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Archive for August, 2012
Posted by RicksterRC | Aug 30, 2012 @ 03:09 PM | 2,651 Views
In my quest to figure out why paddles make such an improvement in flight performance, I did an experiment.

The results were quite positive.
Ten minutes, a drinking straw and a twist tie.

My theory is that the paddles destailize the self righting aspect of the 45 degree flybar.


I had an idea that reducing the effectiveness of the self stabilizing/self righting might accomplish the same thing without adding extra rotating mass and air drag.

So I set out to limit the range of the flybar's action.

I used a piece of plastic drinking straw (exactly 0.250" worked great) and a twist tie to hold things in place.

It worked remarkably well.
Because I'm limiting the throw of the flybar (not increasing it like I think the paddles do), I think it acts kind of like it has expo. Stability in hover is maintained, but the response to stick input is dramatically increased - and does not get reduced by the self righting response.

As shown in the pics below, the flight characteristics before the mod are such that after a second with full forward stick, the copter seems to level off and slow down. When the stick is released, the copter tips back by itself and comes to a stop.
After the mod, the angle of attack stays constant and the copter continues to increases speed considerably. I had to ease back on the stick! When the stick is released, the copter didn't do it's rock back thing. I had to actually stop it...Continue Reading
Posted by RicksterRC | Aug 20, 2012 @ 11:51 PM | 2,687 Views
Here's my fleet.

Vintage original orange/black coRter.
Red/White -
- reinforced flybar (a piece of tail boom wrapped with strong thread and CA, painted black with a sharpie).
- LED canopy lighting as in my blog post: https://www.rcgroups.com/forums/show...75&postcount=1
Blue/White -
- nav lights as in my blog post: https://www.rcgroups.com/forums/show...78&postcount=1

All 5 have Extreme SoloPro delrin main gears and SP 260 swash.
The R/W now has a fisheye swash (as does the yellow, of course).
Posted by RicksterRC | Aug 20, 2012 @ 11:08 PM | 2,818 Views
I found some more cool LEDs.
These are 10mm (fairly big). They are RGB (red/green/blue) all inside one lens with a chip that fades from color to color.
First it does the primaries, then it fades the rainbow, then repeats.
Very cool.

Put it inside one of the white canopies (red/white or blue/white) and the effect is mesmerizing.

They run directly off 4.2V battery.
20 for $7.95 http://www.ebay.com/itm/140804344168...84.m1497.l2649

I scraped some of the solder mask off the ground plane just to the left of the red battery lead. On my board, it was where the date is silkscreened.
Use a meter to make sure you have 4.2V across the red wire to the scraped spot.
Remove the battery.
Tin the bare copper. Bend the LED leads at right angles close to the LED.
Cut the longer one a little longer so you can keep track of it.
The longer lead goes to the red wire pad, the shorter to the scraped spot.
Tin the leads, then solder to the pads.

I couldn't get a good video of it (for some reason the cameras didn't like the brightness of the led and washed it out to white).

MOV007 (1 min 2 sec)