HobbyKing.com New Products Flash Sale
Prof100's blog
Posted by Prof100 | Oct 04, 2014 @ 07:53 PM | 2,668 Views
Here is very good starter available from a pro Seller on RC Universe. I have seen it in action. Price is $127 plus shipping and it comes with 2 cups. 12-18 volt 6-1 gear reduction starter w/3cell LiPo and 2 inserts (one of each size). Have a lipo already? Order without a lipo and save $20. I bought one with 2 inserts and no lipo for $117 shipped ($107 plus $10 shipping).

http://www.rcuniverse.com/market/item.cfm?itemId=999890



Posted by Prof100 | Aug 30, 2014 @ 08:54 PM | 2,748 Views
Here is a quick post of what it takes to wire and build your own A123 receiver packs using 2500 mah cells. I use these for my gasser giant scale planes. Cost is about $25 including cell shipping.

PREFERRED CELLS
You want genuine A123 cells and you can buy them from RadicalRC for $10 each. The cells do NOT come with welded on tabs so you have to know how to quickly solder the wires on cells. Also, you have to carefully prep the surface and scuff it so you get to bare metal then tin the surface.

BATTERY PACK SHRINK
You can also buy shrink for $1 a foot (95 mm) to cover the pack.

PREPPING THE CELLS
You need to glue the cells together and tin the cells with solder before soldering. I use CA with Accelerator to glue them together.

SOLDERING and PROTECTING THE SOLDER JOINTS AND CELLS
After tinning you solder the leads on as per the picture wiring diagram. I slide on some shrink tubing to further protect wire leads. Once everything is soldered use fiberglass tape or 3M cross weave fiberglass tape to position the wires and help with stress relief. I finish off the pack with 95 to 100 mm heat shrink with the shrink covering the ends of the cells and solder joints.

PICTURES AND DIAGRAM WORTH A THOUSAND WORDS
The pictures describe the wiring harness. I always add a Deans connector if the Cellpro 4S is missing its connector so you can charge directly with no balancing (but not desirable). This setup balance charges through the switch. If you balance...Continue Reading
Posted by Prof100 | Mar 02, 2014 @ 08:41 PM | 14,258 Views
I thought I would start a thread in my blog for modifying the Carbon Z Cub. The Carbon Z Cub is produced by E Flite and its design team was lead by Quique Somenzini. He left Horizon Hobbies at the end of October 2013. I believe this was the last plane he designed for Horizon Hobbies

Below is from his Wikepedia page:
Quique Somenzini is a professional radio controlled aircraft pilot and designer, owner of model manufacturer QuiQue's Aircraft Company and the 2007 FAI world champion.

A native of Rio Cuarto, Argentina, Somenzini has the distinction of being the youngest competitor in the history of the FAI championships, flying in competition in 1979 at the age of twelve. His father, Mario, is a former champion as well and introduced Somenzini to the hobby of model aircraft flight at the age of nine.
ABOUT THE PLANE

The Carbon Z Cub is the largest production foam airplane. It is a 20% scale RC aircraft.

Product Description

Key Features
  • Easy-to-complete final assembly
  • Quique Somenzini design and attention to details
  • Exceptionally strong, easy to repair, Carbon-Z® construction
  • 5-channel control including functional flaps
  • E-flite® 60-Amp Pro Switch-Mode BEC Brushless ESC included
  • Digital servo control including operational flaps installed
  • Pre-hinged control surfaces with control links installed
  • Plug-in wings and stabilizers
  • High-grade socket-head hardware use throughout
  • Hatch covers provide easy access and a wide range of battery options
  • Included 3 meter
...Continue Reading
Posted by Prof100 | Jan 06, 2014 @ 07:20 PM | 6,051 Views
Introduction

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This gif creator works on Windows, Mac and Linux, the only thing you need is a Web browser with flash player installed.



Posted by Prof100 | Dec 01, 2013 @ 11:25 PM | 6,010 Views
Bought a Eflite Splendor from Horizon for $269.99 which include 10% off and free shipping.
Posted by Prof100 | Nov 29, 2013 @ 02:15 PM | 5,898 Views
John Redman AR635 programming video...HorizonHobby.com How To - Programming Your Spektrum AR635

