Set the new Surpass 3000KV 36 diam finned in-runner up in the boat, and did a tank test. Lots more power than the HV brushed 1200kv 550, but with higher idle. Re-did the reinforced silicone coupling and fitted a small collar to the inner end of the motor shaft to hold the tube from moving forward against the motor, as with the extra torque of the in-runner, it was trying to twist the tube off the shafts. Seems to be hanging in there static which is a promising sign. Once running, the load will come off which should help.

Runs full at around 4A and the battery holds at around 3.8v/ cell )alarm is set at 3.6 for safety, (as a sort of rev limiter) performance should improve a bit now. Have to wait till tomorrow as the restrictions end at 6am Sunday, (then have to hope for good weather for the test) The prop in the jet is a 28mm 3 blade racing prop which I modified to fit. Don't think I'm going to get much more out of the jet unit without it exploding😁, (it's only plastic I think, not GRP), - might have to buy a back-up and fit it with better quality bearings etc. If the jet was in the usual 'plastic' 24" toys it would be a rocket, but it's pushing 6lbs which is a challenge😀

Note the police chase outside in the background😁- always action around here, lots of hoons in cars😁

Zoom 1 (Interceptor) Mono boat.
Built from a Glassfibre hull, brought on Ebay for £35 the hull is a slim mono racing type with a self-righting side cabin it runs a 1400W 14V 2958 4200KV Brushless Motor and 29-S Water Cooling Jacket with additional air cooling fan.
I did not want to use a flexi drive as high maintenance and prone to failure so the shaft runs via two universal joint one at each end. the propeller is a 38mm copper alloy
The ESC is a 200W and water cooled the twin rudders supply separate water one for the motor and one for the ESC.
The rudder are positioned to reduce prop-walk and are hinged to prevent damage if you hit a object in the water and also for ride adjustment.

Turn fins and trim tabs for ride adjustment were provided by a spares kit for another boat. also foamed and added an inner sealed hatch, a rubber bump strip and safety loop.

Altered Krick Lisa M model kit seeking realism. inspired on 1970s 40, 42 and 43 Hatteras, Uniflite and Viking Double Cabin American yachts. 9v LED navigation lights system. Approx. 1/20 scale. Real life boat could be nearly 39 x 13.7 feet. Similar real-life Hatteras 40 Double Cabin yacht measured 41 x 13.7 feet. Runs with NiMH 9.4v battery, an HPI Racing 1145 Gt 550 Motor 14.4V, and a 40mm 3 blade propeller.😁

HI Fellow Enthusiasts
Photo shows my RAF crash tender in the colours as it was when first built in 1956/57 from a kit. (Red tops like all fire engines, well I was only 9 at the time.) This photo was taken at lakeside in 1993 when I first joined the Cwmbran Modelling Society. The Second photo shows the boat on display at the Portis Head Open Day event in 2000 several modifications taking place to the overall look of the boat. in 2008/9 I decided for it's belated 50th. birthday to revamp the model and bring it closer to the real thing. Damage to the woodwork being repaired and a colour scheme close to that of the real boat being applied. Several new deck fittings being made along with new window surrounds made out of plastic replacing the cardboard ones fitted in 2000. New decals and correct flag also fitted. The model was entered in the 2010 society Chairmans Comp. winning joint first place with one of my other models. Photo 4 shows my model as she is to-day repaired once again ready to sail, after hitting some Ice over the christmas period 2010 resulting in a hole in the bow that almost caused her to sink.
The model over the 54 years it's been around has been fitted with single and twin electric drives and to day it has a single johnson 550 brushed electric drive via a 2.5/1 gear box run off two 7.2 volt racing packs in series. The torque generated being too great for standard plastic props resulting in me using 40mm three blade brass props. The motor controller is an electolize 15 amp unit and I also use one of their switch units to activate the water pump for the scratch built water cannons. The water pump being salvaged from a 1960's car washer system and still goes to-day.
Hope you enjoy the pic,s as much as Ive enjoyed this model over the last 50 years plus.
Regards
GreyWolf

Aerokit Fireboat 34"
Boat was given to me in poor condition approx 30 years ago, no running gear and most fittings missing or broken, originally powered with IC motor.
I have installed a 43A 700KV Outrunner Brushless motor, Model No : XYH42-50 and a Hobbywing Seaking 60W / Reverse Program Brushless ESC bought from Giantcod, powered by a 3 cell 2200 mAh Lipo battery runtime 15 to 18min, the prop is a 42.5mm 2 blade racing prop. I am well pleased with the performance of the boat.
I belong and sail at the Hartsholme Electric Model Boat Club, Lincoln.

I have rebuilt this from a damaged ex IC model. Borrowed a plan from a club member and managed to reconstruct the missing bits. Originally used a fast electric car type brush motor with 7.2 v nicads. Worked ok but nothing spectacular. Recently ventured into brushless and LiPo. Tried an inrunner but ran far to hot and not veryt fast. Changed to an Outrunner (mork torky apparently) and nearly took off! (it is a seaplane tender but should stay on the water!) The LiPo is 11.1v 2800MaH. I use a Graupner Ultramat 16 charger, don't use other than a dedicated LiPo charger and ESC. Battery misuse can result in pyrotechnics, so beware. initialyy tried a two blade racing prop but have changed this to a 29mm 3 blade brass prop to slow down the speed. I have also added more lead and will advise the final weight once I have tried the model on water. I sail with Crewe and District MBC at Boundary Park, Nr Knutsford in Cheshire.