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Search: Posts Made By: Deskscribbler
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Forum: Tech Log
26th Oct 2021, 20:21
Replies: 49
Views: 10,894
Posted By Deskscribbler

Sideslip does build during a spiral dive though?...

Sideslip does build during a spiral dive though? The spiral tendency being partly a balance between directional stability reducing sideslip and the dihedral trying to use said sideslip to roll more...
Forum: Tech Log
26th Oct 2021, 18:18
Replies: 49
Views: 10,894
Posted By Deskscribbler

It's a curious mix of the original poster's...

It's a curious mix of the original poster's "outer wing faster", vs. the dihedral which will tend to return things to wings level. Other things affecting it are the size of the fin and directional...
Forum: Military Aviation
18th Feb 2021, 11:30
Replies: 39
Views: 9,155
Posted By Deskscribbler

One other way to think of the Sukhoi/F22 etc. TVC...

One other way to think of the Sukhoi/F22 etc. TVC is by drawing a vector diagram.

To pitch the nose up, the donks alter their axis of thrust giving a vertical component. Say, a 20 degree offset....
Forum: Rumours & News
27th Dec 2019, 23:43
Replies: 148
Views: 252,554
Posted By Deskscribbler

On the HOTs, -12C in freezing fog can give HOTs...

On the HOTs, -12C in freezing fog can give HOTs as low as 20-25 minutes with certain SAE Type II or IV fluids (per this winter season's FAA guidance).
Forum: Tech Log
10th Jul 2019, 20:02
Replies: 11
Views: 9,976
Posted By Deskscribbler

OK... a symmetrical aerofoil doesn't. But any...

OK... a symmetrical aerofoil doesn't. But any standard cambered aerofoil fitted to the vast majority of flying things will. Horizontal stabs are often inverted aerofoils to produce 'negative lift' at...
Forum: Tech Log
10th Jul 2019, 19:26
Replies: 11
Views: 9,976
Posted By Deskscribbler

This is a really interesting one. All wings...

This is a really interesting one.

All wings will produce SOME lift at zero AOA. Look at a typical lift curve slope, you have peak CL at something like 1.0 or so at an AOA of 15 degrees (just...
Forum: Rumours & News
11th Mar 2019, 07:58
Replies: 5,109
Views: 13,197,593
Posted By Deskscribbler

More pertinent here is flight with reduced static...

More pertinent here is flight with reduced static pitch stability. Basically, reducing static stability margin (flying with the CofG and centre of pressure closer together) means you need less...
Forum: Military Aviation
5th Feb 2019, 23:04
Replies: 40
Views: 17,965
Posted By Deskscribbler

It's bizarre, I'll give it that! If it's real,...

It's bizarre, I'll give it that! If it's real, it's very odd indeed - and knowing the Russian's love of fakery at the moment you never know...
Forum: Military Aviation
4th Feb 2019, 18:34
Replies: 40
Views: 17,965
Posted By Deskscribbler

Sorry if I'm being a bit daft (or stating the...

Sorry if I'm being a bit daft (or stating the bleeding obvious) - but isn't the 'footage' from a computer game? Specifically the 'LockOn' or 'Digital Combat Simulator' series? The Russian media used...
Showing results 1 to 9 of 9


 
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