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Feb 27, 2012, 10:05 AM
Registered User
Vegas_flyer's Avatar
Quote:
Originally Posted by davereap
where did you have the COG on that one, it rolls much better and loops much tighter than mine do
Good question.......
I've been flying it too long to remember. I know I started out around 25% and kept pushing the battery back and adjusting the downthrust for my liking. I'll check the actual CG when I get home tonight.


Chris
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Feb 27, 2012, 06:28 PM
Innovator
danford1's Avatar

Here is my 21" Nut Ball.


I just finished a 21" Nut Ball. It is 8.6 ounces AUW.
I used an Emax CF2822 motor, Plush 12A ESC, Orange receiver, APC 9x3.8 prop, 2S 800mah battery. CG balanced at 27% from motor mount. 5.67" or 144 mm.
I haven't tried flying it yet (dark, cold, windy winter night).
Tomorrow I will be going to an indoor soccer arena and maiden it there.
It has more power than needed as it wants to fly out of my hand when pointed straight and full throttle is applied.
Yes, I know, go easy on the power for maiden flights ... I will ... :-)

Here are a few pictures of it. Wish me luck!
Danford1
Last edited by danford1; Feb 29, 2012 at 10:28 AM.
Feb 27, 2012, 08:26 PM
If it flies, its cool
bondohead's Avatar
hey gold! its been some time since ive been here on rcg.
ive searched the thread for the best diameter for a pz gear floater/trainer. cant seam to get a clear idea. 9"-11"?
going to build a first plane for my nabors 10yr old son.
a little direction please.
thanks in advance!
Feb 27, 2012, 08:53 PM
chuck
good luck, danforth. if u want a more floaty nb , we have went all the way to 30" w/ that motor 2's 1000 and a 11x3.8 .

chuck.
Feb 28, 2012, 09:05 AM
Innovator
danford1's Avatar
I started reading this thread from the beginning. I got to page 30, I have a very long read ahead of me...
I got far enough to know I wanted to build one.
The motor is something I had on hand. When you guys say that motor, do you mean the exact same one?
If the 30" is better, then why hasn't the first page of the thread been updated?
Just kidding ...
Danford1
Feb 28, 2012, 09:17 AM
chuck
power to weight wise that motor will work on ~ 20-30 " 1 being a hot rod the other being light and floaty.

chuck.
Feb 28, 2012, 01:35 PM
Innovator
danford1's Avatar
I maiden the Nut ball today. Wow! It flew great !!!
Nice and slow and still controllable. I was indoors and couldn't go fast or do any tricks, just left turn flying.
It has way more power than it needs. I was flying at maybe 1/3 throttle. I can't wait for better weather so I can go outside and see what it will do.
Right now, I'm very, very happy :-)
Perhaps a 30" one will be built later this winter.

Thanks.
Danford1
Feb 29, 2012, 01:32 AM
Registered User
Vegas_flyer's Avatar
Quote:
Originally Posted by davereap
where did you have the COG on that one, it rolls much better and loops much tighter than mine do
I just checked the CG, it is at 5" on the 20" nutball. It might shift +/- depending on exactly where I place it.

A couple of things:
Servos located forward to place the battery at CG, mass is located towards center of plane, should help rotation responce (never understood why the stock design has the rearward servo placement).
Rudder was trimmed to allow more up elevator.
When spinning downwards, I add down elevator to flatten the rotation.
My wing is bent to a slight under-chamber via plastic strip glued on the bottom of the fuselage.

Landing gear is a simple custom made setup, see if you can figure out how it works.........
Feb 29, 2012, 05:37 AM
Registered User
davereap's Avatar
25% as standard... but my builds have never rolled like that.. and the loops are always larger... perhaps its down to the throws...
Although most of mine were KF'd and that will usually stabilise things more than with a flat plate build..

This is the only model I have that does all a nutball will do but will roll better and it goes upright or inverted just as easy..
Its main inspiration as you can tell from the shape was the nuball
.
Heart shape 21" long W wing KFm4 ..general flying short vid (3 min 25 sec)


Bondohead
the build is here... https://www.rcgroups.com/forums/show....php?t=1504784
the video model is the second smaller lighter build I did and is just right..
With all its angles/dihedral its very stable like our nutballs, its stable enough for beginers...
but it rolls like a flat aileron type model.. there are a lot more videos on the thread
Last edited by davereap; Mar 02, 2012 at 02:37 AM.
Mar 01, 2012, 07:11 PM
If it flies, its cool
bondohead's Avatar
davereap- looks good rolls like a light flight bug. ben thinking about something like that with lights for night flying at SEF.
please post some details . (if its all rite with Gold)
also anny takers on advise for my bud's kid on a trainer size pz equipted NB
Mar 02, 2012, 08:20 AM
Registered User
Quote:
Originally Posted by bondohead
davereap- looks good rolls like a light flight bug. ben thinking about something like that with lights for night flying at SEF.
please post some details . (if its all rite with Gold)
also anny takers on advise for my bud's kid on a trainer size pz equipted NB
Bondo
I use a PZ AR6400 (so that I can use Brushless) on a 14" NB with Micron RC 3amp esc
.
It is powered by a cheapo HK 5g motor and a 240 mah 7.4v cell.I intend to upgrade the motor to a to an Ap05 for a bit of extra zip.


I also have a 17" and 20" (currently resting 30' up a tree in full view of my workshop ....................these are both using a BW motor.

Some of the guys on this thread claim that the bigger the NB, the more floaty it is and I would agree with this, especially for a young lad.

Hope this is of some help

Graham
Mar 02, 2012, 08:44 AM
PLANES!
my ar6400 nutball just died =( RIP oh well just finished a um p-26
Mar 02, 2012, 08:55 AM
PLANES!
my 11in ar6400 nutball just died=( RIP oh well i am building a new plane (2 for that matter).
Mar 03, 2012, 09:48 PM
If it flies, its cool
bondohead's Avatar
Quote:
Originally Posted by geedee
Bondo
I use a PZ AR6400 (so that I can use Brushless) on a 14" NB with Micron RC 3amp esc
.
It is powered by a cheapo HK 5g motor and a 240 mah 7.4v cell.I intend to upgrade the motor to a to an Ap05 for a bit of extra zip.


I also have a 17" and 20" (currently resting 30' up a tree in full view of my workshop ....................these are both using a BW motor.

Some of the guys on this thread claim that the bigger the NB, the more floaty it is and I would agree with this, especially for a young lad.

Hope this is of some help

Graham
thanks for the reply. im going to use the brushed pz stuff. the future pilot was over at our house tonight and excited about the plane
Mar 04, 2012, 05:13 AM
Registered User

Nb


(thanks for the reply. im going to use the brushed pz stuff. the future pilot was over at our house tonight and excited about the plane )

Good luck,keep us posted.


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