Zipp 30" tunnel update

Help Support intlwaters.com:

Geraghty

Well-Known Member
Joined
May 16, 2003
Messages
1,602
We are still moving forward with this effort......It is lookin' good.....🤞

First time in the water run for the 2nd Zipp prototype


Second run.....Just changed prop .... probably picked up 5mph......needs a bit more set up time but we are very close......

This #2 prototype boat was rigged as an FE.....just because it was easier ..... the first prototype was nitro and it handled just the same.....we made some very subtle changes to the 2nd prototype and it did help the boats overall performance.......
The third prototype now being built was the first [possible production] boat out of the laser cutter and it is just about finished..... This boat will be sacrificial....after being tested again with as many runs as necessary , it is going to see the bandsaw.....This "bandsaw" effort will be done in three phases and testing after each change.....The "bandsaw" attack mission will be to simplify construction techniques , test an improved stumble block and finally improve the boats ability to resist blow-offs when it is set up loose and make the boat "stuff proof"......no more spear fishing with a 30" tunnel....These design changes will also really help the boat run in nasty water.....
A major design consideration has been is we want this boat , with confidence ,to finish 6 laps and come back to the beach.......
The final step will be to build the first and final "production boat"and functionally test that boat.....
With covid - 19 still flaming ......development time is really not a pressing consideration so we are taking the time to do it right......when the boat is finally released for sale it will have spent a lot of successful time on the water....
More videos will be posted as we make progress on this effort.....
 
Last edited:

Kris Flynn

Well-Known Member
Joined
Mar 11, 2002
Messages
4,194
Holds the nose up well in the corners...love the work you guys have done with this project!

Cannot wait to see how they perform in the racing scene!
 

Mark Anderson

Well-Known Member
Joined
Nov 22, 2002
Messages
633
Jerry, I have prototype number one. It is every bit as fast as my old boat, but not nearly as on the edge. I raced it in Duval this year. The boat in the above video has a few changes. These are going to be great little boats.
 

twox45

Well-Known Member
Joined
Jun 24, 2006
Messages
322
The motor is a Lehner 1940 either a 7 or 8 wind. (right around 2000Kv) We were running a 5000ma roaring top 70c. The controller is a Hydra Ice 240. The first run was with 38mm prop and it was peaking at 140 amps. The second run was with a 1440 and the current went up about 160 amps. Going to put a Lehner 1950-6 on it and some ABC props and see what happens. The motor angle was neutral and the bottom of the shaft was level with the bottom of the sponsons. If you want any pics just let us know.

Thanks to Mike Walker who built and painted the boat and Rick Grim who rigged the boat. If it hadn't been for them it would still be sitting on my build table.
 
Last edited:

Terry Keeley

Well-Known Member
Supporting Member
Joined
Jul 24, 2002
Messages
6,654
Looks great guys!

Got any pix of the back of the boat?
 

Geraghty

Well-Known Member
Joined
May 16, 2003
Messages
1,602
Holds the nose up well in the corners...love the work you guys have done with this project!

Cannot wait to see how they perform in the racing scene!
The boat should be fine in race water , Mark Anderson raced prototype #1 it last fall in some very nasty water and it was solid and reliable......It won the heat , finished and came back to the beach.....
The nose up ride attitude in the corner is all a "mechanical" function of the stumble block design and the blocks placement under the boat.......There still a couple of stumble block ideas I want to test on prototype #3.....
The best part of this effort is it still appears that the price point of this kit will be well below $100.00.....
Maybe we will be able lure in some RC Boating newbies to try the RC boating discipline......
Only time will tell...... 🤞
I also want to thank Rick Grim , David Hall , Joe Petro , Mark Anderson and Mike Walker.....This has been a joint venture effort to bring a tunnel to the RC boaters that didn't require the killing of a VISA card limit to complete....
 
Last edited:

HTV Boats

Well-Known Member
Joined
Nov 8, 2006
Messages
2,381
Nice to see this project coming to completion. At 160 amps you still have room for props. Good looking runs and times will break 30 sec easily.
At a C-note price tag with a 36X60 and Flycolor 150 adding another $100 this could be a great FE P/limited boat capable of 50mph.
Mic
 

Wally Marsh

Well-Known Member
Joined
Dec 5, 2003
Messages
884
Great update coming from Rod and the team. Looking forward to the production release, would be a fun build project for me and the grand kiddos!
 

Julio Almazan

Well-Known Member
Joined
Apr 12, 2009
Messages
97
Hi:
the first prototype was nitro and it handled just the same.....we made some very subtle changes to the 2nd prototype and it did help the boats overall performance......
Do you have a .21 glow outboard motor version in mind? If so, what motor could be installed?
Very good work, by the way ... with that setup, it looks great
 

Geraghty

Well-Known Member
Joined
May 16, 2003
Messages
1,602
Hi:

Do you have a .21 glow outboard motor version in mind? If so, what motor could be installed?
Very good work, by the way ... with that setup, it looks great
Read this thread in its entirety......


David Hall , as we speak , is currently designing an outboard motor adapter for .21 a car motor with a SG shaft.....this will mount on any outboard lower unit that starts the motor with an encapsulated belt in the adapter.....This will make any .21 motor , by definition , an outboard motor........The reference photo is of the 12 motor adapter made by David.......
You will no longer be required to have a dedicated outboard motor with a PTO and a reverse direction crankshaft.....
The .21 adapter is similar to this one shown in the photo.....You can see in the thread I referenced we have tested this adapter design approach with great success.....
Fred Howe at Lawless already has .21 adapters ready for sale to be used with car motors.....
 

Attachments

Geraghty

Well-Known Member
Joined
May 16, 2003
Messages
1,602
with the carb pointing down will water being sucked in be a problem?

No it isn't a problem......
Once again read the Food for thought thread referenced in message 18.....
The following video is of the boat being run with a car motor mounted on the adapter by Lawless....
There is a spray shield on this adapter....."no water spray problems whatsoever".....
It just wasn't mounted on the 12 motor adapter in the photo in message 18 at the time the photo was taken.....

Second run with $70 outboard power head. - YouTube
 

Latest posts

Top