Quote:
Originally Posted by MadTommy
I just tried this and was getting some really odd things happening.
Climbing at 7lb boost, 2,850rpm, IAS ~155, rad half open.
Temp gauges all within limits when at 17,000ft my rpm started fluctuating wildly, causing cockpit shake. I was unable to control my rpm. 
oil = 85, water = 100.
Changing fuel mixture did not help.
I don't know what was going on.
Only way i could stop the shaking was sub 2,100 rpm & sub 4 lb boost.. managed to get to 19,000ft but could not maintain a climb.. |
+1
Very similar initial results for 2a at 9 lbs/2850 rpms/50% rad -- opened to 100% as oil reached 97/glycol 120, speed 185 mph IAS. Reached 19,600 with fluctuating rpms & boost -- could not climb above 20K: aborted climb. Engine undamaged - flew normally at lower alt.
Sea level run: 270 IAS 9 lbs/3000/35% rad
280 IAS 11 lbs/3000/35% rad
Doing a quick test of 1a 100 pctane