http://www.youtube.com/watch?feature...&v=-ALhC0H5R-M
Posted by Prof100 | Nov 27, 2013 @ 10:28 PM | 6,887 Views
Finished wing bags and coversfor vertical and horizontal stab.
  • $23 a roll for 24” wide. Reflectix 3/16” thick. 25 feet long.
  • 22.25” wide by 94” piece for each wing bag.
  • Regular sewing machine with straight stitch and longest stitch.
  • Thread was simple, everyday mending thread.
  • Woodpecker is used to puncture the bubble wrap that's sandwiched between the foil. Woodpecker is used over carpet or cutting board. Do both sides twice and inboard enough to allow insulation material to fit under the shoe.
  • Don't forget Sewing 101 and to properly engage the bobbin thread with needle thread. And, lock the stitch by going back and forth using the reverse switch on the sewing machine. Never used a sewing machine just google the make and model in Youtube and there will be endless how to videos.
  • Must push and pull through sewing machine.
The inspiration video for making the bags is courtesy of estrickland1.
How to Make a Wing Bag, wing cover. (23 min 19 sec)(23 min 19 sec)
Posted by Prof100 | Nov 10, 2013 @ 12:15 AM | 9,713 Views
UPDATE 2/23/14
Ordered and received Kavan 6" inflatable wheels and tires (PN 0266) from Sig Mfg. They are lighter than stock. A small brass fitting comes with it that you screw in to inflate. I will fly them as received. With a 5 mm axles on the CZC the smaller of the delrin inserts (3/16") have to drilled out with 13/64" (.203) drill.


Ordered and received an Eflite 2.5" aluminum spinner (EFLSP250) that replaces the plastic one. It's a bit pricey at $26 but it looks cool. It comes with 5mm and 6mm size collet adapter. The long screw is a English sized hex head.


Ordered a Power 60 470 KV motor as a spare from Horizon. Stock motor is an unspecified 50 size that it be tasked to work on the upper end of its capabilities. Priced at $109 and free shipping I am OK with having known quality motor to install. It should pull 250 more watts using a more aggressive prop.


UPDATE 1-26-14
With snow and cold I decided to work on installing the Talon 90 in the Carbon Z Cub. It requires opening up the original ESC location to make sure air with flow above and below the rather large 90 amp Talon ESC. The ESC comes with male adapters you solder to the motor leads. I run Deans style for battery connection.





Do you really need a 90 AMP esc? No, but if I want to over prop on pitch I won't have to worry about much other than toasting the motor. The ESC will have plenty of headroom. And, if I opt to do what I normally do and put...Continue Reading
Posted by Prof100 | Jul 19, 2013 @ 10:50 PM | 7,468 Views
After 18 years the club decided to repave the runway. Not only was it repaved it was lengthened 115 feet to 500 feet and widened 5 feet to 39 feet..

Below is time lapse video put together by Rick Reynolds with pictures also taken by Robert Keyes.

I was the project manager of the repaving. Enjoy.
Runway 2013 Flying Pilgrims (8 min 37 sec)
Posted by Prof100 | May 17, 2013 @ 11:20 PM | 11,678 Views
OrangeRx R710 DSM2 Compatible receiver
1 x Bind Plug
NOTE:
1) Accepted by the MAAA in Australia, see the MAAA MOP58 for guidance
2) This is not a Spektrum receiver, nor is it a copy of a Spektrum Receiver.
The Spektrum brand is a trademark of Horizon Hobbies USA.
3) Price of this receiver may fluctuate (up or down) due to cost of electronic components.
4) This is not an underground manufactured fake Spektrum receiver. OrangeRx quality is guaranteed.

Chl 1-Throttle
Chl 2-Aileron
Chl 3-Elevator
Chl 4-Rudder
Chl 5-Gear
Chl 6-Flaps
Chl 7-Aux

Below is the Guardian Installation for 4 channel HK Yak55 3D plane.

Posted by Prof100 | Apr 07, 2013 @ 01:03 AM | 8,654 Views
Here is my homemade plane restraint. I had plenty of material and TIG welder in my shop so I made this safety restraint for my new Hangar 9 gasser.

The restraint is made of thin wall tubing. The spikes are 12" nails. The beauty of this design is the uprights can be simply lifted and let fall to the side. The pivot holes accept 2.5 inch long by 5/16" both on the bottom and the removable pin on the top that permits pivoting out of the way. Vertical tubing is 7/8" square by .083" wall. the tubing has an open slot on the bottom and captured slow above it tto control the drop to the sides The base is rectangular tubing which I never measured. This was again a piece of material I had laying around in the shop.

The 12" nails have 3/4" square tubing T handles welded to them. They're galvanized with a rather thick coating which made Tig welding problematic in that it was a son of gun to get all the coating ground off.

I painted it with Duplicolor rust preventing zinc chromate primer and then a couple of coats of school bus yellow acrylic enamel.
Posted by Prof100 | Mar 16, 2013 @ 11:49 PM | 9,057 Views
NOTE: OPEN UP and scroll down to read about Guardian installation on gasser.

