Part 1. ideal conditions; nearly 30°C, cool Bier at hand😜
Sea Scout built by Dad in the early sixties with a Taycol Target and 6V lead acid wet cells (very wet😡). Renovated and dragged into the 21st century over the last several months 😉
See Build Blog 'Sea Scout 'Jessica'' for details!
Motor: Propdrive 2830, 1000kV, 30mm 3 blade Raboesch prop. Quicrun 16BL30 (30A) ESC with BEC.
Tested with 3 battery types, all started with 99% measured capacity-
1. NiMh 4.2Ah 7.2V, nom. 408gm.
Result: Speed sedate (OK 😉scale river cruising!) No planing.
Max current: 3.6A
End status V / capacity left: At end of short run ca 3 mins. 7.78V 99%.
2. 2S LiPo 4.0Ah 7.4V nom. 257gm.
Result: Speed still sedate but due to lower batt weight at least the forefoot came out of the wet stuff! Max current: 4.1A
End status V / capacity left: At end of short run ca 3 mins. 8.25V 93%.
3. 3S LiPo 4.0Ah 11.1V nom. 315gm.
Result: Now we're getting somewhere!!😁
Good speed, manoeuvrability and planing 😊 Max current: 7.5A
End status: 11.95V 74% after several long runs, ca 20 mins total.
Estimated (extrapolated) endurance on a 4Ah LiPo around one hour - mostly 'full bore' - 'Pedal to the metal man' 😊

See also:

The competition!

Final run. (Beer was getting warm😁)

Cap'ns log entry:
Boat dead-weight w/o battery: 1.8kg.
Spray rails to be added!😲
Slight list to port to be trimmed.
Rudder servo to be reversed!!😲
Keel protection to be added: some scratches and flaking from stony sloping shore 🤔
Summary: much as expected👍 Forget anything less than 3S.
Anyone want to buy a batch (4) of new 2S 4Ah 45C Lipos? 'One careful owner'!
Happy boating people, Cheers Doug 😎
PS Many thanks to Camera girl Gisela 👍
Recorded in 1080p HD.

Some pics of a couple of Norfolk Broads sailing yacht classes I have constructed to precise detail externally, which were built on the Broads as holiday hire fleet craft in 1947 and to the present day.
One is 1:8 large scale and the other 1:18 scale. The larger scale yacht required a suitable detachable keel bulb for radio control use.

Sterling Emma C Berry 49”long 17 pounds with added keel weight.

Sterling Yacht America 51 1/2” long 8 1/2” beam 41” high. Model was built from kit has auxiliary electric power and Futaba sail wench servo. Model weighs 11 lbs and has a removable 2 lb. keel weight.

Model is 49” long and with ballast keel added weighs 17 lbs. hull is covered with 2 layers of 2 oz. cloth fiberglass cloth and painted with Krylon spray can paint. Hitec sail winch servo for main sail and standard servo for jib. Model has auxiliary 6 volt electric power to compincate for my sailing ability’s and wind conditions.
Sails are Mylar.

naw 😎this yachts has under gone a re fit from a new radio
sails and keel👍

Just about finished and soon to feel the water 'neath it's keel

Note the Futaba FG7 transmitter now converted to 2.4 ghz and has performed faultlessly since I acquired it in the 80s

Sorry about the mouthy woman on flog it and the noisy motor...greased it but still makes a lotta noise (the motor...not 'er)

A scratch built model of a working wherry the skipper/owner was the great grandfather of a near neighbour. Used to work the rivers Wensum and Yare here in Norfolk. Model hull clinker built. in balsa with resin inside and out. Sails really well with a detachable keel. One of four model wherries built.

Here is the last of the Lowestoft sailing trawlers. Model built using working drawings kindly supplied by the Sailing Trust. Model about 12 years old. I got a little carried away on detail! As expected she sails and handles well as all the old work sailors do.
Drop keel and rudder extension added when sailing. I was intrigued to discover that the deck winch was steam powered,no doubt to help with taking in the trawl net.

This is an 8 rater built by the dabblers club and been through a few owners at Chichester model boat group. These yachts are superb at ploughing over the odd bit of weed without it getting stuck on the keel. There are many of these in the group,

Sailing on the pond at the former Canterbury Golf Club, Port Perry, Ontario, Canada 🇨🇦

This is a Mini-12 Sailboat designed for sailing in weedy ponds. The rudder is attached to its shorter keel and weighs 12lbs+, and 42" length. it uses the Soling mast and sail area.

I am still learning how to handle this boat but it is sure fun!

While waiting for a second coat of epoxy to dry on my other model i enlarged some plans of an old Sea Hornet kit that I purchased a few days ago. I copied them 25% larger which gives length of 32 inches i then cut out the keel and bulkheads, i have only fitted them loosely for the picture.
Done a bit more to the hull and fitted the stringers and the bottom skins