Pure Gold Aviation Pollution At Its Beautiful Best

Blue Punto

This must have been one of the last CV-880 Flights ever

(Forward to 5.45 to see the take off)
Feel sorry for new spotters that they will never see this stuff for real
http://www.youtube.com/user/RyanBomar

stopthepanic

A good old fashioned 'coal burner', what a sight!!!

If you saw smoke like that from a modern aircraft you'd ring the emergency services.

Nforce

How about a B-52 MITO (minimum interval take off) for smoke?

https://www.youtube.com/watch?v=Cq6Hpxyrhyo

:eek:

Delancey

Nforce wrote: »

How about a B-52 MITO (minimum interval take off) for smoke?

https://www.youtube.com/watch?v=Cq6Hpxyrhyo

:eek:

I read somewhere that the cause of all the smoke from B 52's taking off was because they used '' water injection '' - anyone have an idea what this means ? How did it work ?

owenc

Blue Punto wrote: »

This must have been one of the last CV-880 Flights ever

(Forward to 5.45 to see the take off)
Feel sorry for new spotters that they will never see this stuff for real
http://www.youtube.com/user/RyanBomar

Oh my god look at the smoke if i seen that in today's planes i'd **** mysel. And to be honest i'm pretty happy that i don't see such a thing, while the engines are nice i don't think i'd like that smoke.

westdub

There are a few old smokers still flying......

MoeJay

https://www.youtube.com/watch?v=wJ7niLYSVFo

Apologies for the daft commentary, but this is slightly less staged...!

stopthepanic

http://images3.jetphotos.net/img/1/5/4/8/48956_1242667845.jpg

Tenger

stopthepanic wrote: »

If you saw smoke like that from a modern aircraft you'd ring the emergency services.

Very true, about a year ago a DC-8 was on finals into Baldonnel, went over our heads at about 2-3000 ft trailing smoke from engine 3, the missus obviously thought it was an emergency and didn't quite believe me when I told her that was normal for those.

marketty

Delancey wrote: »

I read somewhere that the cause of all the smoke from B 52's taking off was because they used '' water injection '' - anyone have an idea what this means ? How did it work ?

Some jet engines from the 50s and 60s did indeed use water injection, although I'm not sure how much this did or didn't contribute to the coal burner effect.
Water injection in a gas turbine can be used in two ways. First it can be used to cool the air at the intake and thus increase the air density. This is particularly useful at hot and high airports where the thin air reduces the power of the engine.
Secondly the water can be injected into the combustion chamber. The effect here is to cool the air again, but for another reason. In a combustion chamber it is not desirable to combust all the air being fed in as this will result in intolerably high temperatures that the chamber and turbine can't handle. So the fuel flow is controlled so that not all the air passing through the chamber is combusted, and this 'tertiary' air is used for cooling (it's cooler air but still quite hot!). So here's where the water injection comes in. By injecting water into the combustion chamber the temperature of the cooling tertiary air can be decreased, allowing for more efficient cooling. This means less tertiary air is required, therefore more air is available for combustion, so more fuel can be added and ultimately more power generated.
This system was only really applied on turbojet 'straight through' engines, before modern bypass turbofans were developed. The gains in power weren't great considering the weight and complexity of the system. It was a means to an end as engines at the time needed all the help they could get to produce a good power to weight ratio, advances in materials and engine design quickly made it an obsolete technology