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Author Topic: HELP needed to kit out powerboat please  (Read 9246 times)

jms8186

  • Guest
HELP needed to kit out powerboat please
« on: October 30, 2011, 04:49:30 PM »

hi to all i hope ive posted this in the right place.

Im after some help with my boat i was given this boat and told it could be a cigarette hull
i want to kit the boat out with electric running gear but not sure where to start
also i want it to be a fast boat so a nice bit motor.
I have been told to go for everything watercooled but not sure what size bits i need.


If anyone can advise me on what to get i will be very grateful

many thanks james












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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #1 on: October 30, 2011, 05:13:04 PM »

whats your budget?
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jms8186

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #2 on: October 30, 2011, 05:25:14 PM »

between 150 - 250 also the boat is 41inch long and 9.5inch at widest point
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #3 on: October 30, 2011, 05:26:42 PM »

do you have radio gear?
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jms8186

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #4 on: October 30, 2011, 05:27:31 PM »

no all i have is the hull
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #5 on: October 30, 2011, 05:33:40 PM »

im afraid you will probably using most of your 250 pound budget as fast boat building is very expensive. Firstly you will need radio gear, i use a 2.4ghz fs gt2 system. Some people like them some people dont, its suits me well though and in the kit you get your transmitter and receiever, you might like this and some people might recommend something else but heres a link:

http://www.ebay.co.uk/itm/Flysky-2-4GHZ-Transmitter-Receiver-Radio-Gear-FS-GT2-RC-Boat-car-/220873489006?pt=UK_ToysGames_RadioControlled_JN&hash=item336d15fa6e

ill be back in a bit off to get some pizza
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #6 on: October 30, 2011, 06:07:23 PM »

what do you think?
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jms8186

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #7 on: October 30, 2011, 06:20:18 PM »

looks good.
i forgot to put the hull is fibreglass so has abit of weight to it but not to back.

i have been looking at other boat and wondering would it be worth spending the money on this project or to spend the money on a ready to run boat as ive seen some that do fast speeds for around 200  as i would like this hull to do around 50mph
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #8 on: October 30, 2011, 06:30:02 PM »

well heres what i think
1) 90 percent of the fun in model boating is the build!!!
2) you wont learn anything if you have your boat built by someone else
3) you can get 50mph out this boat and it will be a great achievement and credibility when you do so
4) youl be a proper model builder and no what your talking about when you build it yourself
5) you will be able to modyfy and upgrade this boat whenever you get the funding and will to do so

so in my oppinion i think thats a horrible idea. but thats me :}
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jms8186

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #9 on: October 30, 2011, 06:37:37 PM »

i have to say i think you have help me decided with some good point so i think the project hull it will be.
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #10 on: October 30, 2011, 06:47:43 PM »

good im glad cos this hobby needs more people involved and when you build one you get the "bug" and when your half way threw building this one youl have you next boat on the drawing board!!

Id just like to point out that if you havent driven an rc boat at 50 mph then ill warn you now to take a spare pair of trousers with you on your maiden run because watching your 250 beloved hard work tear across the lake will make your bowles move %% but when it does the sense of achievment is brilliant.

ok so youl need to go surface drive and brushless motor for those kind of speeds. and lipo batteries too. ill do you a shopping list so bare with me.
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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #11 on: October 30, 2011, 07:57:34 PM »

for performance and reliability youll use most of your money on decent motor and esc,dont bother with cheap piles of junk or it will cost you more in the long run
you'll want to run 6s at least and a 1400-1600 kv motor
lipos need to be at least 5000,30C constant rating
building is defo more fun,+ youll know everything inside out
you want to mount all the surface drive hardware 1st,turn fins,trim tabs etc before epoxying in the motor mount,batt trays etc
you want to start with around 28% CG with everything fitted but makeit so you can move your batts forward to increase the CG should you need to
Surface drive hardware go with HOR and 3/16 (4.79mm) flexi drive
youll need a decent MG Hi torque servo aswell
3 blade props work better on surface drive monos due to running smaller diameter
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #12 on: October 30, 2011, 10:49:43 PM »

im glad you filled in actually cos i just realised actually how big this boat is and im not use powering something of this scale. Do you think it can be done on a 250 pound budget? minus the 25 for the radio gear so thats 225.
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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #13 on: October 30, 2011, 11:27:27 PM »

Hi mike
Ill do a list with links of what I would use tomorrow when im on my comp
@ jms, I did notice you'll need a canopy/ hatch that can be sealed or taped down
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #14 on: October 30, 2011, 11:43:26 PM »

would prestwich hardware be sufficient?
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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #15 on: October 31, 2011, 10:30:39 AM »

