Built for the MMI Solar Boat Challenge a number of years ago and includes the winner (Amber Sol-air !) that had to complete as many circuits as possible of a canal system constructed out of household guttering in a fixed time. (the gutter naturally limited the size - loa, beam and draft). All built out of depron from my own head - with enough left over to build several more ?!

There are a number of ideas for propulsion - all powered by solar panels, no batteries. The pool is 12 feet diameter and great for boats of this size.

HI Some new photos of my Hunstman sailing at Cwmbran this Sunday morning, running on a 11.1 volt Lipo with "a wait for it" 55X 2 blade prop through a 3:1 reduction gearbox on a Johnson 600.
Graham

this is the Maggie B she is a modified Sothampton R T R tug. there is a video of her in the video section. the main casing was taken off and the lower three quarters of it was cut off, so that it reduced the overall height., she is fitted with two M tronic speed controllers and a new larger5,000millI amp battery which is fitted across the hull behind the motors and in front of the steering servo, she still has the original props but they are now turnig outwards to go ahead. she is now a very handy and stable boat.

Lady Wooes, by Mobile Marine of Lincoln. SemI kit. I bought the hull all the timber and drawings along with dozens of white metal fittings ages ago, started it and left it for 5 years, moved to North wales and finished it. Drive is 2 Ford Cortina fan heater motors driving a pair of 55mm Prop Shop props by tank steering, reciprocating steam engine sound board, smoke unit and full working lights all from 2 X 12 v 7 Amp batteries........a good and interesting but very frustrating build to get things right.
Sailed at Erias Park, Colwyn Bay Model Boat Club and sometimes at West Shore LLandudno.

Fibre glass Arrawana 22 inches less than a kilo,brushless 3600 kv 60 amp esc runs on 11.1v 3cell . Pretty fast but still exp with props

HI All, I had a request for infomation on the Motor and Gearbox setup that I have fitted into a Wavemaster, a Sea Commander, and Fireboat, all shown in various posts of mine. The gear boxes are fitted with a 2.92:1 reduction gear, and were purchased from Hong Kong on Ebay, this is the information if I can publish it in this post. I mount the gearbox this way up to position the motor in the boats as low as possible.

RC Model Big Size Metal Gear Box
http://www.ebay.co.uk/itm/RC-Model-Big-Size-Metal-Gear-Box-with-3-Metal-Motor-Gear-for-R-C-Airplane-GB090-/270842196092?pt=US_Character_Radio_Control_Toys&hash=item3f0f73f07c

Ebay Number

270842196092

Specifications
Material: Steel Brass and Aluminium
Main Gear: 38 Teeth Aluminium
Motor Gear: 13 Teeth Brass
Gear Rate 2.92:1
Prop Shaft Diameter: 4mm
Prop Shaft Length: 13mm

Hope this helps those who have asked Graham

This model was scratch built from US Coast Guard plans. The boat is constructed of balsa wood and the hull coated with fiberglass resin. All the deck gear is scratchbuilt from brass, the propellers, led's and figures are the only commercial parts. Scaled at 3/4=1 foot the model measures 42 inches in length.
It's powered by a Pittman 12 volt motor and controlled by a 4 channel radio. Working features are running and spot light, siren with flashing blue light, sweeping radar antenna and deck lights. Built in 1985 the model the lifeboat is accurate in appearence for that time period.(The prototype has been modified since).
The actual lifeboat is attached the the Coast Guard's Motor Lifeboat School at Cape Disappointment and is one of four boats of this class.

this is a slightly modified RTR tug Southampton the main casing has been lowered and a bigger battery fitted, but she still has the original motors and props, she is seen her towing a large barge a flat top pontoon ,a small tug and a Graupner German patrol boat, with a model slipways Envoy doing its best to overturn the lot.

Two Reclaimed Ebay boats, both running same setup Johnson 600 with 2.5:1 reduction Gear Boxes 45mm Brass props and 7.2Volt NiMh power.

HI This is a Celia, I think, it was a caldercraft kit but am not sure. it is running on a 545 motor at either 6volt or 7.2volt with a 35mm 3blade brass prop. its performance is about right for the scale and type of boat. it sails at the Lake used by the Cwmbran Club. I bought it last year at the Shepton Mallet Show.

I built this one about 3 years ago she is built at 1/24th scale 50"long and is a plank on frame hull , scratch built using lime wood planking and 9mm ply for the frames and keel, the rest is birch ply of various thicknesses.
she has a 12volt cooling fan motor driving a 4" prop,and has a 12volt 48amp hour battery ,plus some lead for ballast,with working lights and revolving radar scanner

I have just completed this model - just waiting for the new prop to arrive along with a flag for the main mast, plus handrail staunchions. it was a Precedent all wood kit and not too Impressed with the materials but you only get what you pay for. I have fitted a Graupner 700 Speed Turbo and a Torpedo 50 Amp ESC. I am powering it with 2 6 volt SLA's wired in series. Overall I think it has turned out not too bad and it seemed to get better the more I worked on it (or is that psychlogical)Tested in the Marine testing laboratory (white bath) and floats OK with no sign of a leak (fingers crossed). Our boating pond will be frozen over at the moment so no real testing can take place yet.