line speed
3.   Bronze for Free Flight Glider
Sharma Models helped us train to win the medals
 

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« Reply #11 on: September 30, 2018, 10:51:45 AM »
aaindthu
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Well friend...... if the glider flew straight and level with a simple hand launch.... IT DID FLY WELL..... DO not be dissapointed.... a glider does not climb till it is taken higher by a thermal or it is launched by an external device like a Tow line or another aircraft / model.

if the glider is fine try doing another hand launch straight and level to the ground and show he video...

Yes a symmetrical airfoil is not good for a glider.  But it does not mean that with a cambers aerofoil it will climb......

I know aircraft cannot climb without thrust.  I meant that with a camber airfoil, the glider may stay airborne for longer duration.  I know it cannot climb..  Thank you for your kind words.  They are encouraging.
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« Reply #12 on: October 02, 2018, 06:12:26 PM »
aaindthu
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Due to lack of any significant slope in my location, my glider could not fly well.

Therefore, I am quitting to build slope soarer or gliders - for now.

I will return with some other project soon Wink

thank you all.
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« Reply #13 on: October 02, 2018, 06:19:37 PM »
Ajay Sarwan
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All the best.
Where did you buy HD foam and how much did it cost? also what is the density of your HD foam?
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« Reply #14 on: October 02, 2018, 06:42:26 PM »
Kratky8
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Very neat! Where did you try out the glider? If you have a friend in tall apartment buildings at ecr you can maybe try the hand launch from there  Wink

Good luck with your next build!
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« Reply #15 on: October 03, 2018, 05:25:03 PM »
aaindthu
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All the best.
Where did you buy HD foam and how much did it cost? also what is the density of your HD foam?
@Ajay Sarwan - I bought the hd foam in sheet form in nearby fancy store in avadi, chennai.  they call it "hi-tech" thermocoal.  it costs Rs 45/- per sheet (1mX.5mx2cm)
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