Elastic Launched Gliders B

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Re: Elastic Launched Gliders B

Post by Maxout »

builderguy135 wrote:
What do you mean by wing root?
The area of the wing right next to the fuselage.
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Re: Elastic Launched Gliders B

Post by builderguy135 »

Maxout wrote:
builderguy135 wrote:
What do you mean by wing root?
The area of the wing right next to the fuselage.
Oh, thanks!
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Re: Elastic Launched Gliders B

Post by bjt4888 »

Builder,

Sorry, forgot to answer your question. Yes, keep winglets the same height.

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Re: Elastic Launched Gliders B

Post by Saiguy7 »

Can anyone reach out to me if they know any ideas on how to help gliders have a smooth transition? Currently, my glider just comes back down immediately without transitioning. Any other tips are welcome.
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Re: Elastic Launched Gliders B

Post by MattChina »

Saiguy7 wrote:Can anyone reach out to me if they know any ideas on how to help gliders have a smooth transition? Currently, my glider just comes back down immediately without transitioning. Any other tips are welcome.
If that happens ur glider might not be balanced and too nose heavy or stalling
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Re: Elastic Launched Gliders B

Post by Maxout »

Saiguy7 wrote:Can anyone reach out to me if they know any ideas on how to help gliders have a smooth transition? Currently, my glider just comes back down immediately without transitioning. Any other tips are welcome.
If it's diving all the way to the floor, add up elevator. Otherwise it's an issue of rudder trim and wing wash. Here's a trimming guide that's applicable to any flapped glider: https://www.youtube.com/watch?v=MuNag5fH_EI
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Re: Elastic Launched Gliders B

Post by NewSciolyer »

Hey guys,

When I launched my glider (Guru 19, 28cm wingspan, 35cm fuselage) it launches up no problem, but on the descent, the right wing points to the ground the the glider sprials to the ground. I think it is because the wings were unbalanced, but when I added a bit of clay on one wing, it didn't really seem to help. This glider currently weights 4.2 grams and I am still looking for ways to reduce the weight. Thanks!

Many thanks,
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Re: Elastic Launched Gliders B

Post by fifty_missions »

Can anyone reach out to me if they know any ideas on how to help gliders have a smooth transition? Currently, my glider just comes back down immediately without transitioning. Any other tips are welcome.
1) Easiest solution is to get the glider to stall and launch at a 45 degree angle with a bank to begin the process.

2) Observe results.

3) If glider transitions but stalls, two choices.... add some clay to the nose until the stall goes away OR bend some down elevator on the trailing edge of the stabilizer

4) Do adjustments in degrees or millimeters of change, nothing drastic.

5) Need more orbit? Bend the trailing edge of the fin like a boat rudder to increase or decrease orbit.

6) Once there is a transition, work higher with your launches. This may mean increasing the bank angle (Wing tip up or down using the fuselage as the axis).

Good Luck,
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Re: Elastic Launched Gliders B

Post by Jdh3 »

NewSciolyer wrote:Hey guys,

When I launched my glider (Guru 19, 28cm wingspan, 35cm fuselage) it launches up no problem, but on the descent, the right wing points to the ground the the glider sprials to the ground. I think it is because the wings were unbalanced, but when I added a bit of clay on one wing, it didn't really seem to help. This glider currently weights 4.2 grams and I am still looking for ways to reduce the weight. Thanks!

Many thanks,
NewSciolyer
I’m sure you have already done this but:
1) does it hand glide ok? If not, it may have too much nose weight.
2) if you launch it with low power and level, does it climb slightly and then make a right turn before gliding? If not, what does it do?
3) have you rechecked the angle of the rear fin? If it is angled too much it will affect it significantly at high speed and the glider will not recover
4) is your right wing tip lower than the left but Not lower than the plane formed by the stabilizer?
5) have you changed your launch angles? What was the effect? Do you have any videos?

Thanks
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Re: Elastic Launched Gliders B

Post by NewSciolyer »

Jdh3

1) Yes, it does hand glide okay with a little forearm flick, but any harder it will stall.
2) When you launch it horizontally with low power and no bank, it climbs linearly for 2 feet and then tries to transition right into a glider, but the right wing tips downwards, bringing the whole plane down.
3) I haven't tried reattaching the tail fin, and that might be the problem
4) The right wing is tilted closer to the stabilizer, but only a few degrees lower than the left, still above the stabilizer
5) I tried to launch it with no bank, and it doesn't work. I might have to try to bank it to the left to compensate, but I'm not sure if it would work. I don't have videos, sorry.

I think in the process for sanding the flap in the wings(flapper design) I think I sanded the left wing a bit more, thus creating unbalanced lift.

Thanks so much for replying!

NewSciolyer

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