electric conversion

[wildjaych]

I have an old Kyosho Jet Stream 1000 about 40" long and I dont know what the weight is but its a plastic hull deep vee boat. I want to put an electric motor in it so I dont have to deal with the nitro mess and tuning anymore. I am into electric planes also so I know a little about brushless motors and lipos but I think boats are a lot different, from what I read anyway.

Could someone help me with how to size a motor and speed control to fit this boat? Ive found a couple web sites that sell boat equipment but I am just more confused. I would like to get about 30-35 mph out of it like the nitro motor.

This is kind of what I have figured in my reasearch, I will need:
80-100 esc??
Dont know how to size motor???
3000-4000 20c lipo??

Am I going in the right direction?
Any help would be great.

Thanks
J

[Avanti]

you will need big $$ stuff for a 40" hull check out the build section for a boat that size
good luck with it.

[ReddyWatts]

KB 45 9XL motor (1400kv) water cool it
4S1p 5000mah 25 -30C lipo
120 amp 6S controller
M545 prop
80 amps
30 -35 mph
20,000 rpm
3.75 minute full discharge
Lipo 80% discharge is 3 minute run time

KB45 10XL (1200kv) water cool it
6S1p 5000 mah 25-30C lipo
120 amp 6S-7S controller
X445 prop
85 amps
35-40 mph
25000 rpm
3.5 minute full discharge time
Lipo 80% discharge is 2.8 minute run time

[Avanti]

<4 minutes that sucks

[SJFE]

<4 minutes that sucks

Thats avarage for a fast boat. Lets not scare away the newb just yet . I know Kyosho hulls. This one is carries just a little more weight but is much more rigid than a Super Hawaii, which is about the same size. Reddy has the setup nailed as always. You can also run a set of 36mm 1800 to 2000kv L size motors. Two 100amp esc's on 4s-1p. 37 to 38mm props for around 70 to 80 amps. Run times around 5 minutes. My 2 cents anyway.

[Avanti]

I never really timed myself but it seems like I run longer than 4 mins

I'll have to bring a stop watch next time I run.

[SJFE]

I can probably run 5 to 8 munites but thats running the packs to deep and risking damage. I need the stop watch & do the math my self. I have been getting carried away latley.

[wildjaych]

OK with all of this said. I would like about 8-10 minutes run time. Is there a brushed setup that could do what im asking. Maybe a double brushed setup?

Reddy,
I like the setup you gave me... but very pricey.....I would be better off with a new hull and electrics probably. Can you figure best brushed setup that you might know of. Maybe I could drop speed a little for a little more runtime???

Thanks so far you guys have given good ideas.

J

[SJFE]

You can drop the 9xl to a 10 or 11 parallel a set of 4s 5000mah packs, srub off a few MPH and pick up or get very close to the run time you are looking for. It is a little pricy but large hulls always are. The advantage of being able to run in more water conditions is well worth it IMO.

[ReddyWatts]

This brushed setup can be run on 12 cells at 35 amps for 6 minutes on the 4s1p 5000mah It will run in the lower 20's in your 40 inch hull.

http://www.offshoreelectrics.com/pro...prod=ose-700sc
http://www.offshoreelectrics.com/pro...prod=hl-je600n

This is another brushless setup you can run on 12 cells at 35 amps for 6 minutes of run time on 4s1p lipos. Will probably run mid 20's.
http://www.offshoreelectrics.com/pro...qug7000&cat=42
http://www.offshoreelectrics.com/pro...prb3309&cat=75

Water cool motor and controller on both setups. The longer you run the hotter they will get.

*You can purchase a SV27 RTR boat and it will run with your nitro for a reasonable price.*
It will have a 5-8 minute run time depending on which batteries you purchase.

http://www.offshoreelectrics.com/products.php?cat=52

[wildjaych]

After searching this site and others it looks like I can do this upgrade for about $120-130 dollars plus the cost of a battery.

Which motor is better? Aquacraft? Ferigo? Hextronic?

Also, This boat is a single prop, would it be better to run 2 motors through some sort of gearbox? on a single battery? or double battery? I havent seen any type of gearboxes on any of the site. What are my options there? Any info would be great.

Thanks for all the help.

J

[kin]

After searching this site and others it looks like I can do this upgrade for about $120-130 dollars plus the cost of a battery.

Which motor is better? Aquacraft? Ferigo? Hextronic?

Also, This boat is a single prop, would it be better to run 2 motors through some sort of gearbox? on a single battery? or double battery? I havent seen any type of gearboxes on any of the site. What are my options there? Any info would be great.

Thanks for all the help.

J

my bet be the feigao ,,, but it really depends how u gonna set it up at the end of the day , what kinda lipos and props???

[eboat]

There is not enough room in this hull to worry about 2 motors
1 bigger motor and esc is better than 2 smaller motors and 2 esc's (and cheaper)