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by himlynx
October 26th, 2012, 10:58 am
Forum: 2013 Build Events
Topic: Elastic Launched Glider C
Replies: 454
Views: 65885

Re: Elastic Launched Glider C

Ref Two questions though, what's the benifit of the under camber? I understand that the standard teaching about different leangths of travel on different side of a wing isn't entirely correct, but wouldn't an under camber make the top and bottom almost the same length and thus negate any effect of t...
by himlynx
September 23rd, 2012, 8:51 pm
Forum: 2013 Build Events
Topic: Elastic Launched Glider C
Replies: 454
Views: 65885

Re: Elastic Launched Glider C

this year's rules limit the wingspan to 30 cm. There is no fuselage or chord limit. There is a 10g max wt and the nose has to be larger than 13.7 mm. Lots more rules. My thought is that a multi wing model would not survive the launch. Also it will weigh a lot more and weight is a killer for this ev...
by himlynx
September 23rd, 2012, 9:58 am
Forum: 2013 Build Events
Topic: Elastic Launched Glider C
Replies: 454
Views: 65885

Re: Elastic Launched Glider C

I have read the old rules to which a link was given in the Helicopter - Future Aviation Events forum. I gather that the length and wingspan are both limited to 30 cm. Further, in the AMA website there was a reference to the wing chord being limited to 3 inches. Now I have two questions for the rule ...
by himlynx
August 26th, 2012, 7:13 am
Forum: Helicopters C
Topic: Glue
Replies: 23
Views: 4728

Re: Glue

For the stuff I build, just balsa (CAREFULLY selected) and very thin mylar film. The planes I'm referencing are called Ministicks (7 inch span, capable of flying 15 minutes or so) and EZBs (12 inch span, capable of flying 20 to 25 minutes). See http://www.indoorduration.com/ and dig around the site...
by himlynx
August 25th, 2012, 9:47 am
Forum: Helicopters C
Topic: Glue
Replies: 23
Views: 4728

Re: Glue

Last year I started the students out with a thin coat of diluted Ambroid and then a coat of slightly diluted. Put on with a brush. It did not add much weight. It was superbly strong. Time was killing us, so we switched to the mixed CA glue. It takes a while for new model builders to figure out how ...
by himlynx
August 25th, 2012, 9:43 am
Forum: Helicopters C
Topic: Glue
Replies: 23
Views: 4728

Re: Glue

PVA has its place, but if for outdoor or wet, you need the weather resistant formulations from hardware stores/big box home centers like titebond II or III. Note, I'm an indoor flyer where the whole plane might weight less than half a gram and .001 grams can be important, so I don't normally use CA...
by himlynx
August 24th, 2012, 10:15 am
Forum: Helicopters C
Topic: Glue
Replies: 23
Views: 4728

Re: Glue

I tried 3M's high strength 90. Too thick! save your money. I like 77. Consider this as spray paint. When you are done, invert the can and spray for 2 seconds. (OUTSIDE) I really like Titebond III for balsa "butt joints". It slow to set but extremely strong, so do not use any more than is ...
by himlynx
August 24th, 2012, 10:02 am
Forum: Helicopters C
Topic: Glue
Replies: 23
Views: 4728

Re: Glue

I find that CA dissolves Styrofoam. What is a good glue for Styrofoam ? Styrofoam safe CA, of course. Seriously, there is such stuff. Also known as odorless CA for those of us who've developed sensitivity to CA. Might be overkill for some projects, but it is fast. Oh, and what kind of CA are you us...
by himlynx
August 23rd, 2012, 11:02 am
Forum: Helicopters C
Topic: Glue
Replies: 23
Views: 4728

Re: Glue

Sounds like time for my annual lecture on glue. If you are having problems with glue on your fingers, especially super glue, YOU ARE USING TOO MUCH! If you must use from a bottle, make sure you use one of those with a VERY thin tip that lets out very small drops. Better still, use a precision micro...
by himlynx
August 23rd, 2012, 10:39 am
Forum: 2012 Build Events
Topic: Helicopter Egg Drop B [Trial]
Replies: 51
Views: 19523

Re: Helicopter Egg Drop B [Trial]

_HenryHscioly_ wrote:http://www.youtube.com/watch?v=AD9juUWL5iU#t=2m0s
:D
very cool, but i dont think it'll be any good for this event
haha


OK, now I've seen a one bladed helicopter.
by himlynx
August 15th, 2012, 8:48 pm
Forum: 2012 Build Events
Topic: Elastic Launch Glider C [Trial]
Replies: 11
Views: 12137

Re: Elastic Launch Glider C [Trial]

Elastic launch glider has been announced as a firm event for North Carolina 2013 B Division. :)
See http://www.sciencenc.com/events.php
by himlynx
July 22nd, 2012, 2:12 am
Forum: Towers B/C
Topic: Boomilever for 2013
Replies: 142
Views: 27027

Re: Boomilever for 2013

A little off topic, but I have to ask since my last attempt was a disaster. I plan on retrying to construct a balsa tube. I have the wood soaking now, and plan on wrapping it around a stainless steel handle and then fastening it with zip ties. How do you make sure that the tube is "straight&qu...
by himlynx
July 17th, 2012, 8:44 pm
Forum: 2012 Build Events
Topic: Helicopter Egg Drop B [Trial]
Replies: 51
Views: 19523

Re: Helicopter Egg Drop B [Trial]

I have two suggestions : 1. In order to get clearance from walls and similar obstructions, the helicopter could be dropped from the end of a rod,say, about 2 meters long. A hook at the end of the rod could engage a hook or a loop on top of the helicopter. The helicopter could be dropped by turning (...
by himlynx
July 17th, 2012, 8:35 pm
Forum: 2012 Build Events
Topic: Helicopter Egg Drop B [Trial]
Replies: 51
Views: 19523

Re: Helicopter Egg Drop B [Trial]

This event is new and the rules appear to be tentative. I have the following questions : 1. Is it OK to have damage to the helicopter when it lands ? 2. Any restriction on materials that can be used ? 3. Are we permitted to have more than one rotor, one above the other ? 4. Any restriction on number...
by himlynx
July 17th, 2012, 8:25 pm
Forum: 2012 Build Events
Topic: Helicopter Egg Drop B [Trial]
Replies: 51
Views: 19523

Re: Helicopter Egg Drop B [Trial]

Since there is no standard height from which the helicopter is dropped, these comparisons of time of descent are not meaningful

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