Using a 3.7g micro-servo. it is possible to install this small unit within many of the existing model Radar parts or scratch built models to create a working model Radar setup.

Here is an example of one fitted to my RNLI Trent lifeboat. I am using the bottom of the servo housing to clamp this unit to the underside of the base of the kits Radar platform, this helped to reduce the overall height and to maintain the scale size.

These servos are available on eBay at £1.89 including postage from China or Hong Kong.

I found this easy to mount and I have kept the servo electronics, connecting this servo to a spare channel on the receiver. This enables the radar to rotated in both directs at adjustable speeds or just stopped. I usually have it adjust at slow : scale speed, setting this with the trim on the transmitter.

Photograph of working Radar installed into Trent RNLI model.

Purchased secondhand, upgraded to a proper motor esc rather than the original/factory on/off micro switch for the motor power. Running a graupner 600 race motor and 7.4 lipo, basically just to run the brushes in on the motor before raising the battery voltage,
bit of a shaky video but try holding the transmitter and filming at same time on your own [ha ha].
it does have the capacity to move a ot faster, but would sooner work the motor in fully first

SemI Scratch build from a my hobby store plan and hull [only] kit. After 18 months its still an ongoing build 🔨 , as my research in to the original vessel continues so I can get it as correct as possible. 😯
I have managed to get all the correct light patterns on and working, as well as twin radar and now finally have got the crane to operate remotely from the radio transmitter. 👍

Hi" I thought I would put my new rebuild on for all to see ! I found this old Marblehead yacht as a wreck. She was gathering dust in an old reclaim ferniture wherehouse whilst we were on holiday last summer. Been told the yacht had been originaly scratch built in 1950s from a plan. She took me about half a year to rebuild. New parts as follow hiteck sail arm winch with 18lbs of torque. New futaba servo for the rudder. New sails & booms rigs & fittings. New deck made from plank strip wood & varnished. Also finished in painted Ivery white. She sail well in lite to strong winds At my local boating lake at Sheringham Norfolk .
works well on a Spekrum DX5E But can work on any other 2 channal transmitter .
Hope you enjoy the photos .

Just completed , not exactly origonal but not too far out. On the pond for the first time today after a rebuld, and very happy with it I am. Graupner kit, Don't know the builder, but when bought it was yellow! it just had to be put back to red. I didn't like the green deck, so it became mid-grey (gloss rubbed down to semi-mat). Powered by 3 Graupner 500 motors. Working radar and lights (worked from a key-fob, not transmitter). Sailed at inverleith Pond, Edinburgh. Home of Edinburgh Model Boat Club.

"BOO BOO Kitty" is a scale model of a Crosby designed Cape Cod Cat Boat.[USA] it was built from scratch at a scale of 9.04" = 1"; the model being 26.5" oal.

The dimensions were taken from a book that highly detailed the building of a real Cat Boat.

The hull is plank-on-frame with epoxy and glass cloth as the final surface. A separate and detachable fin keel was used for sailing of the centerboard model.

Radio controls were a Hitec sail winch [HS-785HB] and one servo for the rudder with a 2 channel JR transmitter.

Copying the book plans, scaling them down, and construction took up the winter of 2006/2007. The model is sailing better than anticipated on a local lake in Langhorne, Pennsylvania.

This is a model of a sidewall hovercraft fire and rescue boat (Hovermarine HM218) built by James Ramsey.

This started its life as a broken hand vacuum cleaner. Opened up there are two squirrel cage fans. He obtained pictures, sale data, amd small GA drawings from a Hovercraft Museum and was able to scratch build.

It has twin motors operated through mixer and two ESCs, steerable fire monitors plus nav lights, deck lights, flasher, fire pump, siren, rear mast lights and serch lights operated from the transmitter via a Digiserv unit.