Hey everyone, long time rc enthusiast taking the plunge into boats!

Ian Landthaler · Feb 2, 2023

I recently acquired a vintage flat bottom hull and decided id take on the project! I’m approximately 90% finished with the build, and have enjoyed every aspect of it this far. It’s been a learning curve and I’m sure there will be some kinks to work out but I’m going for it ! I will say, it floats

. Here’s a picture of the hull when I acquired it, does anyone have any knowledge of these boats? I wanna say it’s a 1970 Lancer, by Excalibur. That’s just based on what I’ve found online.

Davidkrienke · Feb 2, 2023

Those are super cute. that will be a fun boat to play on the pond for sure. you making them electric or nitro?

Ian Landthaler · Feb 2, 2023

Davidkrienke said:
Those are super cute. that will be a fun boat to play on the pond for sure. you making them electric or nitro?

I may get some flack for This one, but I’m setting it up with a 26cc gas motor. Taking a little different approach on this build I guess you could say. Btw, it’s 36” in length .

Davidkrienke · Feb 2, 2023

Ian Landthaler said:
I may get some flack for This one, but I’m setting it up with a 26cc gas motor. Taking a little different approach on this build I guess you could say. Btw, it’s 36” in length .

It will be a screamer with a 26cc being only 36 inches. I have a 26cc in a 42 inch long seaducer and it is going 52mph and is all it can handle .

Ian Landthaler · Feb 2, 2023

Davidkrienke said:
It will be a screamer with a 26cc being only 36 inches. I have a 26cc in a 42 inch long seaducer and it is going 52mph and is all it can handle .

Oh man, that’s fast! I knew this would prob be too much motor but I just couldn’t handle how small that nitro motor would look In it. The pull start, clutch, and decent idling was appealing to me with the gas motor. I’ll drum up a few pictures so you have an idea of what I’m working with.

Davidkrienke · Feb 2, 2023

Ian Landthaler said:
Oh man, that’s fast! I knew this would prob be too much motor but I just couldn’t handle how small that nitro motor would look In it. The pull start, clutch, and decent idling was appealing to me with the gas motor. I’ll drum up a few pictures so you have an idea of what I’m working with.

I am just worried it will be too much weight for it. I would almost think a 45 nitro engine would make that thing scoot and not weigh so much. the clutch will add even more weight and also will make installing drive shaft more of a challenge by setting the tube farther back and having to make the engine higher in the hull and effect the balance of the boat . .

Davidkrienke · Feb 2, 2023

Also the gas engine will have to use really wide rails to fit. I think even the .45 I have has 5 inch wide rails. the .21 boats have 4 inch wide rails.

Ian Landthaler · Feb 2, 2023

I appreciate all your input @Davidkrienke ! This is a first time build so it’s semi experimental. I probably should have joined the forum when I started because I’ve had a lot of questions along the way haha. I can tell you the boat weights 12.5lbs finished and floats well in the tub. That doesn’t mean it’s going to work, but I have hope! Balance center is 35% from the rear (if that matters). And yes, the motor is up semi high but I tucked it as low as I could. The inside was semi delaminating from I’ve the years so I knocked out the stringers and started with a clean slate.. as you’ll see in these pictures.

Davidkrienke · Feb 2, 2023

I like it. I would see what it does . You have it done looks like. just shaft install and radio and your running. Check out Zippkits.com for a medium fuel bag and a 7016 prop and you can get all the water outlets and other items as well. Nice work .

Ian Landthaler · Feb 2, 2023

Thanks David, I appreciate it. Been a really fun project. You’re on it, that’s the exact prop I picked up from voodoo. Just have some time consuming odds and ends to wrap up like the servo box lid, servo box mounts, steering and throttle linkage and stuff like that. Hoping to have it done within the month!

Grimracer · Feb 3, 2023

make sure you stuff A BUNCH of flotation under the deck.. be a shame to loose that one.

Grim

Ian Landthaler · Feb 3, 2023

Grimracer said:
make sure you stuff A BUNCH of flotation under the deck.. be a shame to loose that one.

Grim

I’ll probably have a string tied to it for the maiden voyage

. but yes, I plan on packing all the foam in there I can! Pretty sure if shed a tear if I lost this one.

bzubee · Feb 4, 2023

Do not use the spray in expandable foam.

Ian Landthaler · Feb 4, 2023

bzubee said:
Do not use the spray in expandable foam.

Ya haha, wouldn’t want a bubble deck ! Thinking pool noodles packed in there, unless there’s a better solution .

Wasted wages · Feb 9, 2023

The radio box and engine rails are off the chain !! Do you machine those yourself ?

I think the hull would have performed much better with a smaller nitro motor as previously mentioned, .45 would have been great... .67 would have been ballistic. .90 would have been insanely fast and barely controllable....

Gas motor places a lot of mass high up in the hull, and with a lot of torque available, the boat may be prone to rolling in the turns, and with speed in the straights, prone to blowovers...
Gas motors don't like to ingest water and can possibly twist the crank, if you don't get the throttle shut quickly when it blows over.

After a dunking, pull the plug, and turn the motor over slowly by hand,, any resistance or binding of the crank is bad news...don't try to start the motor until you tear it down.

If it rolls over ok, hold the boat up, pipe facing down and cycle the pull starter a few times to help drain the crankcase and pipe before trying to start it again...

Ian Landthaler · Feb 9, 2023

Wasted wages said:
The radio box and engine rails are off the chain !! Do you machine those yourself ?

I think the hull would have performed much better with a smaller nitro motor as previously mentioned, .45 would have been great... .67 would have been ballistic. .90 would have been insanely fast and barely controllable....

Gas motor places a lot of mass high up in the hull, and with a lot of torque available, the boat may be prone to rolling in the turns, and with speed in the straights, prone to blowovers...
Gas motors don't like to ingest water and can possibly twist the crank, if you don't get the throttle shut quickly when it blows over.

After a dunking, pull the plug, and turn the motor over slowly by hand,, any resistance or binding of the crank is bad news...don't try to start the motor until you tear it down.

If it rolls over ok, hold the boat up, pipe facing down and cycle the pull starter a few times to help drain the crankcase and pipe before trying to start it again...

Thanks @Wasted wages ! Yes, I went overboard and drew up and machined the stringers, servo box and etc myself. if I didn’t have access to solid works and cnc machines this build wouldn’t be half of what it is haha. I completely get where you’re coming from in regards to the engine setup in this hull! I’m no stranger to pumping water out of an engine as I come from a surf background on stand up jet skis. I appreciate the input! Definitely curious to see what and how this boat acts on the water. If anything it’ll look good on the wall

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