is it flaps?
 

am looking at a picture of Hanno PRETTNER and his Pattern plane of 1975 in the most recent MODEL AIRPLANE NEWS (March 2003) on page 34 (nice looking hat... )

QUESTIONS:

are those yellow protruding rectangles on the wings FLAPS?

why are they wider than the wing root chord?

IF they are FLAPS, would it be a good idea to install some on my 80s style .90 pattern ship? (well Hanno DID win in 1975 with those things right?)

if you have any info, let me know
OR if you know Mr. Prettner will you ask him for me? (don't say anything about the HAT thing... THNX) :D

is it flaps?
 

I believe they are brakes.

is it flaps?
 

I found the original article where they were described. They were used as speed brakes and flaps. When deflected some of the area deflected up and some down which would increase the profile drag of the airplane. The max deflection was 40 degrees.

Quoting from his article in Model Airplane News, Dec. 1976, he says, "Also highly desirable is the combination dive brakes and landing flaps as shown on the plans. The excellent low speed performance of the Curare is further improved with the flaps."

He was apparently able to use them effectively but he was also an extreme talent at flying.

I have a Curare without the flaps and it is a fun airplane. I doubt ( well no doubt at all) that I do it justice when I fly.

Ben
 

very interesting! exactly what I was looking for

would it be possible for you to send me a scan of the drawings?

[email protected]

THNX in advance :)
Vasek

is it flaps?
 

The pages are on the way.

Ben
 

I have not received any pages yet, if you have problems e-mailing me, please let me know

THNX
Vasek

is it flaps?
 

I tried to send to you and did CC to me which I received. Hotmail says that the attachments are too big. I will break them up into individual pages. Maybe that will work. We will get it there one way or another!

is it flaps?
 

please count me in on that email [email protected]