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by BalsaFerret
June 2nd, 2019, 3:51 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

1st: Albequerque HS with a 5:09 2nd: Bayard Rustin HS with a 4:25 3rd: Northville HS with a 3:50 From what I observed ^ I was 4th place with a 3:39 no bonus for time. During practice on Friday, I got 4:02 twice, Acton Boxborough can attest. But nonetheless it was great flying here and really amazin...
by BalsaFerret
May 21st, 2019, 8:39 am
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

Balsa, We use the Bernie Hunt NP/Design spreadsheet. Fern Rash also has published a good one. Both are available in the Yahoo Group “Indoor_Construction” in the Files section. Bernie’s sheet doesn’t calculate CG perfectly for heavy airplanes like we use for SO but we “trick” the spreadsheet by ente...
by BalsaFerret
May 19th, 2019, 8:38 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

Balsa, We generally start testing by selecting a conservative CG based upon the neutral point and a slightly excessive decalage angle (difference between the wing and stabilizer incidence angles). We fly this setup, maybe slightly reducing wing incidence if stalling, with a variety of propellers (u...
by BalsaFerret
May 18th, 2019, 5:12 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

Hey guys, although nats is not far away and people are finalizing their flights, I still don't feel like I've fully grasped the details and want to ask some (basic) questions: 1) How do you know when to adjust incidence/moving cg/testing different torques to maximize times - is it just through testi...
by BalsaFerret
May 18th, 2019, 3:32 pm
Forum: 2019 Nationals
Topic: 2019 National Tournament: Cornell University
Replies: 476
Views: 68245

Re: 2019 National Tournament: Cornell University

Isn't it also screening on Thursday night? Not sure when but that's when I'm planning to see it True, although I'm pretty sure Friday would gather more people bc I think most teams are arriving late Thursday or later But now that these two conflict I'm just disappointed You're in luck! We actually ...
by BalsaFerret
May 17th, 2019, 2:50 pm
Forum: 2019 Nationals
Topic: 2019 National Tournament: Cornell University
Replies: 476
Views: 68245

Re: 2019 National Tournament: Cornell University

After much discussion with Cornell, we were able to secure the Ramin Room for additional time on Friday! The practice times for Flying Events are now as follows: Friday - 2:00 pm - 5:00 pm (NOTE: HVAC SYSTEM MAY BE RUNNING ON FRIDAY) Saturday - 6:00 am - 8:00 am and during downtime throughout the d...
by BalsaFerret
May 17th, 2019, 1:58 pm
Forum: 2019 Nationals
Topic: 2019 National Tournament: Cornell University
Replies: 476
Views: 68245

Re: 2019 National Tournament: Cornell University

Can you Nats2019 give anything more regarding flight tests for DivC Wright Stuff and DivB ELG? Many teams have asked if there are Friday times due to impound and event issues Saturday morning. After much discussion with Cornell, we were able to secure the Ramin Room for additional time on Friday! T...
by BalsaFerret
April 24th, 2019, 8:52 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

As Jeff noted, a consistent drift in one direction is likely due to room drift. Without such, the plane does not know one end of the room form another, so the flight path may be erratic, but not moving the circles in one direction. It is important, if at all possible, to study other flights at a co...
by BalsaFerret
April 23rd, 2019, 7:41 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

The overall mass of the air in your flying space is moving. Even with the air system off this occurs. Typically there is some sort of rotating pattern due to differential external heating (sun on one wall for example). This causes the air to rise on that wall, descend on cold wall. In between at to...
by BalsaFerret
April 23rd, 2019, 5:48 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 55509

Re: Wright Stuff C

I'm not sure if this has been addressed already, but what exactly causes the plane to "drift" towards one direction, as in the entire flight path shifting? I have a tight flying space and when I'm trimming, the circle keeps on drifting to the left where there are obstructions, often messing up the f...

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