You spin me right round baby right round

knot4u said:
Maybe, I remember working on radial engines with magnesium accessory gearboxes, as I recall they were all painted the same color as the power section and the power section cases were steel. I don't know, it was some gray color.
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Easy ID of dissimilar metals or particular coating to protect from corrosion? Also, aren’t ceramichromed cylinders painted orange so you don’t mix/match? Or is it over-sized?
 
deadstick said:
Easy ID of dissimilar metals or particular coating to protect from corrosion? Also, aren’t ceramichromed cylinders painted orange so you don’t mix/match? Or is it over-sized?
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Not sure, I never worked on small piston engines, but your post jogged a memory from A/P school. My piston engine mechanical experience is extremely limited, mostly working on an air racer.
 
That UN photo is an odd one. Every other picture I've seen of a VR-14 (BP-14) transmission on a Mi-8/17 has been painted gray. This is also the only example I can find where all the panel interiors are painted UN baby blue where one would normally expect zinc chromate -- and even much of the mechanical components on the rotor control are that color.

I started looking for other picture of this specific airframe, but they are rare. That appears to be additional armor beneath the flight deck windows that is not present on other Mi-8s.

Edit: This is apparently a newer Mi-8MTV. The armor around the cockpit is mounted on a kind of french cleat and is removable. The heat exchanger thing above the last windows is where hoddog-shaped auxiliary fuel tanks are mounted.

I absolutely love how they pack these things up to roll into an An-124 for transport; stuff the tail boom and rotor blades into the cabin.
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Minuteman said:
That UN photo is an odd one. Every other picture I've seen of a VR-14 (BP-14) transmission on a Mi-8/17 has been painted gray. This is also the only example I can find where all the panel interiors are painted UN baby blue where one would normally expect zinc chromate -- and even much of the mechanical components on the rotor control are that color.
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I thought that shade of blue was standard Russian. If you google “Antonov cockpit,” you’ll see what I mean.
 
deadstick said:
I thought that shade of blue was standard Russian. If you google “Antonov cockpit,” you’ll see what I mean.
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yes that blue is the same blue used in cockpits. Here is an Mi-17 cockpit for comparison

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And it is the standard color for the engine bay interior as well. At least on newer built/refurbished ones. Here’s another example. Older ones seem to have a zinc chromate primer.

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I can't find anything official, but it sounds like (and looks like upon rewatching) that the nosewheel went hard left and the resulting yaw was not stopped.

The story posted on aviation-safety.net is:

“In base of the investigations and simulations made by Leonardo the accident occurred because the pilot didnt unlock the forward wheel and tried to began taxi, then he understood that the front wheel was blocked and he unlocked It, that caused the helicopter to veer to the left because of the thrust applied by the pilot and crash on the taxiway.”

Or this on helihub.com:

“The explanation is approximately as follows:- Nose wheel is locked (should have unlocked in pre-taxi check list). Pilot then tries to taxi and turn left but the aircraft doesn’t respond as expected. After a pause, the nose wheel is unlocked, but without first re-centering the pedals. As soon as the nose wheel unlocks, the aircraft turns violently as commanded by the pedal position – the trim motors hold the pedal input at the last set position.”

Video from OP is removed; here's a reupload:

 
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