Airbrake Terry 2.

Hi Karl,

I wouldn't say they were easy to hold full open, but not excessively firm either. I will measure the surfaces for you next time I am out to the airport, probably next week end.

Regards,
Terry



From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Karl Heindl
Sent: Monday, August 30, 2010 11:53 AM
To: europa-list@matronics.com
Subject: RE: Europa-List: MG Airbrake question



Terry,



I am just curious. You say the brakes are easy to hold fully open. I wonder why that is so. Could you please let me know what the dimension front to back is of the airbrakes. If they are slightly smaller than mine, then that would explain it. My control surfaces were pre-manufactured somewhere else.

Did you check that the extension in flight is the full 60 degrees ?



Karl






________________________________

Subject: RE: Europa-List: MG Airbrake question
Date: Mon, 30 Aug 2010 10:08:10 -0700
From: terrys@cisco.com
To: europa-list@matronics.com

This sounds like an interesting idea. Our airbrakes don't seem to require too much effort, but do not provide enough drag. Even with full airbrakes, we often end up floating well down the runway. If drilling holes in the surfaces increases drag, I would be interested in trying this.



Regards,

Terry Seaver

A135/N135TD

XS monowheel, 912S and Airmaster prop, currently with long wings installed





From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Kaarsberg
Sent: Monday, August 30, 2010 2:18 AM
To: europa-list@matronics.com
Subject: Re: Europa-List: MG Airbrake question



Speed brakes such as those fitted on a Caravelle was full of holes, this provided for more turbulence and hence resistance per square inch of surface in the wind.



Alex, kit 529

Enviado de meu iPhone


Em 29/08/2010, Ã s 00:50, Karl Heindl <kheindl@msn.com> escreveu:



Hi motorglider guys.



Has anyone made any changes to their airbrakes ? I find they requires a lot of force to hold them in the fully open position. The air pressure on the bottom half far exceeds that on the top.

Because of that it is also impossible to get the maximum deflection of 60 degrees. I mounted an angle indicator, and it shows about 45-50, which severely degrades their performance.

I don't understand why nothing was ever done about this. They have been producing these wings for about 11 years now.

The obvious solution to me is to reduce the area of the bottom half, either by putting in holes, or trimming back the trailing edge.

These brakes are not really necessary with the engine running, but are essential when I get to making dead stick landings.



Karl