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    Seasick John
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    Member No.#1730
    RegisteredπŸ“…30th Mar 2012
    Last OnlineπŸ“…18th Sep 2014
    CityπŸ“Tyne and Wear
    CountryπŸ‡¬πŸ‡§United Kingdom
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    John
    Recent Posts
    πŸ“ crash tender
    9 years ago by Seasick John ( Able Seaman)
    Flag
    Thanks Dave & Gregg,
    Feels like I'm now going forward with this project. Will consider both motors Graupner 600/700 & "550" motor defiantly a bigger ESC.
    Will let you know progress. thanks again John

    graupner
    motor
    esc
    crash tender
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    πŸ“ crash tender
    9 years ago by Seasick John ( Able Seaman)
    Flag
    A bit more information:
    Battery connected in parallel
    Prop - Brass 3 bladed aprox dia 35/37mm

    Motor - Graupner Speed 500 E (Nr.7306)
    Nominal 7.2volts
    Operating voltage range 3.6 ... 8.4 V
    No-load speed 22500 min-1
    Idle current drain approx 2.5 A
    Current drain at max. efficiency 17A
    Blocking current drain approx 85 A
    Max. efficiency approx 70 %

    Prop shaft nicely aligned & runs freely (No binding)
    Planning to use water pump on a separate battery.

    Thanks for info, looks like the motor I'm using might not be up to spec??

    brass prop
    graupner
    motor
    prop
    voltage
    water pump
    battery voltage
    crash tender
    battery
    prop shaft
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    πŸ“ crash tender
    9 years ago by Seasick John ( Able Seaman)
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    My up date on refurbishment:
    Having read above, I now relies my motor / ESC set up is totally crap and after test on the local pond, found out the hard way (Continuously popping 15/20 amp fuses)
    My set up:
    My Transmitter / Rec 2.4 GHz Planet
    Motor - Graupner Speed 500 E
    ESC - Montroniks 20amp
    Batteries - NI-MH 7.2 3700mAh (x2)
    Also note fitting a 6v/12v water pump for working fire 'squirtey' hydrants.

    So which forward,
    Go brushless (Totally new to me!!) or more conventional set up replace ESC & motor to more suitable set up?

    Was thinking of trying a 50 amp ESC with my existing set up...?
    Any advice welcome?

    advice
    brushless motor
    graupner
    motor
    refurbish
    brush
    esc
    batteries
    transmitter
    brushless
    water pump
    fuse
    crash tender
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    πŸ“ Roker Park Model Boat Club
    9 years ago by Seasick John ( Able Seaman)
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    http://rokerparkmbc.webeden.co.uk
    πŸ”—
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    πŸ“ crash tender
    9 years ago by Seasick John ( Able Seaman)
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    Brian,
    Currently doing a similar project as your self.
    Gifted a very old crash tender first built in 1956...
    As can be seen in very poor state with all fittings missing. Boat size is 34" (1/16 scale), so will be looking for a full set of fitting in the near future.
    Started stripping down boat, plus waiting for some plans from e-bay.
    Will keep posting progress like your self, hope we can help each other as we progress.
    Question: what size is you boat?

    fittings
    plans
    e bay
    crash tender
    posting
    built
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    πŸ‘€ 1 Views


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