Engine Instrument Question.

[Yo-Yo]

Any reasoning behind why Torque isn't used?

 

I guess it is because of failure to develop splitted shaft with non-contact data picking from the tenzo-sensor. May be it was a decision to make design more chip and robust, who knows...

[Yo-Yo]

For the moment in BS, there is no overstressing of the engine operating at take-off power.

 

There is outstressing but at very low level and it is not noticeable in one mission. I can imagine the situation when somebody flyes at full throttle for hours making pit-stops for refueling... and the performance of the engine will slightly degrade indeed.

[bradmick]

The easiest way to explain how torque is measured on my aircrafts engines, there's a tube that goes through the drive shaft and as a load is put on the engine, it twists. The twist is exactly equal to the amount of torque being put on the system and is read on the Np (power turbine) section of the engine. Not very heavy, or complicated.

 

Brad

[AlphaOneSix]

After having the chance to work on Russian, European, and American helicopters, the best way to explain it is just as a simple difference in design philosophy. I am relatively sure it has nothing to do with technology or weight or even simplicity. There are just so many other differences that can only be explained by differences in design philosophy.

 

Also, the TV3-117 series of engines powers 27% of all the world's helicopters. Fun trivia to drop at parties. ;)

[ThunderChief]

Yesterday I flew in mountain area and was flying @~4000m and playing around with the shkval and didn't monitor the engine gauges.

But suddendly I lost both engines how can that be?

I managed to get one engine startet right before I would have impacted the ground, so the engines were still working, must have been some kind of overload ... ?

[RvETito]

Not very likely. Do you have a track?

[Bucic]

Also, the TV3-117 series of engines powers 27% of all the world's helicopters. Fun trivia to drop at parties. ;)

:)

[arneh]

Also, the TV3-117 series of engines powers 27% of all the world's helicopters. Fun trivia to drop at parties. ;)

 

Is that 27% of the types of helicopter, or 27% of actual helicopters? If it's the latter then I'm guessing the more than 10 000 Mi-8/Mi-17s make up a huge part of that :) Probably more than all other types using the engine combined?

[d0ppler]

Yesterday I flew in mountain area and was flying @~4000m and playing around with the shkval and didn't monitor the engine gauges.

But suddendly I lost both engines how can that be?

I managed to get one engine startet right before I would have impacted the ground, so the engines were still working, must have been some kind of overload ... ?

My guess is that you didn't watch the EKRAN telling you to turn on Rotor Anti-Ice either.

[AlphaOneSix]

Is that 27% of the types of helicopter, or 27% of actual helicopters?

 

The latter.

 

If it's the latter then I'm guessing the more than 10 000 Mi-8/Mi-17s make up a huge part of that :) Probably more than all other types using the engine combined?

 

Probably! :D

[Bucic]

Is'nt torque measuring equipment rather complicated? I mean a dynamometer is not appropriate, given that it absorbs all the power that the engine produces. :) I would guess that it is measured by torsion of some drive-train part, which i imagine would be rather complicated.

 

Edit: Well i just read a little and have found, that torque measurement works indeed with strain gauges, which is not that difficult to realise but may be too fragile for russian military doctrine(?).

 

I can tell you that the torque-meters on some Eurocopters consists of two not very complicated metal sleeves with "crowns" and a hall sensor :)

[Coolhnd1]

Also, the TV3-117 series of engines powers 27% of all the world's helicopters. Fun trivia to drop at parties. ;)

 

I've heard worse pickup lines.:smilewink: