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Home✈️Aircraft🚁Helicoptere-Electric General Discussion › The official RR PiccoZ Mod Thread!!
09-15-2006 03:09 AM  13 years ago
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R0XoRiZoR

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Austin, Texas - US

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The official RR PiccoZ Mod Thread!!
Thought i would start a RR picco mod thread :-D

Help me make this popular, and keep it going!

Below are my mods. Removed main gear cover. Removed all tail stickers. Removed 2mm from tail blades (tip) and 2mm from sides (see pic #2).

I had to split this one apart to fix tail wires, and attempted to glue it together. I can't get a light enough glue, with enough stickyness to hold it together... that is without melting the foam. So i have a temporary piece of clear tape.

Added a rather large piece of tape to the tail... found this to help in its "weather vane"-ing effect, that helps keep itself straight. Note the gap in the corner to allow airflow from the tail rotor. I plan on removing more items + some foam, to make this thing fly longer... but right now its pretty nice. I get 8 min flights no matter how i fly now, and it flies really responsive. I posted earlier i had to tame it down a bit, as it became to controllable.

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09-16-2006 12:55 AM  13 years ago
Kramer

rrApprentice

LaPorte,In.

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shoe goo works on epp foamhttp://www.facebook.com/groups/1029857 http://northern-indiana-modelers-association.synthasite.com/
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09-16-2006 04:21 AM  13 years ago
cudaboy_71

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sacramento, ca, u.s.

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i did a bell 222/airwolf mod today. i left the stupid USB cable for my camera at work i may drive in tomorrow to get it so i can post some pix. it flies great.if it ain't broke, break it.
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09-16-2006 04:29 AM  13 years ago
Flyfalcons

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Bonney Lake, WA

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Here's mine (just got it today) with a V-Blade mod.

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09-17-2006 10:16 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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Fundamental Flaw?
Today i received 3 more picco's... 2 worked. 1 was unflyable. Another topic for another time perhaps.. but now i wanted to talk about a problem with adding weight to the nose for forward flight.

This heli is a gyro-copter. Meaning, pitch and roll, auto correct itself. How does it do that? Here's how.

When the heli starts to tip, say, roll-right, the weights on the gyro bar remain at 0 degree's roll for a few seconds longer than the blades+heli. This (using the connecting rods on the main blades) change either the angle of the main blades, or the pitch per blade. Let me explain that part.

See Image #1

With the bird making a hard nose dive, the gyro attempts to compensate. In this photo, it is actually changing the pitch of the forward blade to equal drastically more than that of the aft blade. This would increase lift on the front of the heli, and decrease it on the rear. Thus... correcting any forward movement (theoritically it would make the heli more lible to decrease altitude). Imagine a canoe on the river. The boat gets pushed to the left by wind, and you lean to the right to counteract. The boat stays upright.

If a weight were applied to the nose of the heli, this would create 2 possible area's for battery life draining faster than normal.

1. The heli has to carry more weight. This would make the heli work harder to accomplish the same task. Depending on the weight of the balast used, you can see a dramatic difference in flight times. with my full sized tack method, I lose around 30%.

2. The heli is creating more lift on the front of the heli, and less on the rear of the heli. This would mostly force the heli to work harder to stay in the same altitude, as one position of the blade has far less pitch than the other. The other blade would have far greater pitch, putting a larger load on the motor.

Finding this... i would suggest finding a way to alter the rotor wash, vs the weight distribution. I plan on taking this on myself.

Typically, relocating weight to the front of the bird would promote forward movement... however... being a "gyro" this wouldn't be a very good solution.

Why does my bird move forward with a forward weight then?

Easy. Although the heli blades have some sore of "gyro" action, it is in-efficient. The extra forward movement is just a by-product of the physics of this type of gyro...

Take a fresh new picco out of the box. Immediately put a large.. large weight on the nose. The heli will move forward, but not at the speed of a similar picco that has had 20-30 flights.

This would also explain the stability increase when adding weight to the nose... the tail is getting more rotor wash than the front, and using the tail stickers it kind of creates a "vane-ing" effect. in conjunction with further difficulty for the tail motor to do its job with the extra weight, and vane-ing, the main rotors tend to create some interesting turbulance effects... further hendoring rotational corrections...

More to come...

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09-17-2006 10:25 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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Thinking about it now.. im thinking of using a piece of wire to inturupt the path of the forward blade. The curved down edge of the blade would hit the wire... altering the pitch. This pitch would be less, and it would increase the aft pitch. Hopefully producing forward flight. May be tricky, as by the time the trailing edge of the blade touches the wire, the blade would have already passed the forward position. This may make my heli try to fly forward in a diagonal direction. Also keeping the drag of that blade that comes in contact with my wire, may be even more in-efficient than just adding weight to the extreme tip of the nose, due to friction.

