Bungee catapult ... where do I put this build thread???

[Wildthing]

Also wear shoes incase you step on the wrong side of the pedal, don't want to put that spike through your foot. . Seriously though the eye protection is a good idea.

 

[CarolineTyler]

All ready for launching on Sunday!!

 

[Hai-Lee]

Don't forget the video!

Have fun!

 

[CarolineTyler]

Don't forget the video!

Have fun!

Hat-cam will be doing its worst for sure!!!!

 

[mayan]

Looking amazing! Why didn’t you add another spar on the high side of the bungee like 1/3 from the bottom could give you some extra strength to the catapult. Just a thought.

Can’t wait to see the video. Good luck dear.

 

[CarolineTyler]

Looking amazing! Why didn’t you add another spar on the high side of the bungee like 1/3 from the bottom could give you some extra strength to the catapult. Just a thought.

Can’t wait to see the video. Good luck dear.

The bungee travels straight down the middle so any cross bars could hamper it when it fly's off. There's not much strain on the frame so hopefully it will be fine. I said I'm sort of winging it as I go along and if it needs more bracing I'll try to add it.

 

[CarolineTyler]

Bungee launcher success!!! Yay!

 

[Wildthing]

Bungee launcher success!!! Yay!

Way to go.

 

[LitterBug]

AWESOME SAUCE!

Cheers!
LitterBug

 

[mayan]

Bungee launcher success!!! Yay!

Wooooohhhh look at that thing go . You rocked it girl . I am amazed time and again by your skills my dear. Great job!

 

[CarolineTyler]

Wooooohhhh look at that thing go . You rocked it girl . I am amazed time and again by your skills my dear. Great job!

I don't know if my deep breath moment just before pressing the release peddle..... sooooooooooo nervous.
Thank you !

 

[CarolineTyler]

I don't know if my deep breath moment just before pressing the release peddle..... sooooooooooo nervous.
Thank you !

Looking at the two launches at 25% speed, I think I could have saved the first with a bit more up elevator.

 

[Hai-Lee]

No more bungled hand launches or glide tests for you!

Very simple procedure in reality!

Well done!

Have fun!

 

[mayan]

I don't know if my deep breath moment just before pressing the release peddle..... sooooooooooo nervous.
Thank you !

It was well heard.

 

[CarolineTyler]

No more bungled hand launches or glide tests for you!

Very simple procedure in reality!

Well done!

Have fun!

Thanks!

 

[kilroy07]

I don't know if my deep breath moment just before pressing the release peddle..... sooooooooooo nervous.
Thank you !

I was JUST going to say we could hear the deep sigh right before!

 

[FDS]

Well done. When I make or get a wing I will be making one of those too.

 

[jross]

Nice work, @CarolineTyler. Been thinking about this a lot lately for consistent launches with the larger wings I'm trying to fly. Couple of questions. What did you use to hook the launcher to the plane? In relation to the CG, where did you place the hook? I have bungees and all the hardware excepting bits for the launch rack. Thinking I may use a folding plastic table instead but undecided.

 

[CarolineTyler]

Nice work, @CarolineTyler. Been thinking about this a lot lately for consistent launches with the larger wings I'm trying to fly. Couple of questions. What did you use to hook the launcher to the plane? In relation to the CG, where did you place the hook? I have bungees and all the hardware excepting bits for the launch rack. Thinking I may use a folding plastic table instead but undecided.

It's a plastic wall hook attached to a small ply plate glued to the plane. It should be around a quarter to a third of the way forward of the CofG and the nose.

 

[joelspangler]

I have read through a few articles on these and I like your design. One thing everyone seems to let out is speciifics on the bungee cord itself. The bungee straps i have for holding things on my trailer vary greatly in pull strength, so I would think that longer cords would vary too. Is there a specific spec I should be looking for?