I found this hull at thingiverse last year. I printed the hull from a local shop and rest was handmade.
Firstly I bought a 2426 4200kv brushless 2-3s which was too powerful and too heavy for the boat size. The length is 38cm.
And the 30Amp esc was also too big for it's size.
After that I tried small 180 brushed motor with 20A brushed esc w/brake. it was perfect (still it's heavy😂).
The bridge and deck is made by 1.75mm pvc,torpedos are made of wooden pencil.
Small battery space takes a 2s 500mah lipo. 30mm 3blade propeller.

YouTube video link is here:

This is a restoration of a launch I was given that was found in a rubbish bin on a farm here in Auckland it is an old RCM ? plan built 'Fairacre' and was pretty rotten when I received it as it is made in balsa and had been wet for quite a while. I stripped it down, re 'planked' large portions of the hull and fiber glassed it, re- built the cabin, re- marked the deck planks, fitted lights, curtains (ex Graupner Commodore bits from the 70s I had kept), stern ladder, cleats etc. it is fitted with a 540 brushed motor (originally had an old Graupner monoperm) and 70s Graupner ESC and Using 2.4 Radio gear. I still have a few things I'd like to do such as a re-wire, fitting chine spray rails, better motor and maybe some safety rails, but for now it does the job.

My second scratch build. SA Navy "Spioenkop". 1:80 scale. 2 Mtroniks 600 motors on the scale 40mm (home made) props running on 6v and Hobbywing 860 brushed ESC. Jetdrive (also homemade) runs on a 550 motor (I think!) and a 1060 Hobbywing ESC running on 12v. Chopper is a heavily modified Hobbyboss RN Super Lynx. Hangar door opens as well as chopper moves on helideck with worm drive and magnets. idea is that this would happen sequentially ... but haven't managed to sort that out as I am "electronically challenged". Suggestions welcome!

CB90 Model boat, 52 inches long performing 360 degree rotation on its own axis.

The Combat Boat 90 (CB90) is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet.

Powered by two 9.6v Graupner 700 turbo motors (no-longer in production).
Two Mtroniks Viper Marine 25 is a Brushed Speed Control designed specifically for use in RC model boats, it has a 25Amp motor limit and has proportional forwards and reverse functions

Brought this vintage Aero Kits RAF Crash Tender for £50 from Newcastle area, it is the 34in version.
To my surprise at home I found that it had a Bullet 30 motor installed these motors were the top drawer motor of early fast electrics in the early 1980's and its the only one I've ever seen, it can run on 24v and pull around 15A giving 300w not bad for a brushed motor.
due to the power of this motor I have modified the hull under the water line with turn fins and trim tabs to reduce torque roll and improve turning stability, the underside is incorrect already as it only has one propshaft, where the original had two and I believe that both props turned in the same direction.

The Pictures here show some of the work in progress I have remounted the motor and added a speed controller rated at 24v
I have remade the stern compartment and rudder gear under it.
I have blocked windows and foamed the front half of the boat.
made missing parts and repaired delaminating ply.

Note old ply is not as good as modern, the glue is not as water resistant.

Have painted the hull and have just ordered the decals from Cornwall model Boats :-https://www.cornwallmodelboats.co.uk/cgi-bin/sh000001.pl?WD=hose%20fire&PN=becc_fire_tender%2ehtml#aB_2dFTS1_2e32

The 34in is 1/16 scale

Fitting can be brought but many are cast white metal and can add weight to the boat, I have made two water cannons and plan to buy plastic fittings from this site.

This has turned out to be a task that is difficult to assess how much effort and money to spend on a hull that has been built by someone else (say no more).
Have just finished the steps for the stern compartment.
Painted and now for the test run.
the Bullet 30 motor ran well between 14 and 18v,

A challenging project 10 years ago. Scratch built model of theSRN3 built under licence by the US for use in the Mekong delta against the VC in Vietnam. Very light construction with liteply.
Two ESPs control brushed and brushless motors for lift and propulsion. Motor tube ball-raced at each end with a 9x6 pusher prop. Realistic performance and sounds like a turbo prop. Tricky to control in anything stronger than a light breeze. Best on water.

From the DPI (US) kit, tempted to upgrade to a brushless but goes like otznot with the fitted brushed motor though !

FOR SALE

Billings kits built 2016

2 brushed motor, 2.4 ghz radio and crew members from Realmodelpilots.com

Some pics of my favorite build. Made on a barebones fiberglass hull. Runs with a NIHM 10.8 battery, a 540 brushed motor and a 30A controller. Pictures taken by the Olympia Park pond in Munich, Germany.

Converted revell kit
Im using an A1 downunder dive dystem
Using a bag filling it with water
Rattle can base coats then different tones airbrushed over that then brush weathering

With my boats getting routinely stranded in the middle of nowhere, I felt compelled to commission a rescue vessel and "Triton" was born. "Triton" is a Springer-type tug push boat. With a hull and superstructure consisting of an “Indiana” style command cabin, it was built using a pretty basic birch plywood American kit designed for swimming pool water polo. Kit altered to resemble a fictitious Salvamento Marítimo (Spanish Coast Guard) unit following Salvamento Marítimo’s actual boat markings. Equipment and deck layout inspired on actual Springer tug push boats supporting larger vessels and barges found in US and European ports and rivers. Model built during September – October 2015. Approx. 1/18 scale. Real life boat could be a 30-footer (9.14m) vessel. Equipped with 9v LED navigation lights and sound system. Powered by an HPI Racing 1145 Gt 550 Motor, NiMH 7.4v battery, a 3-bladed 44mm propeller, and a 6-12V 320A RC Ship & Boat R/C Hobby Brushed Motor Speed Controller.

22.5 inches RC boat inspired on 1970s Chris-Craft Commander 36, 42 and 45 footer boats. Model equivalent to a real-life 36 footer vessel. Barebones fiberglass hull from a UK manufacturer. Powered with a brushed 500 motor, 30A controller, 9.6v NIHM battery. Video made during first trial at the Eibsee lake in Bavaria, Germany.