Jason Channing

First air display watching from my mother in-laws house in Duxford and now i know why, even with free membership to the museum and displays many do not go to the Airshows as its much better being under the flight path rather than being at the airfield ,Lancaster flying over head and the Typhon pulling vertical straight above us,close enough to clearly see the shock diamonds and it was damn loud. Should be able to share some footage as my son took lots.

Saitos never had a problem, All you need to do is add an extra gasket to the barrel and reset the rocker clearances,

Good find

The first I'd check for is can you richen the engine fairly dramatically, If not then their may well be some blockage, take the see saw, spring and pin out carefully then carefully wind the mixture needle's in fully and then remove them then clean and flush the carb , this normally works to dislodge any dirt id any is present.

POST REMOVED AS TOO HONEST

I flew one of these years ago and it was a pleasure to fly, an updated kit could well be interesting.

It doesn't fly any faster at all, just has power when you need it to go vertical from a standing start.

My Junior 60 has a os 52 running on 30% nitro and flys much better than a 25 size engine.

I dont think you know your engines and pumps too well as thats how Perry pumps work. Even the YS pumps external or built in use crankcase pressure. In the past Ive used Perry pumps on a four stroke no issues .

Not a chance in hell would I put ML70 through my YS engines. Its also not an oil you will see really anywhere other than the UK. Klotz, Fuchs Aerosave, Castor are worldwide.

VP have awesome fuels and very high purity and is where I get my Nitromethane from when its required.

VP have awesome fuels and very high purity and is where I get my Nitromethane from when its required.

For those that want Optifuel I am a distributor based in Jersey but have some fuel in stock close to Duxford. (most of the popular ones) PM for prices (If your looking for a website there is none as one is not required on an island With only one flying club.)

I use some of the SMC fuels, However SMC do use a cheaper oil and cant really compare to more modern oils. Having asked Justin if he would use Klotz in the future it was something he looked into however that would have pushed his prices up somewhat. ML70 works but there are far better( and worse) oils out there.

OptiFuel do not use EDL( modified transformer oil that is no longer produced) in any of their fuels and as it was used in Bekra the fuel was discontinued, Any fuels that used SICAL have also been discontinued or have had it removed.