Page 6 of 9

Re: Barrelback-20 Louisville Kentucky

Posted: Thu Aug 01, 2019 7:28 pm
by kens
monitor wrote: ā†‘
Thu Aug 01, 2019 6:44 pm
Looks like that 1to1 tranny is coming out of the Supra! It has a nice prop shaft, strut and flange on it also. Shaft may not be the correct length of course. Glad I purchased the Supra now!
Let me get it out and I will get back to you guys...thanks again.
There you go !!! I been waiting for that.......!
Make the same mockup as you did for the reduction gear, except; use the 1:1 tranny, it's shaft, it's strut, it's prop, et al, and then graft the Ford in lieu of the 454.
Also, notice on the mockup, where is the CG or CB from the plans layout, on the mockup.
The plans CG is a important number to hit. (you can cheat it and move aft but never forward)

Re: Barrelback-20 Louisville Kentucky

Posted: Sun Aug 04, 2019 1:44 pm
by monitor
Bolted the 1:1 Velvet Drive onto the Ford, hardest part was getting it out of the doner boat because of the weight.
Reworked the engine/tranny mockup and no changes in the drive train need to be made. Engine sits as drawn in the plans and at the proper angle, 14 to 15 degrees to the setup level.
Plans only dictate that the engine sit as far forward in the engine compartment as possible, no CG info given.
I'm happy! Thanks for the help everyone!

Re: Barrelback-20 Louisville Kentucky

Posted: Sun Aug 04, 2019 5:34 pm
by kens
Out of curiosity, what shaft diameter,
and what prop goes with that 1:1 Ford setup now?

Re: Barrelback-20 Louisville Kentucky

Posted: Sun Aug 04, 2019 6:07 pm
by monitor
I used the MC 1-1/8" shaft, strut, and Federal 14x18 LH cup prop for the layout.
I may pull the Supra 1" shaft, strut, and DJohnson 14x13 LH cup prop tomorrow to check the shaft length, and strut dimensions. Then decide which to use.
Props can be sold or possibly cut down to 12"?
Suggestions?

Re: Barrelback-20 Louisville Kentucky

Posted: Mon Aug 05, 2019 3:57 pm
by kens
The Supra 1" shaft, strut & prop is the better idea from the start

Re: Barrelback-20 Louisville Kentucky

Posted: Mon Aug 05, 2019 7:42 pm
by Mr Hot Rod
To determine gearing and propeller size to attain a desired speed, we will require more input before we can run the Shaft HP VS Speed Calculator :
  • Max BHP
    Max RPM
    Gear Ratio
    Weight
    Required maximum speed (MPH)
We''ll post the results as soon as you provide us with your data.

____________________
Paul Kane
Kane Custom Boats Ltd.
Chelsea, Quebec

Building the Glen-L Hot Rod : http://www.kanecustomboats.com
Glen-L Hot Rod build thread
Kane Custom Boats YouTube channel
Glen-L Boat Video Directory

Forum Support Knowledge Base

Re: Barrelback-20 Louisville Kentucky

Posted: Tue Aug 06, 2019 5:57 am
by kens
Mr Hot Rod wrote: ā†‘
Mon Aug 05, 2019 7:42 pm
To determine gearing and propeller size to attain a desired speed, we will require more input before we can run the Shaft HP VS Speed Calculator :
  • Max BHP
    Max RPM
    Gear Ratio
    Weight
    Required maximum speed (MPH)
We''ll post the results as soon as you provide us with your data.

