Luis,
My experience with Andrews type ribs ("banana" -due to shape) is they are
usually used on airfoils of longer chord, F1D being the one example I'm
familiar with. When Bruce Kimball was doing the early 55cm models, he gave
me a tutorial. His method is to slice the ribs from sheet stock, which I
don't do preferring molded. The description is for sliced ribs.
Bruce had a template using Formica sheet, the rib top being the outline on
the template and setting the camber. The template extended beyond the actual
chord length with the actual chord scribed on the outline. Offset aft about
.75-inch of the top scribes were a second set that were used to cut the
undercamber. The template was squared, so all he did was slide it down
parallel register lines to eye-balled rib depth.
His model was quite flexible and sturdy.
Bruce in Seattle
_____
From: Indoor_Construction_at_yahoogroups.com
[mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of Luis
Sent: Tuesday, March 07, 2006 3:03 PM
To: Indoor_Construction_at_yahoogroups.com
Subject: [Indoor_Construction] Andrew's ribs
Anyone out there who knows anything about the subject, your input will
be highly appreciated. I have noticed that, ussually, a rib breaks
near the middle, so it just makes sense to make it wider towards the
center. What do you know about the concept, and the guy himself?
Now, with a built-up prop with a spar that could go above or between
the ribs, how this affects the dimensions? Does it go wider at the
spar, or at the middle point between the outline and the spar?
SPONSORED LINKS
Radio
<
http://groups.yahoo.com/gads?t=ms&k=Radio+controlled&w1=Radio+controlled&w2
=Power+source&w3=Aircraft&w4=Flying&w5=Newcomers&w6=Outside&c=6&s=94&.sig=Es
fQpT8V1GQS_LXQINk3NA> controlled
Power
<
http://groups.yahoo.com/gads?t=ms&k=Power+source&w1=Radio+controlled&w2=Pow
er+source&w3=Aircraft&w4=Flying&w5=Newcomers&w6=Outside&c=6&s=94&.sig=n0th-p
6rWjH1SnxuQCF4CQ> source
Aircraft
<
http://groups.yahoo.com/gads?t=ms&k=Aircraft&w1=Radio+controlled&w2=Power+s
ource&w3=Aircraft&w4=Flying&w5=Newcomers&w6=Outside&c=6&s=94&.sig=SmvggSM9FZ
kzksMsqkxprw>
Flying
<
http://groups.yahoo.com/gads?t=ms&k=Flying&w1=Radio+controlled&w2=Power+sou
rce&w3=Aircraft&w4=Flying&w5=Newcomers&w6=Outside&c=6&s=94&.sig=9mqmZHUpd7xD
7beDurP4Lg>
Newcomers
<
http://groups.yahoo.com/gads?t=ms&k=Newcomers&w1=Radio+controlled&w2=Power+
source&w3=Aircraft&w4=Flying&w5=Newcomers&w6=Outside&c=6&s=94&.sig=hAPB0IusK
s8gZzid5It3_w>
Outside
<
http://groups.yahoo.com/gads?t=ms&k=Outside&w1=Radio+controlled&w2=Power+so
urce&w3=Aircraft&w4=Flying&w5=Newcomers&w6=Outside&c=6&s=94&.sig=nbN2SoHS3P2
PPeniSHtkKg>
_____
YAHOO! GROUPS LINKS
* Visit your group "Indoor_Construction
<
http://groups.yahoo.com/group/Indoor_Construction> " on the web.
* To unsubscribe from this group, send an email to:
Indoor_Construction-unsubscribe_at_yahoogroups.com
<mailto:Indoor_Construction-unsubscribe_at_yahoogroups.com?subject=Unsubscribe>
* Your use of Yahoo! Groups is subject to the Yahoo!
<
http://docs.yahoo.com/info/terms/> Terms of Service.
_____
[Non-text portions of this message have been removed]
Received on Thu Mar 09 2006 - 19:24:52 CET