February 21, 2018, 06:07:32 PM


Author Topic: Waterbug prop / drive test.  (Read 277 times)

Online D45/70

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Waterbug prop / drive test.
« on: February 02, 2018, 04:02:02 PM »




Well.
I did some more welding to make the prop tower absolutely ridge.
I did a dry running of the prop and drive at full power.
Every thing looked true and I felt no vibrations or odd sounds.
I did not run it long The clutch kicked in at 1500 rpm and at 3200 it
Had moved to it's extreme extent.
It is supposed to start at a 3 to 1 reduction then at full it should be at
near 1 to 1.
I was having a problem hand working the gas ,watching the motor tack, and
the lazar tack on the prop. But it looked like at 3200 motor speed it was 3100
prop speed. I was using my wooden 64" 34 prop.
It spun up to speed as fast at I could move the throttle.

I'm hoping the 3 blade 54" will load the motor a lot more, Or I'll need more prop.












DO to the increasing cost of energy, Gas,and Electricity. The Down turn in the economy.
The light at the END of the TUNNEL is Now TURNED OFF!!!

Offline John Andrews

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Re: Waterbug prop / drive test.
« Reply #1 on: February 02, 2018, 05:07:24 PM »
Wow! That's a lot of power, D! You have room for a larger prop?
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Online D45/70

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Re: Waterbug prop / drive test.
« Reply #2 on: February 02, 2018, 09:16:20 PM »
I have a 64 now and could go to 66 max.
 I will increase  the pitch on the 3 blade to get "MORE" prop.
DO to the increasing cost of energy, Gas,and Electricity. The Down turn in the economy.
The light at the END of the TUNNEL is Now TURNED OFF!!!

Offline John Andrews

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Re: Waterbug prop / drive test.
« Reply #3 on: February 03, 2018, 05:38:47 AM »
I have a 64 now and could go to 66 max.
 I will increase  the pitch on the 3 blade to get "MORE" prop.
  O0 Sounds like she runs good and maybe will run on the water a lot faster than you figured. Maybe rename her the Water Bullet?  :wink:
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Online D45/70

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Re: Waterbug prop / drive test.
« Reply #4 on: February 04, 2018, 10:50:59 AM »


https://www.youtube.com/watch?v=okmCg_1_1D0&feature=youtu.be
DO to the increasing cost of energy, Gas,and Electricity. The Down turn in the economy.
The light at the END of the TUNNEL is Now TURNED OFF!!!

Online MOSPARKY

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Re: Waterbug prop / drive test.
« Reply #5 on: February 04, 2018, 09:22:32 PM »
Have you considered a variable pitch prop ? I know they are used in some aircraft and most likely are not cheap. Need to way that against how much experimenting with this prop and that is gonna cost you. I have no clue what any of this actually cost.
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