9 CYLINDER BENTLEY ROTARY ENGINE AVRO 504 K LMA RC MODEL AIRCRAFT SHOW RAF COSFORD 2013

ian redshaw flew the avro 504 in the video, the builder and owner andy johnston kindly gave me these details Engine details: scale 9 cylinder four stroke 33mm bore, cast iron liners of 1mm wall thickness and aluminium finned barrels 45mm stroke 347cc, compression ratio 5. 6:1 Super unleaded petrol with belts n braces 50:1 oil mix. (I use BelRay HR1 fully synthetic ester 2stroke racing oil. ) Total loss force fed oil system via engine driven oil pump, approx. 30cc per 10 min flig