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    Lesro Pilot power
    by NBT πŸ‡¬πŸ‡§ ( Master Seaman)
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    14 Posts 13 Replies 3 Photos 20 Likes
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    NBT
    Master Seaman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 3 days ago
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    Thanks for all the input everyone good info and good advice, received a nice big box today so just clearing some space out then onto the build.
    1
    canabus
    Midshipman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¦πŸ‡Ί Australia
    Online: 24 days ago
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    HI All
    Some brush rock crawler motor specs:-
    Voltage 7.2 and all rpm's unloaded.
    35 Turn 13,000
    45 Turn 9,500
    55 Turn 7,700
    65 Turn 5,500

    If you divide the voltage by rpm, you will get a brushless KV rating.
    e.g. 5,500 divided by 7.2 equals about 750KV.

    Props (Raboesch)
    Type D :- 35mm max rpm 10,000
    40mm max rpm 8,800
    45mm max rpm 7,800
    50mm max rpm 7,000
    55mm max rpm 6,400
    60mm max rpm 5,800
    ESC I use the Hobbywing Quicrun 60 Amp for 2-3S lipo.

    These have link set up for Lipo and NIMH batteries.

    The other link is for Foward/Brake/Reverse.
    On boats set to Forward/ Reverse.
    This is the only ESC I found that goes straight from Forward into Reverse !!!!
    Canabus
    1
    NBT
    Master Seaman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 3 days ago
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    I thought about using a crawler motor and ESC also as they are designed for torque and also the ESC can be set with all sorts of clever features like start mode and ramp up etc.
    2
    Ianh
    Commander
    πŸ“ Lesro Pilot power
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    Country: πŸ‡ΏπŸ‡¦ South Africa
    Online: 10 hours ago
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    In SA we use a lot of helicopters in Richard's Bay due to the tankers. The pilot boats aren't fast here
    Only old in years not mind or soul.
    NBT
    Master Seaman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 3 days ago
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    Thanks JBKIWI i was looking for a good colour photo for some reference and up one popped in your post.
    1
    canabus
    Midshipman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¦πŸ‡Ί Australia
    Online: 24 days ago
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    Hi All
    I have three Eileen/Hellen fishing boats running 540 Rock Crawler 80 turn brush motors on 7.2 volt Lipo batteries turn a 60mm 3blade prop.
    I have trimmed to throttle back to 60% because the boats were over speed !!!
    The motors run with no cooling .
    Canabus
    2
    jbkiwi
    Admiral
    πŸ“ Lesro Pilot power
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    Country: πŸ‡³πŸ‡Ώ New Zealand
    Online: 5 hours ago
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    We had 2 similar boats here, and they did about 16knts. The old Aust designed tri-hull pilot (1990) had surface drives (1000hp) and did around 30knts (the new cat does 40knts and the new big RIB does around 38 knts.) The big old displacement pilot boats were pretty slow (about 12knts), but they changed to the tri-hull (Waitemata) in 1990 due to having to get out about 12 miles to where the ships waited, and the volume of ships starting to arrive. The Waitemata reduced the travel time from 50 to 20 mins.

    JB
    1
    NBT
    Master Seaman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 3 days ago
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    Agree, i wanted some wriggle room on prop experiments and to allow ballasting options to get the boat moving realistically through the water ( appearance of weight ) . As i also want duration the plan was to use 2 Yuasa 12 or 6v PB batteries Ah rating dependent on size. Having 2 allows me to use them as movable ballast with them wired in parallel. I think the difference between the 850 and 800 is the 800 provides less performance but more torque 800 at 12v 4289 RPM ( unloaded ) 850 at 12v 9778 (unloaded ). Still un-decided though so any more thoughts good or bad welcomed.
    2
    Ianh
    Commander
    πŸ“ Lesro Pilot power
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    Country: πŸ‡ΏπŸ‡¦ South Africa
    Online: 10 hours ago
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    Hi NBT,
    All motors make a noise but once the water the sound goes down. An MFA 800 is a big moter I have an MFA850 in my Sea Queen which is 46". Best way remove red gearboc cover just pulls off and spray with white lithium grease quitens it down πŸ‘πŸ‘πŸ‘
    1
    Only old in years not mind or soul.
    NBT
    Master Seaman
    πŸ“ Lesro Pilot power
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 3 days ago
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    Thanks for the info it looks good but as i believe these motors can create quite a racket i think i will go back to simple and use a MFO Torpedo 800 direct drive to a 40mm 3 blade and then experiment with cheap props.
    2
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