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Nothing beats a "birds eye view" or maybe a model airplane's view. Ever wonder what the earth looks like from your airplane's point of view? Ever thought of flying your airplane from the miniature pilot's prospective?
Cameras in model airplanes are not new, but they can add a whole new dimension to modeling. I have seen some great photos and videos from cameras aloft. I have also seen some wireless video systems that work well and can even put you in the pilot's seat. Wireless video systems require a small camera, transmitter, and battery installed in the airplane with a video receiver on the ground plugged into a camcorder and/or TV monitor. While such systems have been around awhile, technology is making these systems smaller - just right for our models.
My first airborne video system, small but not much range. 9 volt battery plugs into the camera transmitter unit. White box (top of photo) is the video receiver on the ground that plugs into your camcorder.
The first airborne video system I installed in one of my airplanes is shown in Photo #1. This system has a very small camera/transmitter unit that measures approximately 3/4" x 3/4" x 3/4". The short black wire (right side of camera) is the antenna and the other wire attaches to a 9 volt battery. The camera/transmitter and a 9 volt battery is all that is required in the airplane. The white box (top of Photo #1) is the receiver that stays on the ground and is powered by 9-12 volts DC. The receiver has a "video out" that may be plugged into just about anything with a "video in" such as most TV's and camcorders.
When I bought this system I was told it had a range LOS (line of sight) approximately 1000'. I thought that in a small electric airplane it should be plenty of range. I had a ball with this system - there's just something about cameras - we seem to fly a little differently, it doesn't matter if someone is taking our picture while we are flying, or if the camera is in the airplane - we find ourselves flying lower, more aerobatics, and ... let's see if I can fly this thing between those two trees. I recorded all my flights and have some great videos. I have even flown the model while looking at a TV monitor that shows the pilot's view.
While at a recent QSAA (Quarter Scale Association of America) event held in Las Vegas, NV (actually at a nearby dry lake bed), I took a walk down vendor row and ran into an old friend, Monte Salot, who was selling his wireless video system. I have known Monte for some time, as he has been attending QSAA (and other shows) for at least 15 years selling his equipment. However, up until now, I had not been bitten by the video bug and did not have a benchmark for the quality of such systems. I watched Monte's system in operation on a large color TV monitor in his booth while someone was flying his airplane. WOW! What a good clear picture without snow or loss of signal. Since this was a 1/4 scale event, Monte was flying a large (1/4 scale) airplane at great distances from the video without loss of the video signal. In my mind, this put the system I had been flying to shame.
While I have some great videos from my first system, half the tape is snow as the video signal comes and goes, it didn't seem like I got anything close to the 1000' range. Flying a model while looking into a TV monitor gets real interesting, when the image turns to snow, and at the same time I am a little unclear as to the whereabouts of my airplane.
Well Monte, now that you have gotten my attention, what systems are you selling? I was handed a brochure that explained his company, "Wireless Video Cameras.Com," 46 Calle De Los Ninos, Rancho Santa Margarita, CA 92688. Phone (949) 533-3516, fax (603) 251-8331, online at:
www.wirelessvideocameras.com
and you can e-mail Monte at:
sales@wirelessvideocameras.com
As it turns out, Monte offers either CCD or CMOS cameras with various transmitter/receiver combinations. All of this equipment operates in the 2.4 GHz range on video channels 1 or 4. Some transmitters are on a single frequency while others have channel selector switches. The transmitters are typically 100 mw (1/10 watt) or you can supercharge the transmitter for an additional cost to obtain a 1 watt output. These systems also include a receiver that remains on the ground, plugged into your TV and/or camcorder. All of these systems can operate in color and also include audio as well as video.
This is the AAR14-3 airborne video system from Wireless Video Cameras. This system includes a CCD camera, 380 lines of resolution, and is available with a 100 mw or a 1 watt transmitter. Airborne system weighs 4-3/4 ounces, less batteries. Good image and reception quality with this system.
Shown in Photo #2 is the AAR14-3 airborne video system that has been supercharged with a 1 watt transmitter (approximately 3 mile range) that measures about 2.50" x 2.20" x .90". There is a coil of wire from the transmitter that attaches to its antenna, the antenna itself is to be mounted on your model pointing down. The color CCD camera has 380 lines of resolution and with its built-in microphone measures 1/2" x 1/2" x .60". This airborne system weighs about 4-3/4 ounces, less batteries. This system requires 12 volts DC at 500 mA for the transmitter plus 120 mA for the camera. Probably Monte's most popular airborne video system is the system described above but with a 100 mw transmitter (approximately 1.45 mile range, not supercharged). All the specs are about the same except the power requirement is 12 volts DC at 250 mA for the transmitter, your batteries will last about twice as long.
The 12 volts DC is usually 8 AA alkaline batteries. This is the system Monte was demonstrating at QSAA and can be installed in most 40 size models. The only item of real size and weight is the AA battery pack, weighing close to 8 ounces. I quickly replaced the AA batteries with four KOK1020 Kokam Li Poly batteries (weighing less than an ounce each) from FMA Direct (see Radio Spectrum March 2003). Now I have a video system that can be installed in any 40 size model. Note: the 100 mw airborne video system draws less than 370 mA, you could use batteries as small as the KOK145 Kokam Li Poly batteries (weighing approximately 1/8 ounce each) if you have short flights and recharge between flights.
