And an aircraft carrier has the ability to be turned to face directly into the prevailing wind, … assuming wind speed is 15kts, and the carrier can also steam at 15kts, this gives a cumulative windspeed/airspeed down the flight deck of 30kts – a not insignificant benefit on take off. It’s 30kts less you need to gain/achieve when accelerating your ‘plane from a standing start.
Paul F
Thanks for that Paul đ I didn’t include all that because I thought it was stating the obvious. But then I guess I was wrong and its isn’t obvious to many who haven’t been there and done it and know what it is like bracing oneself against the wind over the deck during launch, and during recovery for that matter.
In my time on Ark we used to stay put in Phantoms down in Fly 4 (far aft port side) whilst recoveries were under way once having started engine test runs.
Quite an interesting view of every deck arrival. I was thinking of taking a camera with me on one such occasion but by then somebody had decided that the practice of sitting in Phantoms in Fly 4 with aircraft screaming in across ones nose was a tad dangerous.:D
And the speeds you quoted are conservative on both wind speed and carrier speed.
A London 2012 spokeswoman added, ‘…that the organising committee was âabsolutelyâ happy with the logo and had no intention of going back to the drawing board. âItâs launched a creative explosion across the country. Itâs fantastic,â she said.
It is a great pitty that the Olympic Committee did not take adavantage of an ‘explosion of creativity’ rather than paying large sums of money to cave artists to come up with such an unnatractive logo.
I feel sorry for the poor girls trying to defend the indefensible.
It should be changed, and PDQ.
A London 2012 spokeswoman added, ‘…that the organising committee was âabsolutelyâ happy with the logo and had no intention of going back to the drawing board. âItâs launched a creative explosion across the country. Itâs fantastic,â she said.
It is a great pitty that the Olympic Committee did not take adavantage of an ‘explosion of creativity’ rather than paying large sums of money to cave artists to come up with such an unnatractive logo.
I feel sorry for the poor girls trying to defend the indefensible.
It should be changed, and PDQ.
sorry, If you apply the brakes on an aircraft and run the engines at 100% most aircraft won’t move. I do it all the time, you can see aircraft do it when they do a “rated takeoff”
The operative word there being ‘most’. The aircraft you do it on all the time are probably quite different from those of my experience.
…the F4 Phantom proved the theory that with enough thrust you could fly a housebrick. But he is correct in the general assumption that with no wing an aircraft will not fly.
And it was one of these I have in mind, an F4K to be specific. One did not even have to engage afterburner (re-heat) on one of these to overcome brakes and chocks. This is the very reason why we when doing full power-runs and re-heat runs were required to used the arrestor hook hold back whilst on Ark and alameda (not sure of spelling) chocks whilst ashore. These latter consisted of a pair web re-inforced steel angle plates bolted into concrete with the aircraft being pulled forward so that main wheel tyres were firmly abutting the steel angle. Then another pair of steel re-inforced angles would be bolted down aft of the wheels.
To be sure most aircraft did a power run up against brakes at runway threshold prior to take off and I watched many a Vixen, Hunter, Buc’, Scimitar or Phantom do this.
As to the original question I agree with those that state that without airflow over an aircraft mainplane then no lift will be generated for take off.
Driving the aircraft forward at twice the speed of the conveyer going in the opposite will achieve little other than making the wheels rotate at twice the rate normal for take off and thus likely reach their rotation speed limit sooner and disintigrate.
This ground speed limiting factor is one of the reasons behind the fact that aircraft are capabable of being shot off of carrier cat’s at higher weights than mostly possible from an airfield runway. Particularly at high ambient temperatures, besides by design a carrier shoots aircraft off at near sea level so altitude can be another limiting factor for many airfield take offs.
This latter is a little broadcast fact the the air force would rather politicians not know about.:diablo:
Once again I have been logged out before completing a post and thus the New Posts facility is once again meaningless.:mad:
Many happy returns to Henry Allingham, born June 6 1896 and still going strong.
He is one amazing fellow. Happy birthday Henry.
I have had the pleasure of meeting him on two occasions and he can certainly talk.:)
We are fast today aren’t we!
I have taken a strong dislike to the logo, and voted ‘wooden spoon’ along with 83% of others on this site:
http://news.bbc.co.uk/sport1/hi/other_sports/olympics_2012/6718243.stm
I trust we will all do the same, let good sense prevail!!!
