Late War PT Boat - RC Groups
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Apr 29, 2012, 10:37 AM
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Gravman's Avatar
Build Log

Late War PT Boat

I decided to start building my Dumas 48" PT Boat. I've had the kit for many years and as everyone knows Dumas does not produce fiberglass hulls anymore. I'm not sure how many people still have this kit or could benefit from a build log about it. But, just in case there might be some interest I decided to start this thread. I will be using additional parts provided by Mosquito Boat Hobbies to convert the early war PT 109 to a late war PT 596. I will be using triple motors by Mack Products. I will also be using their drive train parts. Because of weight considerations I will be taking steps to make the boat as light as possible. The addition of a number of resign parts for the late war conversion make this necessary. I will try to keep track of the weight savings as I build the kit. OK, lets get started.
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Apr 29, 2012, 11:09 AM
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marter1229's Avatar

I'll be watching. Hope I learn some good building techniques, cause mine have been slipping.
Apr 29, 2012, 12:34 PM
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Browndog's Avatar
I think you will really enjoy the build. I have an order in for the Higgens boat.
Apr 29, 2012, 12:36 PM
Grumpa Tom
Kmot's Avatar
Wow, all that building is just for the deck? Which then attaches to the fiberglass hull?
Apr 29, 2012, 12:40 PM
Mmm, tugs...
patmat2350's Avatar
Warning: build it light. That kit is Heavy!
Apr 29, 2012, 05:42 PM
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Gravman's Avatar
Kmot, yes there is a lot of structure under the deck and as Pat says I want to build it lite. I have been covered in sawdust the past few days as I have cut lightening holes all over the frame. I will post those pictures in the next batch.
Apr 29, 2012, 09:36 PM
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CaptCB's Avatar


Frank, has a lightweight fiberglass deck. Did you consider using that? CaptCB
Apr 29, 2012, 10:10 PM
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Gravman's Avatar
I did not know that he offered one.
Apr 30, 2012, 12:56 AM
Taking care of the pond.
Got me hooked.
May 02, 2012, 07:40 AM
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Gravman's Avatar

Making it lighter

In an effort to reduce the weight of the hatch and deck assembly, I cut holes in the frame to reduce weight. Total weight savings was 175 grams.
May 02, 2012, 04:06 PM
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Gravman's Avatar

Hull Correction

The hull that Dumas produced has a couple of flaws that should be corrected. The most important one being the "bow correction". The forward section curves downward, if you look at the plans that are provided you will notice that the bow does not curve downward. In the video provided by FMH this correction procedure is covered.
May 04, 2012, 11:07 AM
"Damn The Torpedoes...."
PT-333's Avatar
Gravman, good to see your making progress. I made my weight less by doing the same thing and the bow correction looks great.
May 04, 2012, 06:40 PM
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Gravman's Avatar
Looks very well done PT-333

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