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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.
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on May 10, 2018, 07:30:07 PM
I got the elevator actuator hooked up and it moves them up and down, Yay . A tad slower then I planed but workable.
I used a car window motor.

https://www.youtube.com/watch?v=EVnymcUy9Rs&feature=youtu.be (https://www.youtube.com/watch?v=EVnymcUy9Rs&feature=youtu.be)

https://www.youtube.com/watch?v=EVnymcUy9Rs&feature=youtu.be (https://www.youtube.com/watch?v=EVnymcUy9Rs&feature=youtu.be) 
Title: Re: Waterbug prop / drive test.
Post by: John Andrews on May 11, 2018, 02:14:16 AM
 O0 That's a smart move, D! I would never have thought of that!
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on May 16, 2018, 12:35:20 PM
I found a trailer , needs some work !
It is 7 and 1/2 foot wide
12 feet long, the deck.
 AND needs some work.
 I got it for free, it has tires and a tidal.


(https://image.ibb.co/nPjxWJ/IMG_20180515_095532.jpg)
Title: Re: Waterbug prop / drive test.
Post by: John Andrews on May 17, 2018, 04:08:40 AM
Can't beat free, D! That work you will have to do is minor to what you have already done, for sure. You already working on the trailer?
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on May 19, 2018, 08:44:38 AM
OK, here is what I got.
RubberMaster 20.5x8 10 range F. There made in Indonesia.

 Rim Width (Inches): 6.0
Outside Diameter (Inches):  20.60
Section Width (Inches): 8.10
Max Load:  1549 lbs.
PSI:  90
Two tires and two white rims 5 hole.
My buddy the tire guy balanced them and will
mount one of the old ones on one of the old rims, for a spare.
$135.00
I had to replace a stud , 7/16 - 20 and I got some extra nuts, $8.00
I checked the bearings and they looked and felt ok, I repacked them with grease that may actually flow in cold weather. I'll change them and add Barring buddy  soon as I can. Never enough money or time .
Galvanized rims would be the best, but for now I'll just paint the white ones Camo ad call it good.
Now just re do the entire trailer for  cat, boat and it will be finished.

No deck on the trailer, I'll make a roller system over the area the "Cats " will set and off each end of the trailer.
One detachable tongue I can use like a receiver hitch on your truck , only LONG. It will run the full length of the trailer for support. I can use it in front and in back. I'm thinking about some kind of "Fan" lock to keep it from "Free wheeling " when going down the highway.

 
Title: Re: Waterbug prop / drive test.
Post by: John Andrews on May 19, 2018, 10:01:55 PM
 O0 Sounds good, D!
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on June 02, 2018, 03:29:29 PM
I needed some U joints for the steering on the waterbug.

There like $30 each on the computer, I need three.

They turn slow and only one revolution so I did not need precision just flex to change sides of the boat with My tubing. They fit over the 1" tubing I'm using.

Handle bars will turn a drum with cables to the tubing shaft.

The shaft will run the length of the boat to the back.

Then a drum back there too with cables to the steering arms on the rudders .

Closer by the day...

 







(https://image.ibb.co/nMss2d/uu_joints.jpg)



(https://image.ibb.co/kZcgvy/uuu_joint.jpg)
Title: Re: Waterbug prop / drive test.
Post by: John Andrews on June 03, 2018, 04:09:14 AM
 O0  Yes! They look good! You need one more?
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on June 03, 2018, 09:53:20 AM
I need three, but.
I'm not sure what size I need for the last one, depends on what I build the shaft with.
Title: Re: Waterbug prop / drive test.
Post by: John Andrews on June 03, 2018, 02:10:53 PM
I need three, but.
I'm not sure what size I need for the last one, depends on what I build the shaft with.

O0 Looks like you made those two, D. Looks fine.
Title: Re: Waterbug prop / drive test.
Post by: MOSPARKY on June 03, 2018, 09:48:06 PM
Looks like you cut them from conduit. Hope thy are  strong enough. I'd keep the drum diameter down to minimum to reduce the torsional stress on that thin wall tubing.
Title: Re: Waterbug prop / drive test.
Post by: D45/70 on June 04, 2018, 02:16:02 PM
It is steel conduit 1".
It only has to turn les then one revolution, I'm kinda sure it will holed the stress. 
Title: Re: Waterbug prop / drive test.
Post by: John Andrews on June 05, 2018, 02:39:21 AM
It is steel conduit 1".
It only has to turn les then one revolution, I'm kinda sure it will holed the stress. 

O0 It should. Need is the mother of invention.