Silly aviation pictures.

[onetrack]

Quote

Given the design of bifold, how does a wind force bar a vertical download make such a door slam when they act as wings into the approaching wind, thus wanting to stay in the folding position?

That's not how it happens. Wind force approaching the half-open door directly, simply forces it to shut, because it's hinged in the middle. The force of the wind is simply applying pressure to the two halves of the door. Whether that pressure is at an angle, or straight-on, is irrelevant, the door is simply a big sail, and moves with wind pressure.

 

A mate fell 4 metres onto concrete when fixing the upper door track on vertical bi-fold doors. He'd tied the door back, partly-open, against the prevailing wind, set a ladder against it and went up to work on the track. The "light and variable" wind rapidly reversed with a gust in the opposite direction, and the door whipped back against the untied direction, throwing the ladder and my mate back onto the concrete. It was a hard-learnt lesson, he shattered his left femoral shaft and left elbow, ending up with a full length stainless pin in his femur, and a plate and screws in his elbow - and 6 months in a wheelchair. 

 

Strong wind gusts can even overcome mechanical and hydraulic door operating mechanisms if they're pushed beyond their design limits. And strong wind gusts can happen within seconds, willy-willies are the classic example.

[facthunter]

Those doors are not fit for purpose. Too much response to wind. The old fashioned heavy sliding doors are time tested and a work out for the people opening and closing them.   Nev

[Old Koreelah]

We need a thread just on hangar doors, which probably cause more injuries to  pilots than air crashes.

 

Our club didn’t have the real estate to fit sliding doors, so went with vertical bifold. They are pretty easy to build but very wind sensitive; I’ve been thrown several metres by one. Most of the time it should be less of a problem than commercial operations- our toys mostly come out to play in good weather.
 

Recently a roller bolt broke, which had me three metres up a ladder -a year after a fall onto concrete broke my hip.

 

I always liked horizontally folding doors, but maybe they’d be safer if they were flat (recessed into the ground) when open. The upper section could be designed for planes to roll across it.

[red750]

[facthunter]

I recall at Port Macquarie an East West Airlines skipper got out of a DC 3. using a walking stick for real They used to be known as Eenie Weenie Airlines. Based in Tamworth and a nice mob..  Nev

[spacesailor]

Well , that English man , flew his trike from the UK & was invited to land at ' Mascot airport ' .

Must have had a ' blooody long white cane '' . LoL

spacesailor

[pmccarthy]

Best story ever was from the 1920s. Aussie captain on a London to Paris flight came out of the cockpit unrolling some string. On the way to the dunny at the back he handed the end to a passenger and said if the nose goes down, pull the string. They didn’t know he had a co pilot.

[Marty_d]

1 hour ago, pmccarthy said:

Best story ever was from the 1920s. Aussie captain on a London to Paris flight came out of the cockpit unrolling some string. On the way to the dunny at the back he handed the end to a passenger and said if the nose goes down, pull the string. They didn’t know he had a co pilot.

They had dunnies on 1920's passenger planes?

[onetrack]

Toilets were introduced in 1928, apparently - but I don't think they were anything more than a modified bucket, in that era.

 

https://simpleflying.com/interwar-period-flying-guide/

[red750]

Don't forget the chocks...

 

[facthunter]

Replace all divots.  There's no sign of how it got there.  Nev

[old man emu]

Wel. it can't be a helicopter because the ground is holding on to it. Everyone knows that the ground rejects helicopters.

[facthunter]

I guess it's supposed to be a nosewheel but it has no scissors link and doesn't look anything like one. That grass and mud has probably just been placed there after the fake wheel was.   Nev

[onetrack]

You blokes should know there's more flying things than just aeroplanes. It's the front landing gear on a CH47 Chinook - the front wheels are duals, the rears are single wheel. 

 

They normally land straight down, so rarely very much by way of any skid or drag marks. Sorry about the photo quality, it's over 50 years old.

 

 

Edited October 23, 2023 by onetrack

[facthunter]

Yes, everyone should be able to recognise that. Why the chocks though?  Nev

[onetrack]

Somebody just being silly, they placed the chocks there for a laugh, just for the photo.

[spacesailor]

To stop the ' wind ' moving it .

spacesailor

[red750]

[facthunter]

Very Easy to do.  Nev

[onetrack]

Stand and ride, hands free, on a delta wing canard aircraft? I'm not entirely convinced that would be easy to do.

[facthunter]

What plane is it?   Nev

[onetrack]

It looks like an Infinity 1 to me.

 

https://infinityaerospace.com/product/featured/infinity-1-quick-build-kit-canard-sport-aircraft/

[facthunter]

Easy to put it there and just put lights on it.. Nev

[red750]

Rutan Varieze. Rudolph is getting a bit old and slow.

[Marty_d]

There's one of them sitting in a paddock slightly north of Campbell Town in Tas, you can see it from highway 1.  Been there for years.  If you look at Google Maps with the satellite feature you can spot it.  To the right of the highway as you're going north.