Interesting Stuff, Wisdom from an airplane mechanic |
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Interesting Stuff, Wisdom from an airplane mechanic |
bigkensteele |
Oct 12 2015, 06:17 PM
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#1
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Major Member Group: Members Posts: 2,197 Joined: 30-August 04 From: Cincinnati, OH Member No.: 2,660 Region Association: South East States |
A buddy of mine who has his own plane sent this link to me knowing I would find it interesting due to the great similarities between air-cooled aviation engines and the ones in our cars.
It is long, but very informative. Touches on burnt valves, cylinder/case cracks, etc. Teaser - the first 15 minutes or so explains why compression tests are close to worthless. https://www.youtube.com/watch?v=4NnOYvOlMB8 |
gereed75 |
Oct 14 2015, 06:05 AM
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#2
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Senior Member Group: Members Posts: 1,257 Joined: 19-March 13 From: Pittsburgh PA Member No.: 15,674 Region Association: North East States |
Being a pilot (fixed wing and helo) and an operator and builder of air cooled plane engines, I would say there are many parallels between these two motors. The biggest thing in aero engines is you have a manufacturer that tells you how to operate and there is a lot of CYA written into the equation. And remember, the pilot has a mixture control in the cockpit. Add that to a generally poor understanding (and sometimes fear) on the case of most pilots, and the potential for much engine abuse exists. Then throw in a government regulatory body and you can imagine the BS that ensues.
Savvy pilots use EGT as the means of correctly setting mixture (actually AFR) for various operating regimes. The physics/thermodynamics that occur from there are identical in either engine BTW, in an autorotation the glide may suck, but you do have the ability to land with zero airspeed and zero sink rate. That has some distinct advantages to gliding in at flying speed in a fixed wing |
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