Jet powered model boat (inspired in NQD) by javierru

Last crawled date: 3 years ago

I have seen a lot videos of people who bougth an NQD to upgrade the powerplant and have a nice and funny model boat, i wanted also but i couldnt find the model i was looking for, and when i found it, it was too expensive. So i decided to design my very own jetboat. As you can se in my other project (http://www.thingiverse.com/thing:1141731) i have already a propeller-powered boat, it is nice and quick, and its funny to follow ducks ;D but it is not very agile, so a jetdrive was the new thing to build. It runs very smooth and its very cheap in the configuration that i used, but i recommend to use another powerplant, despite of it will be a little bit more expensive, with my configuration the motor goes very hot, and at some points it can even partially melt the holder, ending in a motor loose (after giving a lot of gas for 10-20 min)
My powerplant is:
Mabuchi 540 (4.5 Euros at home if you buy 3) http://www.hobbyking.com/hobbyking/store/__79498__Mabuchi_RS_540SH_6527_Brushed_Motor_90W.html
3.175 to 4 mm coupling https://www.hobbyking.com/hobbyking/store/%5F%5F40743%5F%5FUniversal%5FDrive%5FShaft%5FCoupling%5Ffor%5FBoat%5F23mm%5Fx%5F3%5F17%5F4mm%5F2pc%5F.html
DC ESC http://www.hobbyking.com/hobbyking/store/__9090__Turnigy_20A_BRUSHED_ESC.html
3S 220mAh LiPO http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=10383
9 gram servo http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=662
i didnt calculated but probably you can build your own jetdrive boat under 30 euros
you can see how it runs here https://youtu.be/vU8ZhXroyTs
for the hull i used PVC foam and a lot of hot glue, it can be bougth in sheets and costs 5 euros pro sq meter, i have no plans because i build it by hand ;(
for the shaft i used inoxsteel 4 mm rod, it can e found in some hardware store,
Have fun!