Roy,
There is also a plan in the files section under Indoor Plans, named River
City Rocket, Science Olypiad Helicopter. Build a few. I'd love to hear some more
feedback.
If the thing is built with 6-7 lb wood it will come out right at 4 grams
which was my intent. Taking full advantage of the minimum weight to design a
model the average high school kid kid build without destroying in the process. I
have had all my kids cover them with tissue as it's more readily available and
less intimidating for kids and coaches. Typical flight times are about a minute
and a half with a best flight so far of 1:56 which is very competitive from what
I've seen so far.
The fast climb Art mentions is intentional as well. I have been coaching our
kids to aim for an open spot between the girders (as very few of these
competitions will take place in smooth ceiling venues) and the fast climb allows
the heli to get to that spot before it drifts off into a girder(Usually!).
Flying with the 3/16th motor turned out to be the set up that delivered the
highest times for us. On 1/8th they were coming down with a few hundred winds
left AND had lower duration flights. I've tried some .140 sized motors but still
did better with 3/16th.
Whirly Bill
________________________________
From: Roy White <roytigerwhite_at_yahoo.com>
To: Indoor_Construction_at_yahoogroups.com
Sent: Thu, February 17, 2011 10:34:36 PM
Subject: Re: [Indoor_Construction] Re: Science Olympiad Helicopter
THANK BILL Roy
________________________________
From: Bill Carney <wcarneyjx_at_bellsouth.net>
To: Indoor_Construction_at_yahoogroups.com
Sent: Thu, February 17, 2011 1:57:38 PM
Subject: Re: [Indoor_Construction] Re: Science Olympiad Helicopter
Roy,
There are pics posted here in the 2011 Science Olympiad Helicopters Folder.
It's the red and blue one and here's a video link:
http://www.youtube.com/watch?v=lqV_y-CSznM
Bill Carney
________________________________
From: Roy White <roytigerwhite_at_yahoo.com>
To: Indoor_Construction_at_yahoogroups.com
Sent: Thu, February 17, 2011 2:26:10 PM
Subject: Re: [Indoor_Construction] Re: Science Olympiad Helicopter
sure would like to see a picture of your helicopter. Roy White
________________________________
From: art <aholt11552_at_bellsouth.net>
To: Indoor_Construction_at_yahoogroups.com
Sent: Thu, February 17, 2011 12:01:00 PM
Subject: [Indoor_Construction] Re: Science Olympiad Helicopter
Hi, group...
This is my first posting.
I just finished my River City Rocket, a little on the heavy side, but that's
just me. My first timed flight, under a 13 foot ceiling, was 1:11 on about 375
turns.
The first posted plan showed a 40 cm motor stick and I had to run to the craft
store to get a stout enough log to keep it from bending under the specified 8"
loop of 3/16. When he revised the stick to 12" I just chopped 3.75 off one end
and then slimmed the stick down a bit. The wood in the kits will be more
carefully selected.
The great thing about the machine isn't so much the rocketlike climb, reflected
in the name, but the stability. It can be upset, flip inverted, an as long as it
has some rubber left it'll right itself and climb back up for more. Baffles me
how it does that.
Art.
Received on Fri Feb 18 2011 - 04:11:25 CET