Kens CAD Models Nutball Kit - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
This thread is privately moderated by dz1sfb, who may elect to delete unwanted replies.
Nov 24, 2013, 09:35 PM
Ken's CAD Models
dz1sfb's Avatar
New Product

Kens CAD Models Nutball Kit


Was recently approached by Goldguy with the opportunity to add the Nutball to manufacturing repertoire. So after several test cuts and experiments for packaging here it is.

This entry will also act as a build guide for those who need it.

Web page to order kits is http://www.kenscadmodels.com/nutball...oor-flyer.html

Ken

Last edited by dz1sfb; Feb 07, 2014 at 04:31 PM.
Sign up now
to remove ads between posts
Nov 24, 2013, 09:36 PM
Ken's CAD Models
dz1sfb's Avatar
Painting, Equipment Installation and Setup

1. Painting, I would suggest now as the time to do it. It is a lot easier to paint without all the equipment in the way and does not effect electronics installation.
a) The easiest paint to use on foam is craft acrylic paint. Easy clean up with water and once it is dry is very resistant to moisture unless you have painted over tapes.
b) In an effort to keep the paint light I usually only paint the "show" side. This gives good contrast in the air. Also a scheme that uses the natural color of the foam means less paint as well.

2. Servo and Pushrod Installation
a) Prepare servos by hooking up all your electronics so that your servos can be centered. This may also be done with a servo tester. Once centered install the longest single arm control so that it is as close as possible to 90 degrees to the servo case. Then prepare the second servo similarly, but with the horn in the opposite direction. When held next to each other with the horns pointing away from each other they should resemble a mirror image of each other.
b) Now install the supplied pushrod into the servo horn with the Z bend going into the top of the horn. Do this to both servos.
c) The horn end of the servo goes toward the rear of the model. Start by feeding the pushrod through the foam guide, and then the servo wire down through the hole, followed by the servo body down to the mounting tabs. Now install the other servo in like manner.
d) Note: Do not glue the servos in place at this time. Low temp hot glue, Foam Tac, or Foam Cure, or your favorite polystyrene foam safe adhesive my be used.Also be sure the servo holes are fitted for the servos you are using.

3. Motor, Landing Gear, and Wheel Installation
a) The landing gear installs between the motor mount and the firewall. I have a pattern for the recommended motor and the wire supplied in the kit is long enough to make it. If you are using other motors such as a Suppo 1504 or 1510, then their is enough wire to accommodate these as well. I just have not made a pattern for them.
b) Using the mounting screws that come with the servos, install the mount and landing gear to the firewall.
c) Now you can install the motor pointing the leads to the left or the right. We will install the esc on one side of the fuselage and the rx on the other side. I like to solder the motor direct to the esc, but most folks will use bullet connectors. 2mm bullets are plenty here. It is also much easier to change the motor rotation if it happens to be spinning the wrong way with bullet connectors. The only penalty is weight from extra wire and the bullets.
d) Use a dab of hot glue over the end of the landing gear axles to secure the wheels in place. This works very well by pushing the nozzle of the glue gun over the axle and squirting a tube of glue over the wire.

4. ESC, Rx, and Battery Installation
a) This is somewhat a matter of personal preference, but this is how I have done it.
b) I put a hole through the fuselage to allow the wires to go through without having to pass under the fuselage risking exposure and damage. The location of the hole is strategically placed to use up some of the extra servo and esc wire. Layout your components with the wires and plugs connected to help determine this position.
c) A dab of hot glue is enough to hold the esc and rx in place. Some may elect to use velcro.
d) The battery is held in place with velcro and there is a simple preparation to make you self adhesive velcro strip hold securely to the foam. Lay down hot glue where your velcro strip will go and smooth out flat with a plastic card. This needs to be done rather quickly as the hot glue will begin to set. Make sure you get the entire area where the velcro will sit. Once cool you can install the velcro. The hot glue provides a smooth and secure surface preparation that will keep that material from pulling loose.

5. Pushrod Termination
a) Turn on transmitter and receiver allowing the system to initialize.
b) Adjust trims (or sub trims if you have them) so that the servo horns are 90 degrees to the centerline of the aircraft.
c) Using a piece flat stock tape to the rudder to hold straight, then bend the pushrod so that you have an L bend lining up with the outer most hole in the rudder control horn. Now you can install the pushrod through the horn and retain with DuBro # 849 EZ Connector or similar product. Then trim the excess wire.
d) Repeat operation 5c for the elevator.
e) You will notice there is no adjustment in the pushrods. All adjustment is accomplished through the transmitter trims. This makes for a very light weight setup and low cost as well. There is more than enough travel for this plane.

