Cessna 500 Citation I (oz12073)


Cessna 500 Citation I (oz12073) - plan thumbnail

About this Plan

Cessna 500. Radio control scale model. For twin IC ducted fan and 6 channels. Wingspan 1700 mm. Scale is 1/8.5.

Quote: "Cessna 500 Citation is one of the best business jet plane and proud of high ability. Marutaka has just scaled down into R/C twin ducted model. Designed for lightweight retract gear and flaps. In flying, the speed and stability as jet plane satisfy real scale fans."

Direct submission to Outerzone.

Note photo of completed Cessna 500 model by Mike Zimmerman was found online at https://www.rcuniverse.com/forum/rc-jet... which in turn links to video at https://www.youtube.com/watch?v=Yja2...

Update 1/11/2022: Added kit instructions (and decal application instructions), thanks to Michael Lamonica.

Quote: "General Notes: If you are a beginner to the world of R/C scale, and in particular to ducted fans, please do not attempt this model as a first. You should have mastered R/C flying with a conventional-type airplane prior yo attempting to fly the Citation. Although the airplane is honest & quite easy to fly, it is not a beginner's project, no scale airplane is.

Do not deviate from the ducted fan and engine manufacturer's instructions. The fan units turn in excess of 20,000 RPM and can be very dangerous if not handled correctly. To operate efficiently, the fans must turn at these RPM's. Follow all instructions to the letter, and you should have no problems. Insure that the engine mounting is secure and strong. Make sure that you break in the engines prior to installing them in the airplane. New engines will overhear and not develop full power.

Strive to keep the weight down on the Citation. As shown, the airplane needs no additional 'beefing-up.' Forget the temptation to add a bit of plywood here and there. At our maximum weight of 10 lb, with a six-channel radio, retracts, and flaps, the aircraft performance is excellent.

Flying Notes: The first big difference between fans and props is acceleration. When you pour the coals to a prop-powered airplane; it goes right now, not so with a fan. It must first accelerate, and that time lag can cause problems if you are not aware of it. Always allow the engine and airplane to accelerate prior to pulling the nose up, tight banking, etc. Also, as there is no prop blast over the control surfaces, they tend to be rather 'soft feeling.' A slight loss of thrust can be also expected in high G maneuvers due to interrupted air flow to the fans. Ducted fans are not really hard to fly, just a different-type approach. Keeping this in mind, you should experience no problems.

For your first take-off, point the airplane into the wind. Do not use flaps. Apply full power and allow the airplane to accelerate; steer with nose gear as ailerons will only slow the airplane down. After the airplane is moving rapidly, raise the nose slightly and allow it to become airborn; do not jerk it into the air: Keep the climb angle down and let the model accelerate (remember that!).

Raise the landing gear. After climbing to a safe altitude, feel out the flight controls. Slow the aircraft down a bit, lower the gear and some flaps, and try some shallow turns. Keep an eye out on your fuel and return to the pattern with enough aboard for a few practice approaches, if desired. Fly a standard pattern, lowering the flaps on either downwind or base; don't let the airspeed get too slow. Come back to idle over the threshhold and allow the airplane to settle; hold the nose off and ask your helper if you are down yet! A piece of cake!

If you happen to lose an engine, keep the nose down, full throttle on the good engine. Whatever you do, don't make high angle bank turns or high G turns. Keep everything smooth. Do not use flaps. Lower the landing gear only when you have the landing assured.

Sometimes during take-off, it becomes necessary to over-rotate the nose to break it loose, but remember to lower it to a slight climb altitude. If you keep the nose way up, airspeed builds up very slowly and the airplane will fail to accelerate. It will also cause it to become airborn at a very critical speed, which could result in a stall and crash.

After each and every flight, a good post-flight inspection should be made. Check everything for integrity and look at the fan blades. A small stone or other object can play heck with the blades. if everything looks OK, refuel and fly somoe more!

Wing Construction:

1. Laminate and glue W-1's to W-2's to make up 4 spars. Cut to proper length and mark rib locations.

2. Mark rib locations on W-14 and W-15 after cutting to proper length.

3. Pin bottom spar on plan and add ribs 41-3 through W-13, also braces W-26's to W-31's. Pin leading edge and trailing edge to ribs and add top spar.

4. Drill hole for aileron bellcrank in W-37 and glue in place.

5. Add W-32 and W-33 to ribs for gear blocks. Also W-36.

6. Fit W-16's in place with W-21 and W-22.

7. Remove wing from plans and add W-34 and W-35 gear blocks, if retracts are to be used. if fixed are desired, add G-2, G-3, G-5, G-4, per detail view on plans. Note proper location between W-4 and W-6. Bend up aileron pushrod and install with bellcrank... "

Supplementary file notes

Instructions (decal application).


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Cessna 500 Citation I (oz12073) - model pic

  • (oz12073)
    Cessna 500 Citation I
    from Royal Marutaka
    67in span
    Scale IC R/C LowWing Multi Civil Kit
    clean :)
    all formers complete :)
  • Submitted: 31/03/2020
    Filesize: 1593KB
    Format: • PDFbitmap
    Credit*: PatrickUrbain, MichaelLamonica
    Downloads: 3103

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User comments

I'm looking for the builders manual/instructions for the kit. Can this be uploaded too?
Helipilot01 - 20/02/2021
It's your lucky day :)
SteveWMD - 01/11/2022
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Download File(s):
  • Cessna 500 Citation I (oz12073)
  • Plan File Filesize: 1593KB Filename: Cessna_500_Citation_I_oz12073.pdf
  • Supplement Filesize: 1647KB Filename: Cessna_500_Citation_I_oz12073_instructions.pdf
  • Supplement Filesize: 582KB Filename: Cessna_500_Citation_I_oz12073_instructions_decal_app.pdf
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