I have just voted a wooden spoon, although that is far too mild I would consider the stocks to be a more apt award for the perpetrators of this national disgrace.
We are fast today aren’t we!
I have taken a strong dislike to the logo, and voted ‘wooden spoon’ along with 83% of others on this site:
http://news.bbc.co.uk/sport1/hi/other_sports/olympics_2012/6718243.stm
I trust we will all do the same, let good sense prevail!!!
I have just voted a wooden spoon, although that is far too mild I would consider the stocks to be a more apt award for the perpetrators of this national disgrace.
Does anyone what Scientology is , something to do with Aliens?
Some folk here seem to have missed the recent furore over the BBC Panorama programme which had a look at this and the unfortunate explosion of the BBC interviewer John Sweeney, an explosion which can be understood by the actions of the scientologists and the invasion of Sweeneyâs body space.
See:
http://news.bbc.co.uk/1/hi/programmes/panorama/6655207.stm
and, if you can, watch the video behind the âWatch Panorama: Scientology and Me.
Scientology a would be religion, more a cult, founded on the lies and frauds of one L Ron Hubbard, much loved by those with more money than sense or unfortunately those with not that much money seemingly many of the latter have been taken in and defrauded of not only their cash but their life causing much distress to their families in the process.
Further discussion can be found at:
and
http://richarddawkins.net/article,1068,Row-over-Scientology-video,John-Sweeney-BBC-News
Scary stuff, particularly when a senior police officer, Chief Superintendent Kevin Hurley, appears to endorse this organisation with his presence at the opening of their new London headquarters
Watch out for this crowd pushing for charitable status.:eek:
Rowland White must be dead chuffed with the response the book has got.
He is. I discussed a few errors with him when he came to visit me whilst researching for a future book, I will not say what it is about for now.
I was most impressed by his courteous and interested manner. Rowland clearly puts in much diligent research whilst preparing a book.
That does sound like a right planning balls up!
Maybe the exit restriction was security driven.
I am considering purchasing the Sigma 50-500 zoom.
I purchased one of these lenses with Minolta AF fit for use on a Dynax 7 (film body). With film one could shoot with Fuji Provia 400F and push process by one (800 ISO) or two stops (1600 ISO), one stop best.
The lens has succesfully migrated to a digital Dynax 7D and Sony Alpha cameras.
My experience suggests that the Sigma 50-500mm will autofocus in good light but adding converters makes manual focus operation a must. I have both 1.4x and 2x Sigma converters and if I were you I would go with Sigma if you are purchasing these. Believe me I have found in practice, particularly with digital, that the 1.4x converter is of the most utility.
Manual focus following aircraft around the sky, particularly fast jets requires some practice, and strong arms, with this lens. Adjusting zoom and focus simultaneously with the Sigma whilst doing this is not a realistic proposition IME, choose your shot and focal length and then follow and shoot when right, just like we used to do in the old days with telephoto lenses before good zooms became available, let alone affordable.
I have tried both converters together, one picture being of the moon seen on my website, unfortunately there was a little high very thin cloud drifting in from the north which has muted the definition a little particularly at the top left sector.
Ottakers now have the softback on half-price offer
Moggy
Ottakers? I thought they had been taken over by Waterstones.
Not nit-pickin just surprised as our local Ottakers is now Waterstones and I recall reading in the lead up to the take-over.
to be honest, i really don’t know why they aren’t after the one at BAe Filton??? wasn’t that the last one to fly? surely that would be a better candidate?
There is no way that this one could go again. I know people in the Fleet Air Arm Association who worked at Filton, indeed some of the local branch have been involved in her display. I have been told that, as in the TSR2 story, measures have been taken to ensure resurrection is impossible, such as electrical looms being removed or cut amongst others.
Very lucky the swarm wasn’t ingested into both engines
That would have bee….n a disaster.:D
Any body got the buzz on what the aircraft and engine types were?
What’s the 206 Sqn (Coastal) connection? (VX codes).
And, Phixer, I can’t see any reference to the need for helmets in the thread you’ve indicated, unless I’m being think… (Perfectly possible, of course.)
There are two pic’s of Tiger Moth K-4259 with myself in the front and both occupants wearing bone domes indicating that it could be common, and sensible, practice these days.