I believe Emil was rotating the leading edge to 45 degrees in the mid 1990's. Of course, I copied the idea as soon as I learned about it.
Gary
-----Original Message-----
From: 'William D. Gowen' wdgowen_at_gmail.com [Indoor_Construction] <Indoor_Construction_at_yahoogroups.com>
To: Indoor_Construction <Indoor_Construction_at_yahoogroups.com>
Sent: Mon, Apr 4, 2016 9:36 am
Subject: Re: [Indoor_Construction] leading edges
The earliest picture I have of my A6 with 45 degree LE is dated 2007. I believe I used it in 2006 but don't have any pictures or plans showing that. I have a picture of my first version of my current model made in 2006 but it shows a sharp LE made by extending the condenser paper past the LE and then folding it back to the underside of the LE. I decided that was probably pushing the good will of the CD a little too far so went with the 45 degree LE on the next wing I built.
On 4/4/2016 9:54 AM, Warthodson_at_aol.com [Indoor_Construction] wrote:
The first time I saw the leading edge of a wing on an indoor free flight duration model rotated 45 degrees was on Emil Schutzel's A6, many years ago. He is not on this list, so I thought I would give him credit for the innovation & try to smoke out more discussion on how old this idea really is.
Gary Hodson
-----Original Message-----
From: upwind120_at_gmail.com [Indoor_Construction] <Indoor_Construction_at_yahoogroups.com>
To: Indoor_Construction <Indoor_Construction_at_yahoogroups.com>
Sent: Sun, Apr 3, 2016 8:02 pm
Subject: [Indoor_Construction] Re: Is there a simple way to lay out different camber arcs?
Banana ribs…after I find the sweet spot on the french curve, I mark the chord on it with a Sharpie a tiny bit overlength (the ribs will be cut to the correct length later in the process). Then I move a little further along the french curve, toward the straighter end, and mark the chord in a different color. That becomes the bottom contour of the banana rib.
Now I use the one template (the french curve) to cut tops and bottoms just by sliding it right and left on the blank. If I'm building a wing with a Gowan style front spar it's easy to make the front .08 (so I can notch it) and the back end .06.
I'm working on a P-18 whose plan calls for the top of the front spar to be radiused, presumably for aerodynamic purposes. This further weakens the most vulnerable stick in the whole model. Rolling the square stick 45º like OlBill does is the natural solution.
a.
Received on Mon Apr 04 2016 - 09:22:36 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET