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Hunting Main Board => Just Jawin At Camp => Topic started by: D45/70 on February 02, 2018, 04:02:02 PM

Title: Waterbug prop / drive test.
Post by: D45/70 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.

(https://s26.postimg.org/5tmrft6s9/PART_1517511949687_PART_1517511948322_Image1517511948286.jpg)
(https://s26.postimg.org/6j5js5zm1/PART_1517511907821_PART_1517511906554_Image1517511906510.jpg)
(https://s26.postimg.org/l2cotmih5/temp.jpg)








Title: Re: Waterbug prop / drive test.
Post by: John Andrews on February 02, 2018, 05:07:24 PM
Wow! That's a lot of power, D! You have room for a larger prop?
Title: Re: Waterbug prop / drive test.
Post by: D45/70 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.
Title: Re: Waterbug prop / drive test.
Post by: John Andrews 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:
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on February 04, 2018, 10:50:59 AM


https://www.youtube.com/watch?v=okmCg_1_1D0&feature=youtu.be (https://www.youtube.com/watch?v=okmCg_1_1D0&feature=youtu.be)
Title: Re: Waterbug prop / drive test.
Post by: MOSPARKY 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.