RC India

hi guys

here is an air boat it built long time back n now converted it to R/C boat  ;D

http://www.youtube.com/watch?v=R35MdXQmncc

Add some wheels, and you can drive it over land also  {:)}

yep i think that would be my next project, here is one more video (better quality)  ;D

http://www.youtube.com/watch?v=-cpJe8oN-N8

guys what do you think the boat is fast enough or need more speed  8-)

I think the speed is OK, what would have been nice is to use a ducted fan motor  8-)

When can we see the amphibian version ?

speed to size of boat is extra......i saw, the boat capsized during sudden turn.....need to work on design....overall......FANTASTIC... {:)} {:)} {:)} {:)}

Yes... man ducted fan will be great... I am also working on the ducted fan version....

hi guys

did some mods,reduced the motor mount high n adjusted the upward angle now ever thing is fine = more speed and zero flips  ;D

http://www.youtube.com/watch?v=pxiEJJyT3LY&feature=channel

anwar I'm in the process of collecting parts, i think i will implement the ducted fan in this version  :)

sahil

Hai..sahilkit.... I am planning to build it.. could u please tell me what all should i keep in mind??..

Guess A Pusher Prop Would Have Given It A  {:)} HOVERCRAFT  {:)} Appearance......... Nice work man  {:)}

Edwin

the rudder has to be 10%(area) of boats length,if you have a fast boat keep the rudder short or vice versa

if one is using a pull setup then the motors angle should be slightly upwards (experiment to get the best results)

if its a push setup then point the motor downwards

very important keep the CG as low as possible, if you think you have a higher CG increase the sides of the boat this should stabilize it n prevent flipping or dunk.

please remember I'm not an expert just a hobby guy..................
sahil

thanks Edwin, yea so true

sreedhar make sure u protect your electronics well from water may be water proofing !

sahil

see this link it might be of help

http://www.gutenberg.org/files/29064/29064-h/29064-h.htm

sahil

Dear Sahil

I think you will get better results if you have two air rudders (Better control, real ones also have two)and
two fins (10mm height)  running paralell  throughout the legth of  underside(Gives more stability).

jitender

hello jitender

I'm planning to build a newer model and i think i will implement ducted fan,fins,double rudder anything else  8-)

sahil

In this world full of RTF packaged clones, this baby is worthy of a lot of respect! Great job done Sahil! Love it................!

Cheers!

VC

+1  
I am impressed how you used the simple brushed motor and above all you DIY Brushed ESC!!
Dual rudder should definitely give you better  control.
Replacing the foam motor mount with a 'U' shaped Balsa would give you added stability. I think you mounted the motor with Glue/Tape.
Have seen many speed boats just going air born and turtle back. Do try to water proof you Reciever and Lipo than anything else. improvising with Zip pouch would be nice.

Kudos once again for trying something different than just planes....

Did somebody tried 'Hover Craft' ?
-uj

Nice work.
Reminded me of a hovercraft i built ages back. It had 3 motors. 2 at the back for steering/moving forward/backwards and one at the center that compressed air which went through a bicycle tubing at the bottom with holes . It worked both on ground and on water.
Will try to get some photos here one day

very very nice sahil.
any reason why are you not using regular boat drive mechanism? ( motor/ shaft/ prop)?
for simplicity i suppose!
great effort sahil
ashta

CAN U TELL ME THE RPM OF THE MOTOR USED

thanks guys n sorry for the delay in replying (working)

rahul here is the setup i used :

motor: from a Chinese 2ch heli motor size is 280 and can take 3.5amps @ 7.4 volts (motor is warm)
prop: GWS 5X4  :headscratch:
ESC: home made
servo: 8grams e-sky
lipo battery Hyperion 2S/400mamp/7.4volts
rudder: coroplast
boat: packaging foam-hot wire cut from cardboard templates
futaba 4CH rc set

basically the motor work efficiently at around 30watt and the battery has a maxi. discharge of 50watt i was getting about 10 to 13mins of run time with varying throttle.

hope his was of some help sorry should have posted earlier  :banghead:

the boat project originally started in 2007 as a free boat thing n ended up as rc boat  ;D PS: http://www.indiarc.com/forum/index.php?topic=1320.0

bye

sahil

oh yeah the RPM i don't remember correctly but was around 10k or above  :headscratch:

 :thumbsup:
     Sir in  future if u make a proto type ( ie  which can fly in air move in water and on land ) then pls do send me ur models blue print
can teach m how to make a low power boat
     great creativity
               {:)} {:)} {:)} {:)} {:)} {:)} {:)} {:)} {:)} {:)}

Fixing a couple of fins ( like a shark fish has) at rear end bottom of the boat can reduce the dragging while taking high speed turn.
And I am interested to know the homemade ESC for brushed DC motor.

Maharana, any diagrams for the placements of the fins?
Sahil, details of the homemade ESC for brushed motors please.......

Sir, I have never used fins before but a little experince in sailboats, you have to consider the weight of the boat and judge correct location for fins to reduce the dragging effect and big fins may flip the boat. Also the drag can be reduced by creating multiple lines at the bottom.