A near new MDS 3.5cc (19/20 size) Model Diesel Engine complete with Muffler. RC with Throttle fitted. Be different fly a diesel engine instead of a glow. No Glow Plug required. Huge props can be turned. Far larger than Glow engines. Slow low revving large props are suitable to scale models where the diesels low note is more realistic than a two stroke glow. Its a super size for a throttled vintage style power plant.

This is a re list as we got the engine size incorrect.

Buy it Now or Make us an Offer

Excellent quality modern machinery manufactured model aircraft engine. 

See below for information regard MDS engines.

Peter Tarn is a model engineer of very good reputation and is known for his refurbishments of vintage engines as well as his own design/ specific Diesel Conversions of glow engines. This is one such engine. The seller is a massive fan of Peter Tarns Diesels but after purchasing this one realised, we already had an similar MDS made by Peter.

Peter’s conversions appear on eBay ‘now and then’ and are often bid quite high in price as the demand for them has been good. There was a feature in Aeromodeller and this feature certainly helped introduce the Diesel conversions to a wider audience.

This is a near new MDS  ABC R/C engine featuring Schnurle porting and a crankshaft supported in twin ball races.  It is a powerful sports engine manufactured in Russia for Robbe & Ripmax. It is complete with muffler and carburettor / throttle.

The engine has been converted to diesel operation by Peter Tarn.  The new cylinder head contains a cast iron sleeve with a precision-fitted steel contra-piston.  The carburettor has been modified internally to make it suitable for diesel operation.  All the diesel conversion parts have been manufactured by the Peter Tarn using Hardinger super-precision machinery. 

The muffler has been fitted with a blanking plug to replace the pressure nipple as muffler pressure is not recommended for diesel operation.

The engine has been bench tested using a 10" x 5" GRP propeller and D-1000 fuel.  It runs smoothly with good response to the compression setting.  The Idle is reliable and recovery to full throttle is rapid. Compression is more than adequate, much, much more than adequate.

Postage in the UK is £6.95 including insurance and is LESS that cost.

We can post this Worldwide preferably not by the GSP as because when they categorise the engine as a two stroke along with garden equipment and the like some countries block the import as ‘petrol’ two strokes are banned from New Zealand and Australia. Of course, this is a Toy Model Engine and categorised correctly it should arrive OK.

From 'our man on the inside'. The Rise and Fall and Fall of MDS and latterly RMX.

Before condemning this engine before reading this please note that this is a later modern manufacture MDS – It is not a first edition MDS, it is a later edition that was sold by Ripmax and Robbe & later became Ripmax’ s RMX engines. Ripmax decided to face lift the ‘name’ and reputation of MDS but alas the damage was done when the UK was first introduced to MDS.

The story goes that Ripmax used MDS engines in very hard moulded polystyrene boxes as ballast on a shipment from Russia. There were 1000’s of engines manufactured over a number of decades by a Russian work program where engines were produced and produced and stacked high just to keep a work force making product. These engines were rough but incredible value. Some stored sold MDS ‘golds’ 40’s and 61’s for £15 to £25 an engine. Sometimes less. We remember seeing MDS 25 engines for £9.99 each at a show. These engines were in a white polystyrene box. They had poorly assembled fits and carburettors were often missing o rings etc. Once of the best buys of that first round of MDS was a Rear 15 with Tuner Pipe. I can remember buying two for £30.00.

Ripmax then decided to Manufacture in Russia a range of high-quality economic engines to compete with the Chinese ASP, Magnum, SC etc.

The MDS Robbe/ Ripmax version was born. The name had already taken a battering as the initial flooding of the market by poor quality product had put folk off MDS. But here they were with proper instructions and very nicely manufactured all new product. If the engine had been tested thoroughly before coming to market we could be hailing MDS as the engine of the 90’s , but the carburettors had issues. It took Ripmax a good 18 months to solve the issues with carb rebuild kits. Finally, the engine ran well and worked as it should. BUT… for a second time the modellers in Europe had bought into an engine that didn’t work like it said it would. 100% better than the first lot, but Ripmax taking a good look at Enya carbs re designed the carbs and the Mk 2 MDS /Ripmax Robbe was out. But proving difficult to sell. Modellers had got the previous engines running by fitting Enya and OS carbs that often cost twice as much as the engine. The new Carbs worked, but not many would give them a chance. Slowly people saw the engines running well, but it was two late. The MDS name had been ruined. The jokes would always be there. The best door stop made etc.

The range MDS was re ‘thunk’ again, re boxed several times, given 2 year warranties and eventually the name change into RMX engines.  Short for 'RIPMAX'

The engine in this listing is manufactured to a very high standard. The carb works fine. Its typical of diesel engines. lots more popping and banging. But that’s the character of larger model diesel engines.