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Posted by Prof100 | Mar 06, 2018 @ 09:56 PM | 878 Views
EV800 upgraded with a DVR using the $15 Eachine ProDVR.
I finally added the Eachine ProDVR to the EV800. It requires some soldering skills using a fine tip soldering iron and rosin core solder; a No. 1 Philips screwdriver; and a review of the Youtube video that describes what to do. Four wires are soldered to the board — ground, video, audio, and power. Below is the Albert Kim how to video. Note that he has updated the Youtube page that states the 3.7 volt on board battery is sufficient to power the ProDVR. He also pops out the LED indicator to feed the wires to the board. I liked the LED indicator and opted to drill a hole.

Eachine EV800 Goggles DVR Mod (6 min 45 sec)

Both were purchased over a year ago. And I finally got around to the installation. While the ProDVR says it needs 5v input it operates well with 3.7. Do not exceed 5volts because you will burn it out. Use a filtered in line voltage regulator to step down voltage for 2s and greater battery voltage. In early versions were supposed to permit HD video recording but they forgot to program it in the firmware. More about fixing this in the last paragraph of this post. Newer versions may have the firmware update but I doubt it.

Taking advantage of user selectable video quality
It took more time to set the recording resolution to HD versus the default VGA than to physically wire and install the DVR. Why so long? Answer is simple. The manual was wrong. Manual said...Continue Reading
Posted by Prof100 | Mar 04, 2018 @ 09:01 PM | 1,370 Views
I have the Eachine EV800 but it did not have a built in DVR or Diversity. So, for $100 I bought the EV800D googles with DVR and Diversity. It has better optics.

The 1200 mah 2S stock internal on board battery runs down in less than hour with the DVD running and Diversity turned on. You can, however, plug in a 3s battery where the charger is plugged in and it will charge the on board battery. I made a 3s lithium ion pack (18650) that is velcroed to the back of the head strap. In sum, this pack is supplemental power for the EV800D goggles made from off the shelf rechargeable yard light batteries made by Westinghouse and sold at Walmart. These are lithium ion low amp draw cells (7 amps). Make sure to charge with the right chemistry on your charger selected, By the way, any 3s pack will do.

DVR Recording and playback
Video is AVI and pictures are jpeg saved on FAT32 card. Reformat the card whether used or new. Far right button controls recording. Short press snaps a picture. Long press and a red record light goes on in the upper right. Light goes off after awhile. Press again to stop and save. A red box appears when saving to card.

To playback press source, menu appears and DVR is highlighted. Quickly press channel band button and select a video or pict. Press record button to start playing.

The on screen battery charge level indicator is worthless. It goes down to one green bar in a few...Continue Reading
Posted by Prof100 | Feb 17, 2018 @ 09:57 PM | 1,635 Views
Just a placeholder for this unique plane that I want to use to learn how to do FPV flying. $100 PNP including a stabilizer. Runs a 3s or 4s 1800 mah.

This 860mm Wingspan Nano Talon is a portable edition of the Talon Airframe series. It is super easy to hand-launch and fly because of the gyro, This Nano Talon is very convenient to carry with because the detachable mainwing and tail wing can be detached easily by plugs and magnets. The built-in servo structure makes the airfoil more aerodynamic, and avoid damage even in a crash. The inside room and extra bottom hatch are also huge for more FPV gear.
Brand Name: ZOHD
Item Name: Nano Talon
Wingspan: 860mm/33.85in
Length: 570mm/22.44in
Rudder: Yes (V-tail)
Flap: No
Aileron: Yes
Flying Weight: 361g(w/o FPV gear)
Material: Crash Resistable EPP
Weight: 700g
CG: 3.5cm from the wing leading edge(mark under the wing)
Color: White + Black
Motor: ZOHD 2204 1870KV BL
Motor Shaft Diameter: 5mm
ESC: 30A W/1A BEC(XT60 connector)
Servos: 3pcs 8g digital servo
Propeller: 6x3 Inch
Recommended Battery: 3S 1300-1800mAh XT60 connector Click here
Recommend Radio: ≥6CH Click here
Flying speed: 12 to 90km/h
* Built-in Gyro make the Nano Talon flys super stable, and easy to control.
* Autonomous fly directly after hand-launch, never crash when take-off.
* EPP molded wing, pre-built-in Carbon Fiber spar for enhancement, light and flexible plus crash resistence.
* Detachable mainwing and...Continue Reading
Posted by Prof100 | Nov 29, 2017 @ 09:03 PM | 3,106 Views

