Prop upgrade - RC Groups
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Jun 18, 2012, 02:44 PM
Registered User

Prop upgrade

Now that I am using my Smit Nederland to haul my logging barge, I noticed that it takes its time to get some speed on when the barge is loaded with logs. (especially on a windy day). So, purchased a couple of 50mm left and right 4 blade props. Fit very nicely into the kortz nozzles. The original kit came with 45mm 3 blade props. Don't think there will be any overheating problem with the motors, as I ran all day hauling the loaded barge and they were not even warm to the touch. Am using an Mtroniks viper 40 marine esc, so should have no problems there. Eager to get them all out on the pond.
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Jun 18, 2012, 03:44 PM
"Take the Cannollis"
Steve Bad's Avatar
Nice fit... If they were just one RCH bigger, you would have been out of luck.
Jun 18, 2012, 11:40 PM
Registered User
CaptCB's Avatar
Try using Kort Nozzle props, with about .045''-.060'' blade tip, to nozzle, clearance. Just remember, the barge does NOT, have brakes!! Have fun. CaptCB
Jun 19, 2012, 05:19 AM
Registered User
If the original props were converting maximum motor power to moving water at max efficiency, it is quite possible that bigger props would just increase the load on the motors. If there is no more power available from the motor, there is no more to put into the props. The loaded barges do represent an increased load, so slower acceleration than when unloaded should be expected, whatever the props are doing.
Agreed about the proper square ended one for use with Korts, though.
Jun 19, 2012, 07:33 AM
woodybob's Avatar
Something like this...
Jun 22, 2012, 12:44 AM
Keep a Steady Strain....
capntroy's Avatar
Originally Posted by woodybob
Something like this...
Yep, those are what I run on my nozzle boats; pick a high rpm motor, gear the heck out of it and put as much blade area as possible in the nozzle, if you can see sunshine, you don't have enough wheel...

If you want to avoid the expense of the Prop Shop kort props, just buy some Rivabo wheels that are a 1/4" larger than the ID of the nozzle and mill the tips off square to match the nozzle.

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