Ohmsick Angel (oz15207)


Ohmsick Angel (oz15207) by Randy Wrisley 1980 - plan thumbnail

About this Plan

Ohmsick Angel. Radio control sport trainer model. Wingspan 43 in, for electric power witrh Astro 020 motor.

Quote: "Ohmsick Angel by Randy Wrisley. Crowded flying fields and high modeling costs getting you down? This distinctive looking free-flight-with-a-radio-in-it may be just what you need. Uses Astro 02 electric, 1 or 2 channels.

It's Sunday morning at the flying field. Beautiful day, must be 50 people here! As usual, the pattern boys are doing 90 mph maneuvers up and down the runway. The club scale buff in the next pit is busy tuning his Quadra-powered B-24 prior to a flight. Admidst all the din and confusion you realize there are only nine people waiting to fly on your frequency.

Sound like your situation? If so, an Ohmsick Angel may be your ticket out. Electric flight is quiet, so quiet you can now fly in the local schoolyard! No noise, no crowds, no mess. Even if you can only fly at the club field, you can usually fly before the gas models are allowed to start.

Once you make the investment for the motor, batteries, and charger, that's all you buy. No more fuel, glow plugs, or mufflers, ever. I saved even more by not buying a fancy $50 charger. All you have to do is modify an Astro Flight auto charge cord by adding a second connector in series with the first. Now you can charge two 4.8-volt packs at the same time. Since you don't have an automatic shut-off, watch the time closely; 15 minutes is the limit.

As for the aircraft, it's a simple sport free-flight type with a two-channel Cannon radio to keep it from flying away. The design traces its origin back to the early PAA-load models of yester-year. It weighs 15.5 ounces ready to fly and has a wing loading of 9.5 ounces per square foot. The powerplant is an Astro Flight 020 R/C system. Don't let the large lifting stab scare you; I believe in making all the surfaces work. By moving the CG aft, and making the stab lift instead of just stablize, you get better performance.

In keeping the model simple, I did not provide for a whole lot of battery cooling. After a six to seven minute flight, I let my batteries cool on the ground before recharging. I've shown an air-scoop on the plane if you feel it is necessary. Long thermal flights with the prop freewheeling will cause the batteries to get hot, too. An internal on-off switch rigged to the elevator would be a welcome addition. Now, if you're ready, let's get down to the nuts and volts of construction.

Fuselage: Cut two identical sides from firm 1/16 balsa. Using Super Jet or the like, install the 1/64 plywood doublers front and rear. Build formers No.2 and 3 on the plan. While they dry, glue the remaining square and triangle stock to the sides. Pull the tail together and cement formers No.2 and 3 in place. Cut the 1/8 square cross-pieces to size and install them aft of the cabin..."

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Ohmsick Angel (oz15207) by Randy Wrisley 1980 - model pic

  • (oz15207)
    Ohmsick Angel
    by Randy Wrisley
    from Model Builder
    January 1980 
    43in span
    Electric R/C
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 18/03/2024
    Filesize: 561KB
    Format: • PDFbitmap
    Credit*: IanSalmon
    Downloads: 232

Ohmsick Angel (oz15207) by Randy Wrisley 1980 - pic 003.jpg
Ohmsick Angel (oz15207) by Randy Wrisley 1980 - pic 004.jpg

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