Just arrived as part of my 2017 Black Friday Sale purchase. It was $85 shipped from Hobbyking USA warehouse (11/29/17). Free shipping closed the deal for me. Normal price is $117 plus shipping..
  • 900mm (35.4”) wingspan ARF foam plane
    2200 Kv motor with a 6x4 prop
    3S or 4s lipo.
  • Assembly was easy although no glue or instructions were included in the box. The downloaded manual says to use included glue. HK site has a downloadable manual. Beacon RC Foam Tac glue was used. It used to sell for $4 a bottle but it doubled in price a few years ago for what appears as nothing more than a money grab. Servo arms had to be drilled out to accept the clevis.
  • Wing tip skids added to preserve the foam.
  • Reflex was set on the elevons per manual. Throws as published are well over double what is needed per a review at the field today with two other planes. Following instructions for throws and reflex will result in a epic adventure on your maiden flight. Reduced reflex to 0 mm because this design of the red version had reflex built into the wing but the manual was NOT updated. Reduce elevons to 40% of published specs.
  • Short servos extensions required for Rudder and drop gear servos to connect to the receiver. All I need to do is verify CG. I carved out a pocket for the receiver on the starboard side.
  • A couple of coats of pure acrylic protect the surface and I painted the bottom of the plane a bright yellow (Duplicolor) and left two red stripes. This helps with
...Continue Reading
Posted by Prof100 | Nov 27, 2017 @ 09:30 PM | 2,606 Views
My NIB v2 T28 by Durafly arrived today (11-27-17). Box arrived intact. Hurrah for FEDEX. Black Friday pre holiday free shipping closed the sale for me. Total price was about $155 US.

I opened the box and pulled out the wing to test the main retracts with a servo tester. They worked just fine. Doors did not bind, however, I will remove them simply because they prevent checking for bent 3 mm wire struts in the retracts. They are prone to bending that causes the retracts to hang up and fail to function. Wheels must turn freely in the wheel wells.

Foam is excellent. Yellow paint is different than the bright yellow used on Eleven HobbyT28 I also have. This plane has a yellow with a bit more red / orange tint mixed in. I had Lowe’s paint dept. scan the horizontal stab and they made a perfectly matched 8 ounce sample that cost $3.50. The paint only comes in a satin finish whereas the original paint on the plane is a fairly flat finish.

This will take some time to assemble given the control horns require installation which is unusual these days with ARFs. I can strip the self tapping screws as well as the assembler in China.

This plane includes a dive brake and and a FPV mount inside the cockpit. Dive brake will not be enabled to function since it takes up a radio channel. I need two channels for the Guardian mode selection and remote gain.

I will update this thread and take pictures to outline the steps as I assemble it.