this is what id run:
Leopard 4082 1500KV
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=24_114_115&products_id=1212
or
Leopard 4092 1300KV
 http://www.astecmodels.co.uk/catalog/product_info.php?cPath=24_114_115&products_id=1421
Cooling jacket for either
http://www.astecmodels.co.uk/catalog/index.php?manufacturers_id=45
Swordfish 200amp esc
http://www.astecmodels.co.uk/catalog/product_info.php?products_id=1413
Motor mount
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=22_42&products_id=1180
Coupler
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=1_43&products_id=929
Servo mount
http://www.prestwich.ndirect.co.uk/wpnnnnme1C.jpg
Servo
http://www.ebay.co.uk/itm/15kg-METAL-GEAR-High-Torque-Servo-Futaba-Spektrum-JR-/370553762233?pt=UK_ToysGames_RadioControlled_JN&hash=item5646b9b1b9
Stinger,stuffing tube and flexi set
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=1_79&products_id=178
Rudder
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=1_120&products_id=244
Turn fins
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=1_36&products_id=1008
Trimtabs
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=1_36&products_id=841
Through the hull cooling
http://www.prestwich.ndirect.co.uk/waape12.jpg
cooling exit
http://www.prestwich.ndirect.co.uk/aluA.jpg
Cooling pipe
http://www.prestwich.ndirect.co.uk/images/s1s2small.jpg
bellow for push rod from rudder to servo
http://www.astecmodels.co.uk/catalog/product_info.php?cPath=22_34&products_id=111

Thats 300 and you gotta add delivery charges on top
then you still got lipos,charger,radio and props on top
Use 2 x 3s lipos in series placed either side of the motor this will help with the balance

41" boat is a decent size hull to push,especially when you say fast,youll be around mid 50's on this setup
you can do it cheaper but only the motor and esc will be cheaper the rest will stay the same

Then youve still got props,Lipos and charger and radio on


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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #17 on: October 31, 2011, 10:39:23 AM »

yep the joys of FE in big boats
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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #18 on: October 31, 2011, 10:45:40 AM »

found some cheaper leopard motors
4082,1600 kv
http://www.ebay.co.uk/itm/LEOPARD-Model-4082-KV1600-4-Poles-Brushless-Motor-IM147-/270756761844?pt=Radio_Control_Parts_Accessories&hash=item3f0a5c50f4
 they got the bigger motors aswell
Turnigy 180 ESC,these are good esc,but you will have to run separate RX pack when running 6s
http://www.ebay.co.uk/itm/Turnigy-marine-180-amp-brushless-boat-esc-/280739080049?pt=UK_ToysGames_RadioControlled_JN&hash=item415d5a6771

might be able to get these cheaper soon,as a friend of mine is setting up an internet shop,should be up and running in a month or so
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #19 on: October 31, 2011, 10:53:17 AM »

i found this equivalent:

http://www.hobbyking.com/hobbyking/store/__17698__XK4082_1500KV_Brushless_Inrunner.html

works out to be 42 plus pnp

what do you think?
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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #20 on: October 31, 2011, 11:07:55 AM »

looks ok,but never run any of the turnigy stuff and HK they aint got the best reputation when it comes to problems etc
but could be worth a shot for that much

The other thing i forgot is youll need to run 5.5mm or bigger bullet connectors on all connections inc motor.
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MikeA

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #21 on: October 31, 2011, 11:16:50 AM »

ill look about a bit more
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martno1fan

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Re: HELP needed to kit out powerboat please
« Reply #22 on: October 31, 2011, 04:46:06 PM »

Just my opinion but he could run a big outrunner and save quite a bit of money  :-)).The himodel ones are super motors a friend has two 910 kv ones in one of my 58 apaches on 6 s per motor clocking 50 mph,this is a big boat i think the 1100 kv one would give you a decent speed but there is a 1900 + kv version too but personally id go with 1100 kv and a decent size prop.The tunrnigy motors are also pretty good,i will be fitting two in a twin build for next spring.
Mart
http://www.hobbyking.com/hobbyking/store/__11102__Turnigy_T600_Brushless_Outrunner_for_600_Heli_1100kv_.html

http://www.himodel.com/electric/HiModel_PRO_Series_1100KV_Outrunner_Brushless_Motor_for_600-700_Helicopter_Type_HG3740PRO-3T.html

heres the twin navaho apache in the sea
http://www.youtube.com/user/waveridermouldings?feature=mhee
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F1 madness

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #23 on: October 31, 2011, 07:45:41 PM »

hey mart
imo opinion 1 of those motors on its own is not big enough on its own
the only reason his are reaching that speed in that size hull is hes running low kv on low volts for the kv so he can spin bigger props also theres 2 sharing the load
look at my saga cat it ran 2 x 2860 motors but 1 on its wouldnt of shifted it
i ran a 500 size outrunner in a 37" mono it struggled to get on plane but 2 of them would of been ballistic
from what th op said he wants it fast and 1 of them without running more than 6s wont b that fast,then hes looking big money for a HV esc

realistically this hull needs more than 6s in my opinion to make it really move along,but its big money and will cost nearly all his budget on decent HVesc
so iv tried to advise as close to his budget as poss but decent quality hardware and motor and esc
 
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Ade the Blade

  • Guest
Re: HELP needed to kit out powerboat please
« Reply #24 on: October 31, 2011, 08:20:44 PM »

Hi when you say one of those motors is big enough which one do you mean as i to have a hull of  about the same size and it has only one prop tube sorry to jump in but this is very interesting subject as i do not want to waste money on the wrong motor please help Regards Ade.
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