Speed - RC Nitro Boats For all your rc nitro fuel burning boating needs.

1/8th Scale Hydroplane Build

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Old 01-06-2016, 07:30 AM
  #26
Hydro Junkie
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You really have a choice.
1) You can use what I do which is a piece of MDF or particle board screwed to a pair of 2X2s after being cut to width. I like to be roughly 1/16" narrower than the planned width of the tunnel of the boat. I also have supports fastened to the inside of the 2X2s so that I can clamp the boat down without having to find something else to support the jig. I leave this flat so that I don't have to work around a raised area
2) You can take some MDF or plywood and cut it to match the bottom profile and attach two pieces to the top of that. The tricky part with this is you have to make sure the jig and bottom profile are an exact match or you could end up with a twisted hull. Since Mike's kits are tongue and slot, you shouldn't have too much of that to worry about.
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Old 05-08-2017, 09:10 PM
  #27
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Time to resurrect this thread again. After several months of not working on the Pak, I'm back at it, along with a new "big sister", a 1978 Miss Madison gas scale. I'll see about posting pictures in the next couple of days.
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Old 05-08-2017, 11:21 PM
  #28
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love to see the gas scale hydro.
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Old 05-09-2017, 02:29 PM
  #29
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Crapshooter, it's still under construction, just like the nitro scale Pak. I'll post a shot or two tomorrow of how far I've gotten.
One thing to be aware of is I've had to totally redesign the gas scale due to the frame spacing and correcting errors I found when I got measurements off the full sized Pak at the HARM
What I discovered is Roger drew plans for another similar boat and adapted them to make the Pak. This is most evident in the location of the firewall, which is too far aft, and the airtraps behind the sponsons, which are actually drawn more like on the 1974 Valu Mart.
I've corrected both of these issues on the gas scale during my redesigning and will be fixing these issues as best I can on the nitro scale

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Old 09-07-2017, 02:43 PM
  #30
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Okay, now that it's been almost four months, I figure it's time for an update.
Between work and other "required" activities, the boats have had very little done on them. The Pak now has both nontrips, the side panels aft of the sponson transoms, installed. I've also started to rework the air traps and sponson bottoms to match the full sized boat's left sponson. I could not use the right sponson's measurements since it was replaced after an accident in Mexico in 1981 with a different design made from fiberglass so using it isn't an option. To take it one step further, when Ron Jones replaced the right sponson, he made it four inches wider than the left, mostly for aerodynamic reasons.
As for the gas Madison, I've epoxied in the engine bay walls and the relocated firewall. The engine bay walls have been modified to their actual appearance as I've removed the plywood where the flashpans will go and have started laying out where to glue the plywood that will make the flash pans. This will be a modification I'll be making on the Pak as well since I've layed out where the firewall will be going and now have a general idea where the flash pans will go. The part that makes the flash pans difficult is that they are twisted. The front of the pans have a flat bottom, the rear is twisted to 45 degrees due to the depth of the pan's inboard edge as the bottom is almost parallel with the bottom of the boat.
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Old 09-11-2017, 06:49 AM
  #31
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If ya take off those dancing shoes , you might find time to complete these more important projects!!
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Old 09-11-2017, 07:51 AM
  #32
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DUDE, IT'S NOT DANCING SHOES, IT'S WESTERN BOOTS AND DON'T YOU FORGET IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Actually, the boats get to take priority over other projects starting in October. Got the Elam repaired, only to oversleep and miss the race on Sunday so I get to put it on the shelf for the rest of the winter. That means the builds FINALLY get the attention they've not gotten all summer, that is if my work schedule allows it
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Old 09-11-2017, 08:17 AM
  #33
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Quote:
Originally Posted by Hydro Junkie View Post
DUDE, IT'S NOT DANCING SHOES, IT'S WESTERN BOOTS AND DON'T YOU FORGET IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (
My bad...
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Old 09-11-2017, 08:59 AM
  #34
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BTW Mark, the wife and I still owe you a lunch though, unfortunately, it probably won't happen for a few years, that is unless you come out west
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Old 10-20-2017, 05:00 PM
  #35
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After several months of not getting to touch any of my boat builds, I finally have gotten time to work on the Pak.
Today's task has been to start reworking the sponson bottoms to look more like the full sized boat's left sponson. Since the right sponson is not original to the boat and is wider than what was originally on the boat, I'm not trying to copy it's shape or look.
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