I'll keep everyone posted.
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09-18-2006 12:02 AM  13 years ago
Flyfalcons

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Bonney Lake, WA

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It would be easier to just wrap a piece of tape around the nose to "catch" the downward air from the rotor disk. I tried that and while a little ugly if using opaque tape, it does allow the heli to fly a little quicker in forward flight. I usually just fly it around without weights or tape though._______________________

Ryan Winslow
X-Spec, EVO 50
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09-18-2006 03:04 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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The tape would have the same affect... The rotor was will need to be directed or the blade pitch changed...

The tape at the front will bring down the front of the heli... the same as a weight.

Still digging for an answer.. ill keep this post updated
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09-18-2006 03:11 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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Blades...
One of my picco's that arrived this weekend was a dud.

Initially it will spin up, and hum that familiar tune (almost sounds like its going to break apart), but will rattle a bit and drop to 1/3 the speed. Won't even lift itself off the ground. I removed the tail prop, thinking its losing to much amperage... but to no avail... I'm still working on this one... but...

One of the others was the same... and i adjusted the blade tracking and it fixed it. It fixed it so well, that it actually ran better than all of my other ones. It would hit a harmonic tone that i hadn't heard before, and flew like a bell setup. Very smooth... very quick... nice tail control.

So i checked the remaining 2 (out of 4), and did the same. Now i have 3 picco's that fly like never before...

So i would suggest you guys balance and track your blades. These little motors can't hack spinning unbalanced and out of track blades at their most efficient speeds..

I saw a huge... huge improvement over the existing battery life. Amazing how something as simple as tracking the blades, can make such a difference.
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09-18-2006 05:42 PM  13 years ago
Flyfalcons

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Bonney Lake, WA

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How do you adjust the blade tracking on these? I tried twisting the blades a little but it didn't do much. Mine are a little out of track._______________________

Ryan Winslow
X-Spec, EVO 50
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09-18-2006 07:27 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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The top "flybar" is what controls the pitch of each blade, using small changes...

Check the "flybar" tracking first. If it is off just a little bit, it will throw the tracking for the main blades off further.

I adjusted my flybar using a heatshrink gun, and alittle patience. Be carefull not to melt the main blades, as they are very thin.

Alittle heat, adjust, cool, shoudl stay right where you put it.

Rinse, and repeat.
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09-18-2006 07:31 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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Dont forget to balace your blades also... unbalanced blades will give you traking issues also.

You will have to disassemble the head, to do so. I just balaced them using a sewing needle through the pivot shaft hole of the "flybar" between 2 glasses. Main blades i used a tip of a pencil.
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09-18-2006 11:17 PM  13 years ago
heli_madken

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Liverpool, England

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Cudaboy - thats insane, absolutely fantastic well done, had me smiling all night cant wait to get mine
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09-19-2006 05:06 AM  13 years ago
acmeworksfab

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medford, oregon

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well i can't say that i would trade my trex for one. but i have to admit, it is kind of fun to fly. bought one tonight (toys r us) wish i had bought two more.
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09-19-2006 05:10 AM  13 years ago
cudaboy_71

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sacramento, ca, u.s.

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heli_madken: thanks. my 1yr old loves it...but, i have to hum the song (not really, that's just for me )if it ain't broke, break it.
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09-21-2006 02:01 PM  13 years ago
Flyfalcons

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Bonney Lake, WA

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Well I tracked my blades and now my Picco Z seems a lot happier. I don't time the flights but I think I'm using a little less power to hover, and it sounds much better than it did before. These little toy helis are a real blast._______________________

Ryan Winslow
X-Spec, EVO 50
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09-22-2006 04:53 AM  13 years ago
jtspin

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Reno, NV

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How'd you track your blades?
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10-03-2006 01:46 AM  13 years ago
specs

rrNovice

worcester,ma

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Tail rotor
Tail rotor kaput

Hi folks,
I"m an amateur at this, but got one of these Picco Z's. Loved it for a day and 1/2, then the tail rotor just stopped in mid-flight, and that was that. I saw that someone else on the board had the same problem. I tried to oil it, and it's clean - no hair or dust or anything wrapped around it. Any ideas from you experts out there??
Thanks~
SPecs
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10-03-2006 04:00 AM  13 years ago
TurboRacer

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FL

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Here's what I tried:

Took a broken aero ace and used it's tail to make canards.

Canards stuck on by using a sharp blade at a 45° or so angle pretty much down the canopy - from just under the back of the windshield to the tip of the nose.. So you can slide the canards foward or back. They stay in well & add almost no weight..





I tried it today and it made it pretty fast.. I have to outdoor testing or a bigger indoor test because it was very quick - yet seemed controllable.

I'll report back tomorrow.

I also want to try putting them on the boom right under the tip of the blades..

Good stuff
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10-03-2006 01:41 PM  13 years ago
R0XoRiZoR

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Austin, Texas - US

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You may have to crack it open... but check the tail motor wires, where they connect to the controller board.

Mine had vibrated loose, and had to re-solder them in place.
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