RPM question

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Rvfixer
    Junior Member
    • Oct 2011
    • 6
    #1

    RPM question

    Hi guys, first time poster here, and a bit new to electric boats, (not new to rc thought)
    I think my question is along the same lines as the one that Wave skipper recently posted about upgradeing to a larger boat, but here goes..... its kinda long winded, sorry.

    I have read a few places that for sport boats its good to stay with in the 25000-35000 rpm, is the true? if so it brings me to the next part of my question...

    Im looking at buying the hobbyking ospray boat, and it comes with a 4074 size 2200kv motor and they are recomending running it on 6s, so if i do the math 22.2volts x 2200kv= 48840rpm thats much higher then the recomended range...
    could i run this boat on the 4s batts i already have 14.8volts x 2200kv= 32560 rpm ???

    the way i see it, the better choice for me (the recreational sport boater) would be to run 4s, or am i totally lost and out to lunch???

    Thanks for any advise you guys can offer.
    Rvfixer
    Tags: None
    • JonD
      Senior Member
      • Jun 2011
      • 129
      #2
      No, you're not lost and out to lunch!. 6S is too much for the 4074 2200Kv, and so is 48840 RPM.

      4S would be a far better bet in my opinion. Most guys on this forum seem to run 4S with this motor.

      Jon

        Comment

        • martin
          Fast Electric Addict!
          • Aug 2010
          • 2887
          #3
          As said the 4074 - 2200kv is a 4s motor, the 4074 motor is to small for the 41" Osprey hull. Most that have this hull fit a larger motor like a Leopard 5692 - 1390kv & use 6s or one of the Hobbyking motors of a simular size to keep costs reasonable. If price is not of concern then they use lower kv & run 8s or 10s, the Osprey is a big boat.

            Comment

            • Rvfixer
              Junior Member
              • Oct 2011
              • 6
              #4
              hey guys, thanks for the replys, big help!!
              I think i will indeed get the osprey and run 4s for now, then upgrade in the future as martin suggested.

              Take care everyone
              Rvfixer

                Comment

                • Basstronics
                  Fast Electric Addict!
                  • Jun 2008
                  • 2345
                  #5
                  The 4074 would look tiny in the Osprey.

                  I got one coming in and Im going to drop a 5692 into it. Size does matter
                  42" Osprey, 32" Pursuit, 26" Bling Rocket (rescue), Blizzard Rigger, JAE 21FE rigger, Hobby King rigger (RIP)

                    Comment

                    • Rvfixer
                      Junior Member
                      • Oct 2011
                      • 6
                      #6
                      what would i be looking at for an Esc in order to handle a motor like the 5692?

                        Comment

                        Previous template Next
                        Working...