OS-MAX-10FSR-S

Digital Restoration

O.S. ENGINES OS-MAX-10FSR-S

Welcome to a tour through the results of the digital restoration of this 1.76 cc glow plug engine for RC model aircraft.

 

The non-throttleable version of the OS-MAX-10FSR for speed models. As far as I know, it was used mainly for speed tethered flight (hence the -S in the model name)


Single cylinder 2-stroke engine with glow plug ignition, Schnürle scavenging, rotary valve crankshaft, side exhaust, crankshaft bearing as pressed-in bronze bushing, Venturi carburetor.


One of the first digitally restored engines. The red cylinder cooling head never existed in reality, but the renderings simply look better this way.

Other engines

Displacement            1,76 ccm (0,107 cu.in)

Bore                            13,44 mm

Stroke                         12,40 mm

rpm range                  3.000...18.000 1/min

Performance              0,27 PS / 0,198 kW @ 17.000 1/min

Compression ratio    9.0:1 (full stroke)

Port timing                 Exhaust 146°, Transfer 124°, Third port 108°

Combustion type       2-stroke

Fuel                              Methanol, Oil, Nitromethane

CAD-models             10.08.2019 - 29.12.2021

Rendering                 27.02.2022 - 25.03.2022

Blueprint                   10.02.2023 - 19.02.2023

Step-model               _1473_os-max-10fsr-s.stp

Engine purchase      ~2019

Production date       approx. 1976




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