Step 1 — Gather the...Continue Reading
Posted by Prof100 | Oct 22, 2017 @ 08:56 PM | 4,048 Views

Eleven Hobby T28 and Improvements (1 min 37 sec)

  • Great value for a 1100 mm (43)" wingspan ARF foamT28 plane.
  • Assembles in 15 minutes.
  • Weighs 42 ounces or 2.625 lbs. with no battery weighed on my “Portion Power” digital scale. This is relatively lightweight. By comparison, the 1400 mm or 55 inch wingspan V1 FMS T28 weighs a whopping 85 ounces or 5.3 lbs. which is more than double. Newer versions are supposed to lighter due to a lighter foam being used.
  • Excellent flying plane. Flys slowly without surprise tip stalls. At wide open it can be flown very aggressively with no bad habits with or without using the rudder during turns. Very little up elevator required for turns. Great low wing aileron trainer.
  • Sold exclusively by Banggood under the Eleven Hobby brand. FMS makes the plane.
  • This plane uses a 3S 2200 Lipo. Note: Hobbyking carries the Durafly variant which runs on a 4S but has a lower pitch prop and lower KV motor. Some of the parts interchange. Retracts use a 4 mm axle. Durafly uses a 3 mm strut wire / axle.

There are several very good YouTube videos ranging from unboxing to flight tests. Just search YouTube.

Below are a series of improvements I have found that work well.

Hinges and skids
Foam hinges will fail over time and protection of the foam surface are key to improving this very affordable RC plane. Hobbyking or equivalent Dubro nylon skids can be installed on the bottom of the wingtips and tail to...Continue Reading
Posted by Prof100 | Oct 12, 2017 @ 10:56 PM | 3,341 Views
Good flyer. World Models ARF is a good quality ARF but features like the landing gear are pretty crude. That is, no articulation. The access door is not hinged but rather it is held in with self tapping screws. Wings, of course, are removable for transport and storage but threaded screws and glued in blind nuts are a bit of an adventure to install when fastening the wing.

Setup notes for World Models 1/4 scale clipped wing Cub
  • Front switch is NOT connected because IBEC ignition eliminates a need for an ignition battery.
  • Charge A123 battery using Electrodynamics lead and the rear Electrodynamics switch for charge input.
  • Aftermarket ignition with red light mounted to the lower left front windshield. Tx must be on and Gear switch set to the ON position to run the motor.
  • Kill / ignition switch mapped to gear switch on transmitter. Red light on is to run he engine, no light means ignition is killed.
  • Motor is a DLE 30 side carb with a Bowman ring.
  • RX is a Spektrum DSM2 AR 6200 with satellite bound to my DX8 Gen 1 TX

Posted by Prof100 | Aug 01, 2017 @ 08:21 AM | 4,142 Views
DX8 setup for Guardian on Elevon plane
Note: F22 by Golem with TV tabs. CG is 17.5" from the nose. Below is maiden video back in 2008. FF to about 30 seconds. Video is not edited well but camera work is pretty good. Back in the day it had the state-of-the-art 20C lipo
F22 with KFm2 airfoil -- Maiden -- built by Prof100 (Golem's (5 min 11 sec)

  • EDIT: 8-3-17
  • RANGE TESTS (30 paces to pass per Spektrum)
    • Range tested a basic 2010 vintage 6 channel Orange DSM2 that I optimistically installed in the plane. This RX has one very short antenna and while it has the capability for a satellite RX, none was available. Results -- Test failed at 10 paces. Not good. Conclusion, this RX, as installed is not suitable for use in this plane
    • Swapped out for a twin antenna Orange 6 channel R618XL -- antenna routed on the left side of plane. Left side range check 100 paces. Right side 60 paces. This RX was a 2017 version. One of three I bought on a flash sale for $5 each. It is a "keeper."

================================================== =====================
I am posting this to make it easier for the next person who wants to program their DX8 radio for Guardian use.. Hope this helps someone else. This DOES NOT COVER SETTING UP THE GUARDIAN. The Guardian was already updated with desired firmware and mode preferences prior to programming the radio. Elevon mixing was pre-selected in the Guardian...Continue Reading
Posted by Prof100 | Sep 14, 2016 @ 01:16 PM | 7,913 Views
WARNING or CAVEAT -- With a AR635 this procedure with prevent the stabilization function from initiating.

