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With an efficient prop, this can be brought to full scale speed with a total of 28 watts. However, that presupposes that the model was built to scale weight of 55-60 oz. With brushed motors, that means about 35 watts to one motor is all that’s needed for Full scale speed of 7.8-8.0 mph. Multiple motors make it less efficient and runs down the battery faster and makes it less likely that you will get anywhere close to scale weight. The CG is 60-62% measured from the bow. With 1.86:1 gearing a Grauner Speed 400 6 V run at 8.4 V with a single Octura X427 prop is perfect at scale weight. The LiPo may make it harder to get the CG far enough back, compared to the NiMH, but my experience with NiMH was poor, they went bad too quickly. Good luck with your boat.

Great job!!!!..... I've been wanting to make my own for a bit. I could see it in my head, and was kinda stuck on how to make the hook, even though now thinking about it, I do have real bungee cords in my shop I never thought to look at for ideas...lol... Thanks for sparking my interest to make them.....Crawler On Dude!!!!!

That's one sweet Fuckin Boat. Looking forward to seeing how she performs during her Sea Trials 🛥️

Nice thanks for your help ✅👍🇲🇾🇲🇾🇲🇾sharing, done subscribe 😊😊😊

Did the same, but polished the windows with brass polish.

Awesome tips dude, just what I am looking for when now going to equip my crawler :)

Nice Dumas PT boat. It's been 3yrs. I was wondering if you made any progress with the PT.

Brilliant, many thanks, great tutorial

Great job mate! You could always paint the windows with Tamiya smoke tint... It looks really natural. But great job! cheers from Australia. Subbed.

Very cool

1. Side cutters 2. Needle nose Vice grip 3. Needle nose pliers with built-in side cutter

I have this boat, had it for 27 years. Mine has a homelite 25cc with electric start. I am thinking about getting it back out this summer.

you're going to do all that to save 40 bucks

You could also try a crimp style with that paper clip after you make the coil

the truck has its nipples pierced

Seems like that would put more stress on the shock tower. Just do the fuel tubing in the shock less work, cost less

Good job I like the color. What grit sand paper did you use?

Did you run it in salt water? Sorry if I missed that.

I know this video is a year old, but got any updates on the inside and how it turned out?

Freaking awesome how to videos man great content stuff that actually helps us Rc guys out!!! Big sub here!!!

Great stuff man!

Hi, what's the body ? I search the same... thank you !

watched over this video again as I am impressed with the model it's self. as a suggestion you should give her a new paint job keel to upper decks. [ remember two coats of primer.] remove the PT lettering from any gun mount base and superstructure bulkheads. as PT was never painted on them Don't know why they added them to the decals. only place you would had seen PT-109 would be on the life rings which were Never orange in War Time. they would be the same color as the boat. Other wise the model looks good. There should also be a depth charge in a simple rack port and starboard a few inches ahead of the forward cabin in this scale. Also the bottom of the hall and on the sides of the hull back towards the stern the bottom is painted anti-fouling red with a black boot top and the whole boat should not be one solid color. Hoping you post a video of her when you get her fixed up. a really nice looking model.

Actually you don't want that PT-109 decal for the bow. out side of tv's PT-73. real PT boats did Not have that painted on them. there was only four places on the boats the number was painted. across the top of the forward cabin just above the windows. one on the starboard side on the side of the lower gun tub, on the port side cockpit side between the antenna stand and the curved bulkhead . and the last on the back of the stand of the 20 mm mount on the stern. Those huge PT-109 on the bow would had stood out like sore thumbs for any gunner to lock onto if they had actually placed them on. the bend as you call it. on the after railing behind the 20 mm is actually how it looked.

The DUMAS Pitmann motors are bulletproof. No cooling required. If you install brushless you will need to add the complication of watercooling otherwise the magnets inside the brushless motors will be destroyer. Don't rush to "update" stuff like motors, ESC, radio system...keep things out of landfill. Also I wud avoid LiPOs becuz of the explosion/fire hazard and the need for a hi tech charger...plus time spent in maintaining your batteries. I wud use a gelcell or NiMH as they are uncomplicated & you need the ballast weight anyway. Nice to see a large PT109 with 3 props. My latest DUMAS PT109 has only one prop, a 1" plastic...circa 2021

Looks like that 2nd servo drove a mechanical speed control, essentially a switch that selected resistors or perhaps a half-pack for voltage steps. That astroflight ESC is relatively new, maybe 2002?

Tried it, not that great. Will dull the clear plastic.

Those pitman motors are great. Same with the speed control. I would go with max volts, and water cool the speed controller. Also reverse the motor on the right and acquire a right turning prop.

I give it 4.5 stars thank you on info

What a great idea. Thank you

I know I'm late but toothpaste works

Thanks Man

You gotta hit that window wit a heat guy just take it slow

I have a couple old tug boats I built in the way back. They had a mechanical speed control that used a regular servo to move it back and forth. They were very reliable and despite Radio gear getting more sophisticated I never changed them out. I am now putting together a 30 inch PT Boat. "Plastic" from a old kit I never did finish. I am using a proboat electronic Speed control with it. The Pt boat kit was missing some detail though and I have scratch built a lot of the missing detail. That's how I found your Video. Searching for boats that had more detail to them.

Try heat for the windows like a heat gun or something without melting it

Nice model, I would update the radio to 2.4 and you could see how the stock Dumas motors run. See if they are 6v or 12v? Brushless will go faster if you want more speed. Show us the boat running when its ready to go. I have one ready to build and have not decided on motors or speed control(s) yet. Anyone have any suggestions for a scale running speed at 48" triple screw?

PSA: 9:24 ,For start of actual making them if u have your materials already

Thanks for the video I’m planning on using traxxas SCT paddle tires and bandit tires for sand. I need the bandit tires because they will act as directional tires so I have more control

Nice, i have to try that

Great idea

Cool

How would I know if a shock is compatible? Is it just length or there are other factors? Can I put some lube?

Excellent video

Maybe servo is to control torpedo tubes?

Is there anyway you can remove the styrofoam from the inside ? Someone ran into me at the lake and my hull is damaged and I would rather fix it from the inside so it doesn’t show

Yeah same way I feel. Fall is coming yeah....😒 lol.

Are they survived

Carb cleaner works with getting paint off

This truck is 1/18 scale

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