Hip Pocket Builders' Forum

Indoor Free Flight Forum => Stick models and sport designs => Topic started by: RandyW on July 12, 2017, 01:23:50 AM



Title: Flutter Copter
Post by: RandyW on July 12, 2017, 01:23:50 AM
I found this plan and downloaded it from Outerzone.  The full size drawing will print on 8-1/2 x 11" paper. I built the two seen here in an afternoon.  The construction article stated the helicopter would fly without adjustment of any kind.  In this era of advertising hype and broken promises I was shocked to discover the designer was quite correct in his statement!  Did the test flights in the living room then off to the field.  While the chopper is not a good choice for flying in windy conditions, it consistently tops 2 minutes in the morning calm with only a loop of 1/8" tan II rubber. I will confess to the fact the motor was lubed and winder wound. The only change I made during construction was to add a thread and toothpick king-post to the motor stick, mostly because I didn't have any rock hard stock suitable for the application.

Watching this bird fly takes me back to the days of my miss-spent youth, and the Jim Walker Ceiling Walkers I used to buy for a quarter at the local variety store.


Title: Re: Flutter Copter
Post by: TimWescott on July 12, 2017, 04:27:10 PM
Oh, timely.  I have a modeling friend who got run over by a truck and is currently in the hospital.  I was thinking that you might be able to slip something like that by the nurses, particularly if you're a grandmother.  As soon as she gets to the point where her energy is back but she's still tied to the bed she'll need something like that.


Title: Re: Flutter Copter
Post by: kittyfritters on July 12, 2017, 07:39:07 PM
This copter is an amazing indoor flier.  The last Don Martin Cup rubber powered helicopter contest was won using one of these.

Howard


Title: Re: Flutter Copter
Post by: studster on September 05, 2017, 03:22:42 PM
This looks like a great afternoon project! This project has moved to the top of the list of distractions from the things I should be doing. Thank you for sharing. I'll keep you posted on the progress.

~john


Title: Re: Flutter Copter
Post by: studster on September 12, 2017, 11:58:31 AM
After reading the post about the Fluttercopter I went home and got to work. I built the Fluttercopter exactly as the plans prescribed. It flew pretty good in my living room, but seemed as though it needed more power. I took it outside and stretch wound the rubber. When I was attaching the rubber to the copter things went south and I broke the stick and a propeller (see photo).

Figuring it needed more oomph, I rebuilt the propellers out of birch coffee stirrers I had on hand - I used 1/16" balsa on the tips of the props. I switched out the 1/8" rubber for 3/16" rubber as well. I put it in the car and drove to the park. When I got to the park I found one of the balsa tips on the propeller was completely missing. Not sure how that happened. I still decided to take it for a spin. The Fluttercopter flew wonderfully (see photo). I was getting fifteen second flights without stretch winding - and I probably could have wound it more but I didn't wish to press my luck.

Thanks for the inspiration on the fun afternoon project!
~john


Title: Re: Flutter Copter
Post by: Art356A on September 12, 2017, 09:53:22 PM
Bill Carney designed a good one, a little more work than this, though.

Here's the original....

http://aerostories.free.fr/precurseurs/penaud/page2.html

art


Title: Re: Flutter Copter
Post by: hastf1b on September 13, 2017, 03:19:40 AM
Living room Copter.

Heinz