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-   -   Cumbria - Dauphin in the fog... (https://www.pprune.org/rotorheads/611774-cumbria-dauphin-fog.html)

AnFI 6th Oct 2018 13:13

Obviously pilots of this type need to have the ability to do this.
It might be a liitle embarrasing to be caught by the general public.
BUT the idea that these guys are not allowed to do this normally and are then to be expected to heroically figure it out for the exceptional circmstances when they will need it is dangerous and silly.
Especially under difficult circumstances you want to know exactly what you can and cannot do.
This should be in the 'can' category, these guys do not deserve the armchair criticism of distinguished ppruners.

arketip 6th Oct 2018 13:27


Originally Posted by AnFI (Post 10267352)
Obviously pilots of this type need to have the ability to do this.
It might be a liitle embarrasing to be caught by the general public.
BUT the idea that these guys are not allowed to do this normally and are then to be expected to heroically figure it out for the exceptional circmstances when they will need it is dangerous and silly.
Especially under difficult circumstances you want to know exactly what you can and cannot do.
This should be in the 'can' category, these guys do not deserve the armchair criticism of distinguished ppruners.

Ok, are you now saying that contrary to what Crab told us, they were not caught out by fast moving fog, but that they did that on purpose as a training exercise?

[email protected] 6th Oct 2018 16:41

Even I can't believe this is still going....

No, they didn't do it deliberately - no-one would be authorised to do that for training.

Have a look at the weather that existed in the SW of UK for most of last week - advection fog from a moist Southerly airflow cooling as it gets to cooler water and land - just like they get in California - fast moving fog happens very frequently in coastal UK and can persist a long way inland (the Lake District is close to the NW coast and has the same problem).

Low cloudbase and hill-fog forming and clearing as local effects and heating affect the relationship between dew point and temperature.

Of course this will be seen as a conspiracy to pervert the speculation of the armchair critics but it is just what happens.

DOUBLE BOGEY 6th Oct 2018 16:46

Round 7 - Damned Dauphin!

Not wanting to be a smarty pants but....the relationship between dew point and temperature is a constant. However Crab, I get the intention of your statement.

At least Anfi is not blaming the second engine from heating the air and somehow making the fog happen (Juxtaposition aside), Anfi may have finally moved on. At least he seems to accept the boys in green are justified in carrying the extra useless engine!

[email protected] 6th Oct 2018 17:31

Not wanting to be a smarty pants either but

Dew Point Temperature - Tdp

The Dew Point is the temperature where water vapor starts to condense out of the air (the temperature at which air becomes completely saturated). Above this temperature the moisture stays in the air.
  • if the dew-point temperature is close to the dry air temperature - the relative humidity is high
  • if the dew point is well below the dry air temperature - the relative humidity is low
If moisture condenses on a cold bottle taken from the refrigerator the dew-point temperature of the air is above the temperature in the refrigerator.

The Dew Point temperature is always lower than the Dry Bulb temperature and will be identical with 100% relative humidity (the air is at the saturation line). As air temperature changes the Dew Point tends to remain constant unless water is added or removed from the air.

The Dew Point temperature can be measured by filling a metal can with water and some ice cubes. Stir by a thermometer and watch the outside of the can. When the vapor in the air starts to condensate on the outside of the can, the temperature on the thermometer is pretty close to the dew point of the actual air.

the dew point is dependent on the relative humidity of the air and its temperature - but I know what you meant
However, I completely agree with your post otherwise

AnFI 24th Oct 2018 19:40


Originally Posted by DOUBLE BOGEY (Post 10267483)
...
At least he seems to accept the boys in green are justified in carrying the extra useless engine!

Not really. with that type of flying it's better to have big windows than 2 engines. Carrying "the extra useless engine!" didn't help this guy. His realistic-risk wasn't from engine failure. Spare engines cost payload, reliability and budget that costs lives of personel in landrovers etc. How many engines of a military pair were actually hit and disabled in AFG, where the a/c was able to carry on? but hey you bought up engines

chinook240 24th Oct 2018 20:26


Originally Posted by AnFI (Post 10291557)
Not really. with that type of flying it's better to have big windows than 2 engines. Carrying "the extra useless engine!" didn't help this guy. His realistic-risk wasn't from engine failure. Spare engines cost payload, reliability and budget that costs lives of personel in landrovers etc. How many engines of a military pair were actually hit and disabled in AFG, where the a/c was able to carry on? but hey you bought up engines

"Gordon held the aircraft on the ground to allow the troops time to board but it was struck by enemy fire, resulting in the loss of one of his 2 engines and an injured soldier. With only 1 engine running, Flt Lt Gordon re-calculated his aircraft’s performance electing to conduct a highly advanced low level transition away from the pick-up point".



https://www.gov.uk/government/news/r...ed-for-courage

krypton_john 24th Oct 2018 20:36


Originally Posted by chinook240 (Post 10291594)

Wow, great job flying that load out with one donk. Decision making under fire!

SASless 24th Oct 2018 21:01

Hand Salute!

An Award that was justly deserved and very well earned!

Commendations to all who participated!

That is my kind of Chinook Pilot!

CRAZYBROADSWORD 29th Oct 2018 08:38

not hard to find!! google anyone ?



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