6. Control Surface Settings
a) For initial flights set rudder to straight ahead. Low rates at 3/16" travel, left and right. High rates at 3/8".
b) Elevator should be set for similar throws. Neutral should be 1/4" up.
c) Center of gravity is 25% of centerline chord, which is 3.75" from front of wing at centerline on a 15" Nutball.
d) Now glue the servos in with a small dab of hot glue underneath the mounting tabs.


Ken
Last edited by dz1sfb; Feb 18, 2014 at 05:08 PM.
Feb 17, 2014, 06:01 PM
Ken's CAD Models
dz1sfb's Avatar
Build Guide is completed.

Ken
Latest blog entry: Mini H Quad Project
Feb 18, 2014, 04:48 PM
flyin' fool
goldguy's Avatar
Well done Ken.
Mar 18, 2014, 04:36 PM
Ken's CAD Models
dz1sfb's Avatar

Recommended Gear


Forgot to put this information in place.

Motor -
Turnigy or HXT 10g 1811 2000 Kv

Propeller -
GWS 7 x 3.5

Electronic Speed Control -
Any 6A brushless esc is plenty to do the job

Servos -
Cutouts in foam fit 3.6 - 4.3g, but you can use up to 5g servos.

Battery -
Most any 300 - 350 mAh 2s battery

Reciever -
For Spektrum users the Hobby King 410 is the best choice for cost and quality. You can use the 610 but that is just extra weight on this model. Lighter is better.

Ken
Latest blog entry: Mini H Quad Project
Mar 22, 2014, 10:33 PM
Ken's CAD Models
dz1sfb's Avatar
Recommended Thrust Angles

Down Thrust - 5 Degrees - Built into the kit

Right Thrust - 3 Degrees - Needs to be sanded in

Ken
Latest blog entry: Mini H Quad Project
Jul 18, 2014, 06:58 PM
Ken's CAD Models
dz1sfb's Avatar
Be sure to visit and respond to this thread https://www.rcgroups.com/forums/show...0#post28949353

It is imperative,
Ken
Latest blog entry: Mini H Quad Project
Nov 09, 2016, 01:22 PM
Registered User
You mentioned a pattern for the landing gear wire. Could you share it?

thanks
Nov 10, 2016, 07:03 AM
Ken's CAD Models
dz1sfb's Avatar
Quote:
Originally Posted by Lostcity
You mentioned a pattern for the landing gear wire. Could you share it?

thanks
It is dependent on your specific motor. Here is the concept that I've used and provided wire in the kit for. I can provide a full scale printable of this if you like.

Ken

Latest blog entry: Mini H Quad Project
Nov 12, 2016, 04:53 AM
Registered User
I'm using the turnigy 1811/2000kv so looks about right thanks

Sent from my SM-T230NU using Tapatalk
Nov 13, 2016, 06:35 AM
Ken's CAD Models
dz1sfb's Avatar
Quote:
Originally Posted by Lostcity
I'm using the turnigy 1811/2000kv so looks about right thanks

Sent from my SM-T230NU using Tapatalk
I don't know why I did not post it before, but I've had the pdf file for some time now for the landing gear. That is the same motor that I used, so here you go!

Ken
Latest blog entry: Mini H Quad Project
Nov 13, 2016, 11:04 AM
Registered User
Thanks Ken, looking forward to getting my Nutball in the air.
Nov 16, 2016, 11:27 AM
Registered User
Well got it done was able to maiden it today as the fog lifted. What great little flyer. Trimmed pretty easy. Your recommended settings worked very well. I did wind up adding 5/16s up elevator. It will be a good gym flyer this winter. Thanks for the landing gear pattern. I found landing gear with this plane acts more as an arrestor than landing gear though when landing in grass. When i take it outside, I'll take gear off. Also forgive for pirating your paint scheme. No imagination here😬. Thanks again for another outstanding product.


Sent from my iPhone using Tapatalk
Nov 16, 2016, 12:38 PM
Ken's CAD Models
dz1sfb's Avatar
They say that imitation is the purest form of flattery. LOL!

Congratulations,
Ken
Latest blog entry: Mini H Quad Project
Jan 09, 2017, 06:35 AM
Registered User
Additionally , I put the Turnigy 1811-2900 with a 5 inch gemfan prop. Makes it more manageable for small venue. It has generated a lot of comments

Sent from my non-combustible Samsung

Thread Tools