Jeff
I try not to worry about predicted flight times except that if a change predicts more time at an acceptable SSM then I feel like it's a possible good thing. This may sound wishy washy but I think it's better than just taking a shot in the dark at a design change. My F1M had a substantial increase in performance after making some changes suggested by the program. My A6 and Wright Stuff designs both looked good in the program and have performed well in real life. The A6 in particular was pretty different from what most people have used.
One of the problems I've found is that the program shows better times as you lower the stab until you get to ridiculous extremes. I'm still using seat-of-the-pants to set the wing and stab locations.
Neal - I built a couple of T-tail F1L's back around 2000 when I was first getting into indoor. Both flew well but I was lacking a lot of other skill at the time so they weren't competitive. Bernie Hunt said they would probably have a better recovery from a tail slide which seems reasonable.
----- Original Message -----
From: Jeff
To: Indoor_Construction_at_yahoogroups.com
Sent: Monday, September 29, 2008 10:55 PM
Subject: [Indoor_Construction] Re: Wright Stuff designs for the this year
Another question about Bernie's spreadsheet. Did he do an article
anywhere about application of the info in the sheet.
As you said, looks like the data was developed around F1D planes. I
wonder how well it really fits heavier planes like SO. Does it
provide directionally correct info, but not really optimum? Or is it
misleading because of some basic underlying assumptions.
As is, it at least gives what seem to be fairly correct cg and static
margin info.
Jeff Anderson
Livonia, MI
--- In Indoor_Construction_at_yahoogroups.com, "Bill Gowen" <b.gowen_at_...>
wrote:
>
> Bernie Hunt is a well known and accomplished modeler in England. I
think he has been out of indoor flying for several years due to other
interests but perhaps some of our English friends can shed more light
on that.
>
> The below is my impression which may not be 100% accurate:
> Over a period of several years he developed an Excel design program
for indoor models. It started out being for 65cm F1D's. Bernie sent me
the 2000 version of the program which includes data for 65 cm F1D's,
55cm F1D's and a few other models. I've been using this program for
several years to design all kinds of indoor duration models.
>
> I've sent this program to a few people who have asked for it but
I've never posted it because I never asked permission to do that. If
someone knows how to get in touch with Bernie to secure that
permission I'd be happy to post it publicly.
>
> ----- Original Message -----
> From: rszanti
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Monday, September 29, 2008 9:52 AM
> Subject: [Indoor_Construction] Re: Wright Stuff designs for the
this year
>
>
>
>
> For those of us that are highly curious, what is Bernies' Program ?
>
> Richard
>
>
>
>
>
>
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Received on Mon Sep 29 2008 - 20:21:28 CEST