QDMx3 4 minutes, how bizarre. It is a 150hp Super Cub with a Lycoming O-320 engine right? Surely you haven't had the O-540 conversion with 310 hp! If you have, can I have a ride please?
If it is the O-320 then it's one of the most reliable engines in the business as fitted to AA-5s, C-172s and PA-28s the world over. I am amazed that they would be restricted to 4 minutes ground running. As I said earlier Southampton, (for one) when busy should have PA-28s and Grumman AA-5s with cooked engines all over the place.
Lowtimer nice insight into the operation of radial engines. I'd thought the cooling shutters on the MP-14 were to ward off Siberian cold in the winter. I didn't realise that the airflow would cool the heads that quickly on the ground. I remember the AeroStar display team at North Weald last year taking forever to warm up (after their well flash sychronised startup
), now I know why, cheers