I spoke to Thomas at Castle tech support. Auto Calibrate of the throttle is the default and theoretically each time you connect the battery you have to go through a calibration. Truth being better than fiction the 2 second wide open throttle calibration is scarey with 2 hp. electric motor spinning a 16 inch prop. So, in practical terms, all you have to do is position throttle at mid point, connect battery, pull to idle to arm the ESC. idle out and then go full throttle for 2 seconds for takeoff. Top end is recalibrated. Don't like using the Autocalibrate default? Keep reading.

You can easily program the Fixed endpoint throttle using the Castle programming card.

This is written from my perspective as a user of a Spektrum DX8 first generation. This is a three part process. Step 1 is to setup the ESC to use fixed endpoints and Step 2 is to adjust the throttle end points in the servo setup Travel throttle setting interface. Step 3 is to bind the receiver again because you need to reset the fail safe.

STEP 1 -- Switching from auto calibrating the throttle to Fixed
First is to connect the card to the throttle lead from the ESC and pressing the lower right button to Throttle (bottom left) and deselecting auto calibrate and selecting FIXED.

STEP 2 -- Adjust throttle end points.
Once Step 1 is completed you then power up the plane normally and adjust the...Continue Reading
Posted by Prof100 | Sep 06, 2016 @ 08:35 PM | 7,039 Views
Posted by Prof100 | Sep 01, 2016 @ 01:18 PM | 8,945 Views

Stock Splendor except Four basic changes:
  1. Modified Morganmill Battery Cartridge system. CG is achievable without adding much weight to tail. .
  2. Magnets on the canopy
  3. Talon 90 ESC with is 9 amp continuous and 20 amp burst BEC.
  4. Reverse the landing gear for grass excursions.
Morganmill BATTERY Cartridge System (BCS)
BCS secures the battery and permits repeatable CG.

Foam had to be removed to fit the BCS. Plus, the aft section had to be trimmed and shortened to sit flat. A slot had to be opened to fit the ESC to RX lead and the battery connection. Washers as spacers were glued to the cartridge base with contact cement to raise up the base and allow the cartridge to fit over the connection tube that holds the two wing mounting brackets together. Even with that upward spacing of the installed base the removable battery holder (i.e., cartridge) had material removed from the aft bottom to provide more clearance so the cartridge locks in.

All in all the modification is good. I can lock the battery down into a repeatable Position 6 of the Cartridge but I did have to cut a relief in the 6 mm cross tube to ensure the cartridge could be locked into the plane. Installing a Morganmill CZ Cub battery cartridge provides the capability to move the battery pack further than the stock battery pocket. Up to 1.75" rearward from stock is possible if desired. Final balance check will dictate final battery location but a preliminary CG check indicates 1/2 ounces (14 grams) is needed...Continue Reading
Posted by Prof100 | Aug 09, 2016 @ 10:57 PM | 7,431 Views
Below is from Fastflier. Battery slid back, canopy latch fix and reversing the gear make critical sense The switch fails in the open position.

Recommended Modifications: (Listed in the order of priority)
I flew my Splendor several weekends without any mods, just as it comes out of the box.
It flies fine this way, but it is a little nose heavy. Flies better with mod number 2, moving the battery back 3/4ths of an inch.

1. Cut the wire to the On/Off Switch located on the lower right nose. This takes 10 minutes to complete.
The switch isn't's just another point of possible failure.
This switch isn't reliable and has turned Off in mid flight on many Splendor pilots.
When this happens, you lose control. You simply remove the spinner and prop so you can get to 2 screws holding the nose cowl.
Simply remove the cowl to get access to the switch. Cut the two wire. Best to cut them to uneven lengths and wrap the ends with a little electrical tape. After removing the switch, it works like most electrics. Plug in your LiPo and you hear all the beeps and the lights start blinking on the receiver and you're ready to fly. I'm running the Turnigy 6s 30C 3300 mAh and I fly for 7.5 minutes.

2. Elongate the battery area for the LiPo battery by neatly cutting and removing the foam about 3/4ths of an inch to the rear.
This allows you to slide your battery back toward the wing by 3/4ths of an inch so you get the correct CG
...Continue Reading
Posted by Prof100 | Jan 26, 2015 @ 10:18 PM | 12,170 Views
My 4 year old HP Pavilion I7 laptop was getting hot on the surface above the CPU. Temperature was averaging 160 to 170 F. with very little operating in the laptop. This posed a problem and I had to fix the overheating problem or risk damaging the CPU. The machine is unique in the laptop realm because it was equipped with 7200 rpm hard drive.

I actually bought a replacement laptop but found the Windows 8.1 and 5400 rpm hard disk to be no better than my 4 year old laptop. I had 90 days to return the new laptop if I didn't like it with no restocking fee (gotta love Costco).

I decided to see if could fix the overheating problem and speed up the laptop. I considered installing a solid state drive but first I needed to fix the overheating problem by reducing the work load on the CPU. I disabled unnecessary startup programs to reduce CPU load. That helped but the laptop was constantly using the CPU beyond the applications I was running. I wasn't editing video, just running MS Office programs. I found my laptop seemed to be indexing constantly. The Search Indexing function was pounding the CPU and loadings it constantly and heating it up. I then limited the search indexer to ONLY index My Documents, not the whole 1TB hard drive again and again. This helped reduce temperature by about 10 degrees F. That wasn't enough. Load was less. I also ran an array of anti-virus / Trojan cleaning programs and if Malwarebytes didn't catch something then HitManPro. I run MS Essentials to...Continue Reading
Posted by Prof100 | Dec 12, 2014 @ 02:46 PM | 15,953 Views
This blog covers what it takes to install the aftermarket Bowman piston ring in a DLE30. The DLE30 side carb had about 3 hours of run time but it never had much compression from new. It almost felt like the plug was missing.

The Bowman rings (Frank Bowman email and phone number 505-327-0696) are noted for improving performance of RC gas motors because the rings are designed for a very close tolerance end gap (.001" to .002"). Material used and reduced piston ring end gap increases compression and hence power. Cost is about $20 and it arrives in a small envelope with simple set of instructions. This is how it comes when you open the envelope.

The DLE 30 I upgraded was a barely broken in DLE I have mounted in a 1/4 scale Clipped Wing Cub. I decided not to completely tear down the motor but do the minimum disassembly to install the new ring. The installation took about an hour while being interrupted by phone calls.

Tools and supplies needed are simple:
  • 4 mm hex head allen wrench
  • a small box wrench to lever the hex head allen to break away the torque.
  • 600 grit wet/dry sandpaper
  • .001 and .002" feeler gage
  • Blue Thread Locker
  • 2 cycle oil to lubricate the piston, ring and bore before reassembly
  • Goo Gone to clean the grime, carbon, oil and 600 grit wet/dry sandpaper
  • Paper towels
Step 1 -- Remove the prop, screws and cowl -- set aside
Step 2 -- Remove 4mm hex head screws that hold the jug/sleeve/head. These are very...Continue Reading
Posted by Prof100 | Oct 04, 2014 @ 06:53 PM | 14,372 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).

Posted by Prof100 | Aug 30, 2014 @ 07:54 PM | 14,338 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.

(Below is another link to 2016 posting about building your own A123 receiver packs:

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.

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

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

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.

The pictures describe the wiring harness. I always add a Deans connector if the...Continue Reading
Posted by Prof100 | Mar 02, 2014 @ 07:41 PM | 59,308 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.

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 @ 06:20 PM | 16,869 Views
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Posted by Prof100 | Dec 01, 2013 @ 10:25 PM | 16,675 Views
Bought a Eflite Splendor from Horizon for $269.99 which include 10% off and free shipping.
Posted by Prof100 | Nov 29, 2013 @ 01:15 PM | 16,675 Views
John Redman AR635 programming How To - Programming Your Spektrum AR635