Standard 2.4 GHz video receiver shown with cables. Note paddle antenna. This receiver also includes video and audio outputs that are to be plugged into your camcorder and/or TV monitor. Operates on 12 volts DC at 360 mA.
The AAR14-3 system also includes a ground video receiver shown in Photo #3. Note: the paddle antenna that is to face towards the model. This receiver operates on 12 volts DC and draws about 360 mA and includes a "video out" and two "audio outs," left and right. The receiver operates on 2.4 GHz and has a video channel selector switch for video channels 1 or 4. When the supplied cables are plugged into your camcorder's "video in," the view finder or view screen becomes a monitor as you record the action. You may also plug in the included audio cable into your camcorder's "audio in" and record sound, usually engine noise ... or ... you could upgrade the video receiver to a BWRXTV shown in Photo #4. This receiver operates on 12 volts DC and draws about 900 mA and will also receive video channels 1 or 4. This receiver includes a small speaker with a volume knob and a black/white 5" monitor. The built-in monitor is great during set-up, allowing you to easily aim and focus the camera, etc. The monitor on this receiver is black/white, however, the "video out" is in color, this means if you plug this receiver into your camcorder's "video in" your tapes will be in color. This receiver also includes an "audio out" to record sound if you would like.
BWRXTV 2.4 GHz video receiver that can select video channels 1-4. Note: paddle antenna on top. This receiver has video and audio outputs and also includes a 5" black/white monitor and speaker with volume knob.
These two video receivers work well as supplied. Note in Photos #3 and #4, each receiver has a "paddle" antenna. These "paddle" antennas have slash marks on one side - the front side - and must be positioned towards the model. I have found the alignment of the antenna is not that critical, since the receiver is probably in the pit area or behind the pilot, simply aim the antenna towards the flight line. This was the set-up during the QSAA and even when I flew Monte's 1/4 scale airplane off the "ends" of the receiver antenna to where the airplane was hard to see (100 mw system) the video monitor only showed slight snow and did not lose the video image. Like I said before, this stuff works good. If you are concerned about aiming the receiver antenna, you can purchase an Omni Mag-Mount receiver antenna. The Omni Mag-Mount antenna can be placed on top of your car for example, and does not have to be aimed. If you have a need to increase range, you can order a system such as the AAR05 which includes a high gain directional receiver antenna. This antenna gives the 100 mw system about a five mile range.
AAR14 is a less expensive, but larger airborne video system. System also draws less current with the CMOS 310 line camera.
Photo #5 is the AAR14 airborne video system which is less expensive, but is a larger system. The CMOS camera (right) has a built-in microphone and only draws 42 mA with 310 lines of resolution. The CMOS camera is also a little slower in recovery from light to dark such as flying the camera into the sun. Other than that, I found it was hard to see any difference in quality of the picture with this camera. The camera itself is bigger and measures 1.60" x 1.90" x 1.30" and is attached to a fairly large swivel mount, the weight of the camera/mount is approximately 3-1/4 ounces. The transmitter (center of Photo #5) is also larger and measures 3.0" x 2.50" x 1.10", weighing approxi-mately 4-3/4 ounces. This video transmitter is available in either a 100 mw or supercharged 1 watt version. Transmitter power requirements are 12 volts DC at either 250 or 500 mA. The unit will transmit on either video channels 1 or 4 and has one "video in" (front camera) and two audio inputs (left and right). The battery box, shown in the left side of Photo #5, holds eight AA batteries (12 volts), switch harness and connectors are also shown.
If you want to really get into a quality camera, Monte offers a color CCD camera with 450 lines of resolution. The camera itself operates on 12 volts DC and draws 180 mA and may be plugged into the transmitter described in Photo #5. You need to be careful with the word "quality" in the video world, in this case your camcorder may be the limiting factor. You need to upgrade all the components in the system to obtain the highest quality.
Take a look at Monte's Website:
www.wirelessvideocameras.com
it is extensive and offers a lot of options. The components are built well, and can take the vibration of our models. And the stuff is FCC legal (Ham license may be required for some items). I think you will be pleasantly surprised with the image and reception quality of these systems! Especially if you have tried some other systems.
Don't let a Ham license scare you away. Radio Shack offers a book Amateur Radio Technical Class that has all the questions and answers that would be on the written test. The test is 35 questions, multiple choice and only requires 72% to pass. This book also includes 800 numbers to locate a local testing site. The Morse Code has been eliminated from the technical class. Here is a link to the book's publisher:
http://www.w5yi.org/Technic.htm
Give this a try. Install a video camera at the pilot's viewpoint. Take a nice size color TV to the flying field (12 volt or use an inverter or generator). Place a cardboard hood around the TV to block glare from the sun. Then set up your transmitter to a buddy box trainer system, let the instructor fly normal, looking at the airplane - the student looks at the TV monitor. The instructor should be coaching the TV pilot, verbally giving location and altitude, etc. Before you know it, you will be flying completely from the TV monitor. Hint - turn up the TV volume and listen to engine sounds. This helps judge airspeed and throttle settings - especially on landings. Food for thought, have fun!
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