____________________
Paul Kane
Kane Custom Boats Ltd.
Chelsea, Quebec

Building the Glen-L Hot Rod : http://www.kanecustomboats.com
Glen-L Hot Rod build thread
Kane Custom Boats YouTube channel
Glen-L Boat Video Directory

Forum Support Knowledge Base
Paul,
I see you finally arrived to the point you need weight and HP into the formula, as I mentioned back on Aug 1.
All this charts and data is getting off topic of the OP. This extra charts and math is too much for the OP intent.
The OP has 2 donor boats and he wants to use the parts on hand, the 1:1 driveline is his best choice, we do not need all the charts and math to come to that conclusion.
Empirical data is conclusive enough:
1. Dave Lott had a 1.2 gear in Riviera, and he ran out of prop size, he was forced into custom prop size to hold engine RPM
2. Butch has a 1.2 gear, but he has a 25' boat, another foot of beam, and 1,000lbs weight over the OP.
3. All the other V8 guys at Gathering are 1:1 and use a 13x13 or 14x14 prop just fine and dandy
4. The chart you posted about hang the largest prop diameter possible, is not totally true. True for trawlers yes, but not planing hulls.
5. Read Gerr's book again, you're missing a lot
6. Planing hulls accept smaller diameter props, but trawlers accept largest diameter
7. 1.5:1 gear and 14x18 prop on a little hull like OP would have a tremendous prop walk in reverse, his rudder will be totally useless in reverse
8. 1.5:1 gear in a small hull like OP and he will likely run out of prop as Dave did in item #1 above (ie expensive custom)
9. I have personally run prop sizes from 14x17, 15x15, 16x16, 16x18, 17x14 4blade, the large diameter is not needed in calm water on plane.
10. The OP is not taking his BB offshore in 6' following seas, he doesnt need that kind of torque from a reduction gear
11. The OP has a 1:1 with 1" shaft, 13 or 14" prop already on hand, empirical data will show that to work fine and dandy
12. The 15x18 1 1/8" prop is not as easily exchanged for sizing, as a 14x13 1" will be. he can find these on Ebay.

Re: Barrelback-20 Louisville Kentucky

Posted: Thu Aug 08, 2019 5:48 pm
by monitor
Supra 1:1 tranny and all worked out fine so that is the plan now. Thanks for the advice everyone!

Re: Barrelback-20 Louisville Kentucky

Posted: Sun Aug 18, 2019 2:36 pm
by HurricaneDR
Hey, Iā€™m over in Evansville and planning a Torpedo build starting this fall. Would love to stop over sometime and see your build

Re: Barrelback-20 Louisville Kentucky

Posted: Sun Aug 18, 2019 3:08 pm
by monitor
Awsome! Can't wait to see that build. Give me a call or text any time, and come over. 681-3415

Re: Barrelback-20 Louisville Kentucky

Posted: Tue Oct 29, 2019 5:55 pm
by monitor
Drilling holes in the boat...progress!
I am using a 1-3/4" OD stainless tube to make a hole saw. Another piece will be epoxied in place as a shaft log.

Re: Barrelback-20 Louisville Kentucky

Posted: Sun Nov 03, 2019 6:09 pm
by monitor
Side and transom planking complete. Can't wait to start sanding. :lol:

Re: Barrelback-20 Louisville Kentucky

Posted: Tue Nov 05, 2019 12:32 pm
by CarlM
Wow Jim you are just moving right along. The planking looks great. I think we all are just chomping at the bit for some more sanding. Lol. Did you have any issues with your homemade hole saw? I would assume they may have a tendency to wonder. Keep it up she is looking great !!!

Re: Barrelback-20 Louisville Kentucky

Posted: Wed Nov 06, 2019 2:26 pm
by monitor
Thanks Carl. Honestly I'm waiting to do any sanding until I'm sure I can get stain and a coat of epoxy on fairly soon. The wood seems to change color pretty quickly as it sits.
The hole saw is 8" long, so once it penetrates a few inches it guides itself. Unlike a short one. Had to sharpen it with a die grinder twice during the cut. Did not harden the teath.
Haven't seen a update on your boat in a while...

Re: Barrelback-20 Louisville Kentucky

Posted: Thu Nov 07, 2019 8:47 am
by CarlM
Yeah I suck at doing updates. I will take some photos this weekend and do an update. I have all the plywood on and just starting to layout how i want the mahogany to look. I still need to figure out where I want to get the engine from. I have been procrastinating. šŸ„“