Oh so Don is using the old serrated LE trick huh?
If this flatlander decides to fly HLG at your esteemed site it will probably be my old Poker. The DLG is a total bust at this point in time. No climb, no transition, no glide.
----- Original Message -----
From: rreyno2001
To: Indoor_Construction_at_yahoogroups.com
Sent: Monday, February 12, 2007 9:11 PM
Subject: [Indoor_Construction] Re: IHLG Flappers
--- In Indoor_Construction_at_yahoogroups.com, "Don DeLoach "
<ddeloach_at_...> wrote:
>
> Randy,
> The Colorado Springs Auditorium is just under 37' at its peak, 36'
9" if I
> recall. The official measurement (15M circle method) is closer to
31'.
>
> I took these measurements myself in 2005.
>
> The best single glider flight we've ever seen in there was
Romash's 40.0.
> Assuming the model settled and started gliding at 36', his sink
rate was .9
> ft./sec.
>
> Thermals
> Don
I stand corrected. Of course I think any flatlander who comes up
here to fly at out altitude would find existing competition at a
pretty high level. Further I should mention that Don himself
regularly beats the crowd with a glider he built in high school
compleat with a serrated leading edge from many collisions with
obstructions. Shame, shame!
>
> -----Original Message-----
> From: Indoor_Construction_at_yahoogroups.com
> [mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of
rreyno2001
> Sent: Monday, February 12, 2007 12:53 PM
> To: Indoor_Construction_at_yahoogroups.com
> Subject: [Indoor_Construction] Re: IHLG Flappers
>
> It seems that there are a lot of similar experiences but perhaps
> what is needed is some common data on the flaps themselves. As a
> guitar maker deflection testing is commonly done in my craft to
find
> the lightest/strongest wood and wouldn't something similar make
> sense here? perhaps not the strongest per weight but most flexible
> per weight??
>
> Chris mentioned to me that he tests the flap by measuring on a
gram
> scale how many grams it takes to deflect the flap to zero
degrees.
> He feels that number should be one half of the glider weight.
> Hopefully I have that right.
>
> It would also seem that actual measuements of the flaps are only
> somewhat useful given the above since the flexural strength of
each
> individual flap wood can differ.
>
> Personally I prefer to develop a sense of this rather than measure
> preferring things to be intuitive but in this case I don't really
> have enough experience to do that.
>
> Talking of times....I am envious of the times I see being
mentioned
> under Cat I sites where our own Cat II 37-39' site record stands
at
> less than 40 seconds. This 6500' altitude has quite an effect I
> guess.
>
> Randy
>
>
>
>
>
>
> Yahoo! Groups Links
>
[Non-text portions of this message have been removed]
Received on Mon Feb 12 2007 - 18:20:27 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET