Search found 168 matches

by DoctaDave
December 8th, 2015, 2:40 pm
Forum: Wright Stuff C
Topic: Planform Shapes/Tips on Designing Own Planes
Replies: 4
Views: 1377

Re: Planform Shapes/Tips on Designing Own Planes

If you are having trouble making rectangular wings work then I would advise from trying anything more complicated. For other lighter models the gains from a reduction in induced and tip drag outweigh the increase in wing loading. But I think the loss in wing area from using an elliptical platform wo...
by DoctaDave
December 7th, 2015, 4:12 pm
Forum: Wright Stuff C
Topic: Wing Types
Replies: 7
Views: 1510

Re: Wing Types

Bernard, the wood we used was really light, flexible balsa wood so the camber was surprisingly consistent along the length and there was very little springback. The cardboard tube method also allowed us to put shims under the ends of the spars to mold in the wash-in and wash-out. jander14indoor, 6&...
by DoctaDave
December 7th, 2015, 10:02 am
Forum: Air Trajectory B/C
Topic: Targets
Replies: 4
Views: 1866

Re: Targets

Yes there are multiple targets. Again, please read the rules as it explicitly says this in them.
by DoctaDave
December 4th, 2015, 2:14 pm
Forum: 2016 Invitationals, Regionals, and States
Topic: Northern California 2016
Replies: 38
Views: 12159

Re: Northern California 2016

So who's going to the Churchill invite tomorrow?
by DoctaDave
November 30th, 2015, 6:56 pm
Forum: Bridge Building B/C
Topic: Proctoring
Replies: 33
Views: 7250

Re: Proctoring

As I will also be proctoring at an invite next week, I would like your opinions on interpreting the centering of the loading block. (I have already submitted an FAQ but incase it isn't answered in time, I would want to know how everyone else interprets the rules.) Section 3 e. "The bridge must ...
by DoctaDave
November 18th, 2015, 10:08 am
Forum: Bridge Building B/C
Topic: Bridge Building 2016
Replies: 130
Views: 40013

Re: Bridge Building 2016

Can you place the test support anywhere you'd like on the bearing zone. All pictures show it as close to the clear span area as possible, but I do not see any rule saying that it has to be right up against the edge. Im just thinking that if you put it a bit further away from the edge, it will help ...
by DoctaDave
November 10th, 2015, 11:00 am
Forum: Wright Stuff C
Topic: Rubber Length
Replies: 2
Views: 952

Re: Rubber Length

It won't be a very big difference. I think this year a reasonable hook to hook distance would be 10 - 15 inches.
by DoctaDave
October 23rd, 2015, 10:54 am
Forum: Bridge Building B/C
Topic: Bridge Designs
Replies: 58
Views: 15358

Re: Bridge Designs

I've used 25 gauge syringe tips and they clogged too often with thin CA. I used a lighter to burn off excess CA but any pressure within the syringe would cause CA to shoot everywhere. The syringe also isn't very smooth and if the plunger is ever stuck a large amount of CA will be used. I think it is...
by DoctaDave
October 22nd, 2015, 1:01 pm
Forum: Bridge Building B/C
Topic: Bridge Designs
Replies: 58
Views: 15358

Re: Bridge Designs

I believe duco cement is the lightest glue that is still practical for bridge building. It can be thinned with acetone and is still relatively strong and unlike CA glues, duco cement actually dries and loses mass over time where CA polymerizes and maintains the same mass in solid and liquid form. Du...
by DoctaDave
October 22nd, 2015, 9:46 am
Forum: 2016 Invitationals, Regionals, and States
Topic: Northern California 2016
Replies: 38
Views: 12159

Re: Northern California 2016

I'm from Mira loma!

I hope you enjoy our tournament :)

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