the "CAM" of F5J altimeters

Designed solely for F5J style competition, the CAMf5j is the easy to use F5J altimeter. NO programming required. NO computer needed. Just plug it in and fly! And, since it comes from Soaring Circuits, you know it's designed, built and supported right here in the USA. The CAMf5j is approved by the FAI for international F5J competition.

The CAMf5j features a large, bright, easy to read display and heavy duty 22AWG through-hole soldered leads. The dimensions are 29mm x 21mm x 6.5mm and it weighs 9.5 grams. The CAMf5j may be powered by 3.2 to 8.0 volts.

Now available in both FAI and USA versions!
(USA version allows motor restarts as per F5J USA Tour rules)

Note: In the US, CAMf5js are now available from Soaring USA, Flight Comp, Aloft Hobbies and Hobby Club

Retail price just $59
(see dealer listing below)


Competition Altimeter for Models

Designed for the new 200m altitude limited electric soaring (ALES) format, the CAM is small, light, and easy to install. Just plug it in between your receiver and ESC. That's it! The CAM automatically shuts your motor down at 200 meters or after 30 seconds per the Academy of Model Aeronautics ALES (AMA Event 463) rules. This new competition format promises to put the "soaring" back into electric sailplane contests. Even inexpensive RTF models can compete!

The CAM has selectable cutoff altitudes of 100m, 150m and 200m, and does not require a computer or separate programming device to use. You can easily change the cutoff right at the field. With the CAM you can make multiple climbs to cutoff without having to land. Great for practicing! And, the CAM is designed, built and supported right here in the USA.

CAM Installation Diagrams

New lower retail price! Just $39
(see dealer listing below)


Soaring Circuits is the home of the RAM3
All the functionality of the RAM2, but about half the size and double the memory!


RAM3 Specifications

  • Size: 3/4" long x 5/8" wide x 3/8" high.
  •  Weight: 2-1/4 grams.
  • Resolution: < 1 foot.
  • Sample Rates: 1, 2, 5, or 10 samples/second.
  • Memory: Over 18 hours at the 1 sample/second rate.
  • Interface: USB, cable included.
  • Power Supply: 3.1 to 15 volts.
  • Current Draw: 5 milliamps.
  • Operating Temperature: -4F to 140F (-20C to 60C)



RAM3 Complete

RAM3 Features

  • Comes complete with everything you need including PC interface cable, FlightView software on CD-ROM, breathable anti-static protective foam wrap, and instruction booklet.
  • Small, light, and easy to use.  Installs in minutes.  Plugs right into your receiver using the detachable lead, or use a separate battery.  Wide supply voltage range lets you power the RAM3 from a single LiPo cell all the way up to a 12 volt battery.
  • Fine tune winch & hand launches, motor/battery/prop combinations, camber settings, climb & sink rates.
  • Large memory holds a whole day's worth of flying.
  • 1, 2, 5, and 10 samples/sec sampling rates.
  • Requires PC running Win XP/7/Vista with USB port.

Now includes USB cable
and still just $79

RAM3 Plot

FlightView 3.3 Software

  • Upload, view, and save flight data on your PC.
  • Reload and view previously saved flights.
  • Zoom and pan both time and altitude.
  • Set Start and End markers with the mouse.
  • Set Altitude marker with mouse.
  • Rate of climb/sink window.
  • Delta altitude window.
  • Re-Zero and Tilt functions to correct for barometric drift.
  • Atmospheric temperature compensation for maximum accuracy.
  • Export in standard .CSV file format to view data in your favorite spreadsheet.

Price: Comes with RAM3 or Free Download



LiPo Battery Features

  • Ready to plug right into your RAM3.
  • Weighs about 2 grams.
  • 50mAh capacity will power the RAM3 for 9-10 hours.
  • Can be charged at up to a 100mA rate.
  • Comes complete with charging adapter lead.

Price: $15



Simply plug the LiPo battery into the RAM3, fold it back, give it a wrap of foam, and stick it anywhere you want in your model.  Then go fly all day!  Will even fit into tight hand launch fuselages.  The complete self contained package shown above weighs only about 4.5 grams!

Soaring Circuits products are available from the following dealers!


Soaring USA

Esprit Models

Graves Hobby

Remote Control Hobbies

R/C Hangar

Coyote Hobbies

Hobby Club

Flight Comp

Aloft Hobbies

Nankin Hobbies









Questions and comments may be sent to soaringcircuits@gmail.com

Last Update: February 11th, 2018

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