Kyosho Jet Viper

[haggis]

Been out of the RC scene for a while so i'm not used to this brushless and lipo crap

after watching the nqd sickly powerful video -----> http://www.youtube.com/watch?v=jOdSAX0gH5k

ive decided i want to do that but on a bigger scale

i want a brushless motor, jet drive with reverse and lipos


since i allready have a kyosho viper i looked for one and got another on ebay for 15 pounds delivered, thats around 25 dollars!

its just the right size for me as ive got a mini v and wanted something just a bit bigger





i have absolutely no clue which motor to go for, what ill need to go with it and whats a good battery for it.

any help would be great

[Arctic Fire]

I am 99% sure that video is sped up, so don't expect those results unless you have a video camera and windows movie maker. The boat defies physics a few times, and the waves move so fast they look like they are made of redbull.

[haggis]

boat arrived yesterday and looks to be not bad for possibly a 15 year old hull.




went to the model shop today and bought an overlander thumper 3536 1450kv motor and a 40amp speed controller. not as big as i planned on but itll get me on the brushless route. the lipos were out of stock so ill try it on a nicd to start with.



cant wait until the weekend. i'm going to try it shaft driven at first until i get the electrics working. should be able to get the motor mounted.

ive also ordered a UJ to connect the motor onto the shaft and a water cooling jacket for the speed controller

[haggis]

well some of the parts arrived really quickly so i drove to the model shop and bought a 3s lipo 5000mah with a 25c discharge and a ripmax charger.

its a programmable balance charger but i have no idea what rate i should be charging and for how long.

i gave it a go anyway after i fitted the motor and electrics.




first run was not so great. i think the prop is too close to the boat for choppy weather and its causing the boat to cavitate a lot!!!

its also a bitch to steer, steering trim is so far over when you let off the throttle the boat does a sharp turn!!!

http://www.youtube.com/watch?v=sjjQXZxJ4LQ

i then tried the next day first run was a bit short, and the run after this video it cavitated a bit too much and blew the universal joint to pieces.......DOH!

http://www.youtube.com/watch?v=RcZTKkV8Ur0

cant wait for the twin rudder and new prop to arrive. its badly needed!

[haggis]

im too impatient for the jet drive so im going to build a separate jet boat as this one is getting faster.....a lot faster

A couple of new props arrived. the 2 blade fitted the original shaft ok but wasnt very well centered. i got a new 4mm shaft from the shop with a bit more length and what a difference!!!

Original prop at the top, x438 2 blade in the middle and x435 3 blade on the bottom






I had to try the 3 blader first. Unfortunately i didnt think about the amps this would create!




3s with a 1450kv motor probably draws a bit more than the 40amps my esc could provide.

its the first time ive had a boat stuck on full throttle, flipped and sank all in one go!!!

wish i had a video of it, it was quite a scene

[haggis]

have also removed the original stickers which were wrecked.

i used cream bathroom cleaner and it did a tremendous job, ideal for plastic boats

before after

also put some flags over the now super white boat

just need to find some blue sponsor decals to go with it

[rearwheelin]

Coooool !!! Now were do I get the bathroom cream !! Ha ha ha ha... Sweet post !

[haggis]

doh!

this week the postman brought some team infinity allen drivers




a nice prop nut and dog drive for the 4mm shaft and the twin rudder set up



however the twin rudder should have came with a warning. you really should measure the boat before you order this

[haggis]

jet drive has arrived, and ive done something stupid!

too much youtube makes you do silly things

http://www.youtube.com/watch?v=Gin68TIr2Rg

after watching this i wanted whats called a Dockstavarvet combat boat 90 or cb90




the viper really pissed me off by blowing its motor and getting stuck out on the water so out came the hacksaw!!!

[haggis]

nearly ready to rip out the shaft drive.




just waiting on the new turnigy outrunner so i can install the entire drive system in one go

i am also going to make some bulkheads out of perspex to stiffen the hull and deck up a bit.

the old deck is so badly twisted that there is half an inch gap when the lid is on.

hopefully ill be able to make it look a bit like a CB90!