Now many know that I am a passionate supporter and user of the Bungee Catapult system ... having posted many times my design and videos in use. Mine is not only successful design and many other people have modified / adjusted / created own designs based like me - on others designs ...
Here is Nightflyyer and his A-Pult ...
It works ... and I do think about a similar version myself for carrying to venues where I cannot drive stakes into the ground. Whether it will work for a larger model - I'm not sure.... but for a small to mod size ... say up to 64mm - why not.
Then we have mine which is similar to thousands of others ...
There are commercial versions available - Jetapult etc. as well as HK selling a ramp affair.
I'm not starting this thread to create a 'this is better than this' debate ... just interested in ideas / modifications / changes people have made to designs and why. There are many out there that have seen my schematic for construction ... seen others ... and I reckon there must be many out there thinking about it ... so lets help them get on and build their launcher .. in what ever form or design they choose.
I posted here on General section and not the usual EDF / Pusher sections as Nightfyyer shows - his ramp works for wheeled prop jobs as well !!