Loony Lander

Rocketry that will literally wet the appetite

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kitestring
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Loony Lander

Postby kitestring » Mon Oct 26, 2015 2:56 pm

Gday
The Martian film inspired me to try building a lander.
The lander separates from the rocket at apogee. The legs then fold out and a parachute is released. The rocket comes down on its own parachute and lands on independent suspension (elastic bands).
Tomy timers and elastic bands control all actions.
Seems to work OK except have yet to work out the lander release from Rocket system current attempt is utter rubbish.
Pics attached are prototypes. Legs that where made of balsa broke, so made from lightweight ply.

Chance of success: <3
Intend to launch early November.
Crash results and damage report will be posted on Youtube.
cheers
Attachments
IMG_0330 (1).jpg
Lander loaded and ready to go with legs folded and parachute in place.
IMG_0330 (1).jpg (212.37 KiB) Viewed 705 times
IMG_0333 (1).jpg
lander with legs extended and ejected nose cone
IMG_0333 (1).jpg (196.56 KiB) Viewed 705 times

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SpaceManMat
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Re: Loony Lander

Postby SpaceManMat » Mon Oct 26, 2015 3:34 pm

Have you ever staged water rocket? Isn't this effectively a second stage?
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kitestring
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Re: Loony Lander

Postby kitestring » Mon Oct 26, 2015 4:08 pm

SpaceManMat wrote:Have you ever staged water rocket? Isn't this effectively a second stage?

Gday, I don't think it's really a second stage as the lander has no engine. it is simply dropped off with a chute deployment a second later.....
Would love to do a second stage and will attempt in the future. This was just a bit of fun trying to make auto extending landing gear.

Lister
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Re: Loony Lander

Postby Lister » Mon Oct 26, 2015 7:05 pm

Thats super cool. Would love to see it in action 8)

kitestring
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Re: Loony Lander

Postby kitestring » Mon Oct 26, 2015 7:26 pm

Lister wrote:Thats super cool. Would love to see it in action 8)

Thanks Lister
Will do a demo vid soon and then a real flight video in NOV when i get the release mechanism sorted... Rule24: the more complex things are, the more things can go wrong.

Lister
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Re: Loony Lander

Postby Lister » Mon Oct 26, 2015 7:28 pm

Looks like you kept it pretty simple.. I cant see alot going wrong with it... how do the legs lock in place once deployed?

kitestring
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Re: Loony Lander

Postby kitestring » Mon Oct 26, 2015 8:04 pm

Lister wrote:Looks like you kept it pretty simple.. I cant see alot going wrong with it... how do the legs lock in place once deployed?

Each leg has an elastic band attached through a hole drilled though the outside of the fin and attached up inside the lander body. a bit of a spiderweb.. Hope the eventual vid will explain.
I always thought this stuff would be easy as well but i am no engineer.
With flimsy plastic bodies and clockwork timers, there's always more than 1 thing that can go wrong and that's all it takes.
• Initial timer going off and releasing the main radial shroud correctly (shroud is an A4 plastic sheet that wraps around top of rocket covering chute) (works fine on its own without lander)
• Tangle issues with shroud OR the chute itself
• Separation system (not worked out (every current effort failed, jammed, tangled not released)
• Tangle with Lander and main chute.... etc
• Final lander chute deployment
• Tangle with lander chute and leg deployment (quite likely)
• operator error (me)

air.command
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Re: Loony Lander

Postby air.command » Mon Oct 26, 2015 8:08 pm

That looks great Jeremy. I love the concept. I take it the lander is unpressurised? Perhaps to simplify the lander release I wonder if you could separate it just like a boosted dart. The lander just has a cone in the nozzle that fits inside a similar cone attached to the booster. I'm thinking something along the lines of a plastic nozzle for a cauling gun. The two are then just drag separated, though you may need a little more mass in the lander.

- George
Crop Circles: ... just a bunch of guys looking for their rockets ....

kitestring
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Re: Loony Lander

Postby kitestring » Mon Oct 26, 2015 8:41 pm

air.command wrote:That looks great Jeremy. I love the concept. I take it the lander is unpressurised? Perhaps to simplify the lander release I wonder if you could separate it just like a boosted dart. The lander just has a cone in the nozzle that fits inside a similar cone attached to the booster. I'm thinking something along the lines of a plastic nozzle for a cauling gun. The two are then just drag separated, though you may need a little more mass in the lander.

- George

Lander made from very small water bottles.No pressure (no room due to internal elastic bands and timer)
Brilliant idea George, and way simpler. Thanks for that. Anything to avoid more line to tangle and things to fail. The lander has quote a bit of mass due to nylon bolts and ply legs etc.
Thank you

october sky
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Re: Loony Lander

Postby october sky » Mon Oct 26, 2015 9:05 pm

Jeremy, that is one cool looking rocket/lander ! 8)
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kitestring
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Re: Loony Lander

Postby kitestring » Mon Oct 26, 2015 9:15 pm

october sky wrote:Jeremy, that is one cool looking rocket/lander ! 8)

thank you
hope to get it off the ground and back to earth in no less than 3 pieces at QRS Nov launch site if deemed safe to let fly.....


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