I posted this video in one of the FM threads some days ago, but as the topic has arisen again, I thought it might be useful to post it in the main forum.
The video is of three vertical dives, power off, propellor as near to 'feathered' as possible.
One run with rad open, one with rad closed, one with rad at 50%. The time taken to go from 130mph to 440mph was measured using the timer in windows movie-maker, and was measured from the frame first 'unpaused' to the frame where the ASI hit 440mph in hundredths of a second.
Rad closed took just over 21seconds
Rad at 50% took 20seconds
Rad at 100% took 23 seconds.
Not only is radiator drag modelled, but causes a full 3 second difference from min to max times taken, in an aircraft travelling up to 440mph.
This is not a radiator shutter, this is a parachute.
09-07-2012, 01:50 PM
'Radiator Drag Is Modelled' - Demo
Threaded Mode