FlugWerke 190Dora

[bdk]

Concerning the accident of Mark Hanna, according his father ( well known and late Ray Hanna) and the British experts who analyse the cause of crash, After making a low pass, Mark "pull-up" to reach the approach pattern, during this manoeuvre, the slats open, creating local but heavy turbulence. On final approach, at low speed, the 109 cross its own turbulence and stall.

The biggest source of turbulence are wing tip vortices, the power of which is proportional to the lift being produced. While slats do allow for a higher coefficient of lift on the wing, but the increase in lift is not huge.

Every time you do a loop or a level 360 degree turn, you should expect to fly through your own vortices, but typically you aren't flying near stall speed.

I've never heard of someone crashing due to their own vortices, but that doesn't mean it can't happen I guess. There have been a number of accidents due to flying though other aircraft's vortices when following too closely so I suppose it is possible.

[Michel Lemieux]

Rich, any close-ups n the engine ?

Still curious as to how they did the exhaust "custom" job with the Allison.

Michel

[DoraNineFan]

Rich, any close-ups n the engine ?

Still curious as to how they arranged the exhaust with the Allison.

MIchel

Here is a picture from their website, showing the custom stacks. I'm assuming they have some form of heat shield for them too.

[Michel Lemieux]

Tks DNF.

I had seen that one a good while back.

I'm more curious to see the assembled final assembly on the bird.

Michel

[DoraNineFan]

That's odd looking.

I hadn't really looked at it before, but that's a curious layout behind the prop. Is that a circular radiator, or 6 tandem square radiators arranged in a circle?

Edit: That's clever. If those are square radiators, they would be much easier to service and replace than copying an original unit. It goes with FlugWerks' original goal of keeping operating costs down.

Here's a couple of shots from my friend Jeff, taken last spring:

[Michel Lemieux]

or 6 tandem square radiators arranged in a circle?

Unless all soldered with solid joints together, that would make for a "lot" of piping & collar joints between each

[skooterN2767K]

Guys, thanks for the replies and info! Sorry that I sounded like I was venting. I guess I was a bit I guess I sort of knew the answer to the 109s ground handeling. I own and fly a 1947 Luscombe 8E which also has a horrible ground handeling reputation than is well exaggerated and underserved. A friend of mine also has a Luscombe 8A he has owned for the last 22 years without any gorund handeling issues Dan.