Update: Mid Air Collision Sept. 14, 2013. Plane repair described below. REMAIDENED on Saturday 10-13-13. Plane flew perfectly! No trim required. It is as good as new!


Sept, 14-15 2013 -- Mid air collision with 40% scale during formation flying. This CUB was inverted and flying slow and aft of 1/3 scale CUB. 40% scale CUB pulled up and broke right wing off at the wing tip and 16" inboard. Washout is built in but unknown and Horizon won't tell me because it is proprietary.

Cub Yellow HANU884 Ultracote covering.



Views: 11




Views: 11

Amazingly it was landed with the wing damaged, spar bent, and right side fuselage where wing attaches ripped out.

...Continue Reading
Posted by Prof100 | Mar 03, 2013 @ 09:41 PM | 9,087 Views
Since I just bought my first 1/4 scale gasser (used but like new) I decided to upgrade the 4 cell 1700 mah Nicad RX pack with a A123 pack. I went down two paths. One was to build a 2S2P 2200 mah A123 pack from four Black and Decker VPX cells (two VPX packs sacrificed).

The other pack I wanted was to simply buy a 2S 2300 A123 pack from Hobbyking and add a switch connector lead (male), balance leads and a Deans plug.

4 VPX CELLS
First, I built a 2s2p pack using four Blacker and Decker 1100 mah A123 pack cells. I installed a Deans style plus, added a three wire JST XH balance tap and intalled a 2 wire male servo connector to plug into the Receiver. I subsequently bought an Electrodynamics EDC-77N Ultraswitch II ED-NANO which is wired internally to permit using all three wires of the 3 wire servo male lead as balance tap from the RX pack to connect to the switch. A EDN CP4S-JR Cellpro to JR Node/Balance adapter cord allows the Cellpro 4S to balance charge the pack through the switch. (See below for a picture of adapter charge cord.)

The EDC-77N Ultraswitch II has a output via a 2 wire male connector for powering the receiver. CAUTION: This pack has to be used with a switch that has a two wire output to power a receiver. If I want to bypass the switch and use it directly for powering a receiver I will have to add two wire male servo connector (black and red) or simply remove the white wire from male servo connector end. Confused? Don't be, the next pack I built has both.
...Continue Reading
Posted by Prof100 | Feb 03, 2013 @ 07:06 PM | 15,480 Views
The new EPA / Carb compliant gas cans are the law of the land. The premise of the new law is to minimize gasoline vapors and spills. Unfortunately, the new gas cans have no traditional vent opposite the spout of the can. You could just drill a hole but without being able to cap it there are obvious safety and contamination concerns. The new legal dispensing nozzle is supposed to let air back into the gas can and these tend to be "rube goldberg" contraptions that are awkard to use and the dispensing time and effort are frustrating at best. Most of these new style cans just leak and spill gasoline when dispensing which is what they were supposed to prevent.

I bought the new gas can for field fueling of my gasser. The stock cap and nozzle assembly of these EPA / Carb compliant gas is worthless for our applications. Nevermind the complete PITA they are if you are using one to refuel your lawnmower.

So, the question becomes is how does one "back-convert" the gas can to an old style vented can. That said, you first have to buy one to get started.

Step 1 -- Buy a gas can. I went to O'Reilly auto parts and purchased a 2 gallon Midwest gas can. The price was $15. You can also buy them at Harbor Freight for a $1 less. THIS MODIFICATION ONL'y applies to MIDWEST GAS CANS. Blitz gas cans are similar but I don't know of any caps that work with them them except for the $32 aluminum and anodized one made by Fox that Tower Hobbies sells.

Step 2 -- Install a Gas...Continue Reading
Posted by Prof100 | Jan 23, 2013 @ 10:20 PM | 9,267 Views
For $150 I bought and installed a MrRCSound Budget B sound system. It outputs engine sound at 97 db.

Here is a short video.
Bills T28 Sound (0 min 28 sec)
Posted by Prof100 | Oct 14, 2012 @ 12:21 AM | 10,317 Views
Bare airframe kit purchased for $100 plus $15 shipping. Kit is very complete and full equipped.

Last year I bought a 1W40 with a wemo mini pro fan from fh64_lucky. It now has a home. It will run on a 5S 40C 3300 Sky Lipo (cheap).
Below are some test numbers by EDF Hobbies:

--RClander Shroud 3300kv Wemo mini pro rotor 5s lipo/18.5v 89 amps / 1890 watts / 2.6kg thrust
--RClander Shroud 3300kv Wemo mini pro rotor 6s lipo/22.2v 96.0 amps / 2060 watts / 2.8kg thrust

I will run mine on 5S 3300.

