Z-19 armed recon helicopter

Re: 3 advantages of directing helicopter engine exhaust upwards

Martian said:

1. By directing the helicopter engine exhaust upwards, it lowers the acoustic signature of the helicopter to potential observers on the ground. It's a good design feature for acoustic stealth.

2. Also, directing the exhaust upwards allows the helicopter blades to diffuse the hot exhaust gases. This is a good method of lowering the infrared signature of the helicopter.

3. When the helicopter is on the ground, you want the hot exhaust gases directed upwards and away from the ground crew. This is a good safety feature.

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3 and 2 are the same, so you lose!! No tofu for you
1, I don't get it. How does engine exhaust produce acoustic signature? And the chopper's main rotor is already loud enough it will drone out any other noise anyway.

Actually, there is one more advantage of that design and it is pretty obvious. If you point the exhaust upward, it obscure/shield the heat source away from being detected on the ground down below by the enemy soldiers. The soldier has to be on a position ABOVE the chopper to be able to target the engine exhaust, by which the exhaust is partially shield by the spinning fan blades anyway and the heat is dispersed quickly by the spinning rotor.

Just A Chinese Chopper Video:

Re: 3 advantages of directing helicopter engine exhaust upwards

Asymptote said:

3 and 2 are the same, so you lose!! No tofu for you
1, I don't get it. How does engine exhaust produce acoustic signature? And the chopper's main rotor is already loud enough it will drone out any other noise anyway.

Actually, there is one more advantage of that design and it is pretty obvious. If you point the exhaust upward, it obscure/shield the heat source away from being detected on the ground down below by the enemy soldiers. The soldier has to be on a position ABOVE the chopper to be able to target the engine exhaust, by which the exhaust is partially shield by the spinning fan blades anyway and the heat is dispersed quickly by the spinning rotor.

Click to expand...

Wouldn't the heat exhausted upwards complicate the airflow of the rotors though?

Besides, this is the latest photo of the Z-19 !

cheers but it's too small & blurry. where has martian the photo enhancing expert gone to?

Yes ... but I think from these one even Martian can't draw mayne new details ... this is so far the best I have.

Deino

What's so heavy abaft the rotor mast? I would expect the crew compartment to be heavy because of the armor protection. Then there is the gun under the nose. So what is he carrying further aft?

The Z19 doesn't have a chin turret. Probably because of weight issues and making it an armed recon scout instead of a true attack helo in my book.

it is a very beautiful helicopter

... white seems to be the primer !?