Interesting, Odd or Funny Pics II.

**JDNSW** · 12th October 2019, 06:14 AM

Originally Posted by V8Ian

I wonder how many planes he broke before getting those manoeuvres down pat!
I'd be interested in the physics of flying at ninety degrees to horizontal, that might require JD's expertise.

You will notice that in all the scenes where it is flying with the wings vertical, and not descending, the fuselage is angled with the nose pointing a little above the horizontal. This both gives a vertical vector component to the propeller thrust, but probably more importantly, gives a positive angle of attack for the parts of the airframe you see in side view, mainly the fuselage and interplane struts, acting as lifting devices.The fin and rudder will not be significant contributors to this as they are behind the centre of gravity, and hence will be pushing down to provide this positive angle of attack.

**Old Farang** · 12th October 2019, 02:23 PM

Originally Posted by JDNSW

You will notice that in all the scenes where it is flying with the wings vertical, and not descending, the fuselage is angled with the nose pointing a little above the horizontal. This both gives a vertical vector component to the propeller thrust, but probably more importantly, gives a positive angle of attack for the parts of the airframe you see in side view, mainly the fuselage and interplane struts, acting as lifting devices.The fin and rudder will not be significant contributors to this as they are behind the centre of gravity, and hence will be pushing down to provide this positive angle of attack.

Sorry, it is much more involved than that. The model is based on a Pitts Special aerobatic aircraft. It's power to weight ratio is much more than 1, and it is quite capable of "hanging on the prop" through power alone. In "knife edge" flight where the wings are at 90 degrees to any relative airflow, the huge slab sided fuselage does provide lift. It also has huge tail plane fin combined with a very big authoritative rudder. It is very "short coupled" in respect to rudder control, so it will also contribute to lift. Yes, there are complex thrust vectors at play, but that is only part of the whole package.

Also not mentioned; the "ground effect" when he brings it into what is near enough to a hover, is very much in evidence as seen by the smoke pattern as it hits the ground. Almost a helicopter!

**Homestar** · 12th October 2019, 08:47 PM

Got a couple of hours to kill? 👍

**sashadidi** · 20th October 2019, 02:21 PM

109_FB_IMG_1570451252841.jpg

**scarry** · 20th October 2019, 03:42 PM

Originally Posted by sashadidi

109_FB_IMG_1570451252841.jpg

Pic of a few AULRO members out for a drink?

**V8Ian** · 20th October 2019, 03:56 PM

Looks like a fridges' convention.

Isn't that Des on the far left.

**scarry** · 20th October 2019, 05:06 PM

Originally Posted by V8Ian

Looks like a fridges' convention.

Isn't that Des on the far left.

Nah,we wouldn't be on that side of the bar,we would be on the other side fixing something,and having a drink on the house...

Not stupid those fridgies

DiscoMick · 21st October 2019, 08:24 AM

So this was outside when we got up this morning. Did we have a large snapping visitor during the night?

Or is it just a freshwater spring?

**Fifth Columnist** · 21st October 2019, 03:32 PM

Yes

DiscoMick · 21st October 2019, 04:00 PM

This is what happens to Toyotas when they get stuck on the beach and the tide comes in.

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