Motor: Sapac MB1 and fan which will provide 1100 watts on a 4S and 1600 watts on a 5S was considered but I settled on a HET 1W40 installed in Wemo Mini Pro.
ESC: Hobbywing Pro 100 amp
Battery: 5S 3300 40C

Video link to install Eflite retracts. This corrects errors in the manual relating to the steering arm:
http://www.youtube.com/watch?feature...&v=p9DrEH3zxW8

to finish the bare fram I used Styrospray 1000 (aka Liquid Sheeting) on the fuselage and Evercoat Polyflex on the wing. The Styrospray 1000 requires you to encapsulate the foam. Failure to do so will result in in lifting. It is not flexible either. Hence, I used Evercoat Polyflex filler which can deflect up 77 degrees. Here is a link to the data sheet.
http://www.evercoat.com/imgs/salesflyers/POLYFLEX.pdf

Unfortunately, it does not adhere very well to the Z foam.




Modifications:
  • ESC mounted in the inlet duct and held in with silicone RTV. 15 inch long stock motor- to- ESC 14
...Continue Reading
Posted by Prof100 | Aug 12, 2012 @ 11:22 PM | 10,444 Views
Here is a video of how to reverse a servo (and HXT500)

http://www.youtube.com/watch?v=hnd1zwouWV4

How to Manually Reverse a Servo (3 min 58 sec)

Posted by Prof100 | Aug 03, 2012 @ 11:10 PM | 13,131 Views
EDIT (5-12-130: GUARDIAN and a DX8 -- setup by Choochoo32
A DX8 works well with a Guardian and a six channel rx is all you need for full control of a 4 ch plane. Do the following:
  • Plug the mode wire into channel 6 and use the flap switch to select 2D/off/3D modes.
  • Plug the gain wire into the gear channel.
  • Go into the setup menu, the one you access by pressing the roller while powering the DX8 on.
  • Locate the switch assignment submenu.
  • Find where it says "Gear:" and change it to inhibit.
  • Find where it says "Knob:" and change it to gear.
  • Undo any other settings or mixes etc, that you may have made for the Guardian. The most sure way is to first reset the model memory before doing the above.
This will give you full mode control on the flap switch and master gain control on the knob. You can reverse these channels to make the controls work to your liking. I like the gain to go up clockwise on the knob, for example, like a volume control.

The V1.18 update shouldn't matter for you unless your Guardian is mounted upside down.

++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++


I bought two units from ReadymadeRC and installed them in my old Superfly and the Leadfeather scratchbuilt delta. Both are hardly used and if I crash them I don't care.

Both are deltas with elevons. Superfly has no rudder but the Leadfeather delta does.

All radio mixes for elevons are deleted and reset to standard aircraft. The Guardian does the elevon...Continue Reading
Posted by Prof100 | Jul 14, 2012 @ 01:33 PM | 11,581 Views
Freewing designed F9F Panther made from EPO and with a top loading battery hatch. The Starmax version (tad larger) has larger intakes and cleaner ductwork. This plane has a cheater on the bottom to let in more air to make up for the smaller, but scale air inlets.

EPO is great for crashworthiness but it can move around in hot weather or slight load when storing. To prevent warping I added 1.5 mm CF in the wings (front and cross) and horizontal stab.

Purchased from ValueHobbies on a $10 off sale for $69.99.

Assembled using 5 minute and 15 minute epoxy.

The battery compartment doesn't willingly accept a 3S 2200 30C without modifying it. Simple cutting out of the wood floor and the battery drops to the floor. Velcro added to the foam foam plus the strap keeps the battery in place.
  • Motor: 4800 KV Don's Wicked with a balanced fan
  • ESC: 40 amp Pentium w/switchmode BEC
  • 485 watts with 51.4 mm thrust tube
  • Servos: stock
  • Receiver: Orange Hobbyking spektrum (set up with spoilerons)
Aileron control horn snapped (brittle plastic) so I added Dubro micro horns.

UPDATE: Maiden flight required moving battery forward and adding half ounce to the nose. The large exhaust seems to be limiting the speed of this nice looking EDF plus lack of real intake ducting and cheater holes make this thing sound like a hair dryer.

THRUST TUBE
I added a mylar thrust tube to reduce the outlet 51.4 mm. I used 7 mil mylar to make the tube. The Cone Layout program made the pattern to layout the shape on the mylar. Dimensions are:
  • Outlet 51.4 mm
  • Large end: 66 mm
  • Length 151 mm.
Transparent tape holds the thrust tube together and Foam Tac glue was used to adhere the fan housing to the tube. The exhaust outlet was made concentric with the foam outlet by some deft place of low temp hot glue. I have not flown it since the thrust tube addition but will when I have time.