Paul H

Help,

my crop tool (Not select, the actual crop tool) has changed (I don't know how or what I did). I used to be able to crop rectangles of any size and shape I wanted, now I can only crop the sizes on the drop down list.

Also, when I select the brush tool, and the selection pot (This is for brushing in a difficult selection.....the area turns red after brushing which is then used as a selection) area it tells me the channel is locked.

????

In the competition for the JSF, (Now F-35) do you think Boeing were paid off to fail?

A company with such a history and skill were totally beaten in that competition. Their aeroplane prover was a terrifyingly ugly failure.

I just can't believe a company as good as Boeing got it all so wrong.

Does anybody else suspect they were paid to fail?

Oh, I'm British and I was part of the JSF team in the early days and have no axe to grind either way.

I just can't remember.....it should be simple, D'oh!

A cable has to run on the outside of a drum.

The drum has a diameter of 118 inches.

The drum is 60 inches long.

The cable starts at one end of the drum, runs at 45 degrees until it reaches the other side. How long is that cable?

I have been doing it the very easy way and ignoring the fact that it's on a drum and just using 60/sin45 gives 84.85 inches of run....but I know it is slightly longer that that.

Formula please, and I assume the formula can be applied to all possible drum diameters and widths. The angle is always 45 degrees.

In the Boeing versus Airbus thread of last night, a poster claimed that Carbon didn't melt and was more fire resistant than ally yum yum.

Please show proof of this.

The poster also listed a plethora of Aircraft "Made of Carbon". The truth of that is that the panels, covers, Fin/rudder etc. were carbon. The A400 is the 1st aircraft to have a fully carbon wing spar and it's not in the sky yet.

The fighters and B-2 are so compact in design that the carbon spars are short and stiff. And, the pilot can always pull the "mummy" handle if he gets a fire.

The 787 has a fabricated carbon spar method, but it will still melt to black powder at about 575 deg F.

The fact is, no airline manufacturer has had the nerve to try a full carbon A/c primary structure until now, and I do not believe the industry is ready for it. I am involved in making such A/c structures.

Please explain and correct me where wrong.

I know that the maximum RPM of an engine dictates the maximum speed at which air can enter it. So when the craft is travelling faster than that speed, there is an ingenious inlet design.

I know that the design of the inlet creates a shock wave to kill the energy in that air, and slow it down.

(This is more so in Supersonic but I'm sticking to subsonic)

So, if a craft is travelling at 600mph, and (Say) the max intake speed is 500mph....

What happens in front of the engine? Is there a build up of air that can't get into the engine?

That would cause a hell of a lot of drag, how is that dealt with?

Please explain in detail as this sort of thing is best described with drawings....but we don't have them.

Cheers!

I've owned one since they were launched in 2004. I'm not changing it until 2008 budget allows a DSLR, but I wondered if any other owners find the Battery life is short?

I bought a 2nd battery for it lately, that's made no difference.

I estimate I get 150 shots. I shoot on jpeg high qual.

Please don't post tips on using the camera in a better way to save energy, I do all that as a matter of default and have been taking pics for 35 years. Cheers.

Round these parts, December 21st is the longest night, but it isn't the Darkest night....which I believe is Dec. 23rd.

Explain.

Extra marks for showing your workings in the margin :-)

Circle, 12 feet diameter.

Pins sticking out of the circle, 0.3 inches.

Imagine the the chord line as secure base for the pins (Therefore pins are longer towards the middle but still only protrude 0.3").

The pins can vary to a maximum of 3.5 degrees off tangent.

What is the widest chord possible given the above?

If all the pins were tangental, the pins could not be withdrawn inwards from the circle. This is the key part, the pins which are attached to the chord must be able to move inwards, hence using the 3.5 degree allowance to keep the pins at 90 degrees to chord.

I hope she's alive.