About this Plan
Callisto. Radio control sailplane model. Wingspan 100in, wing area 843 sq in. Airfoil is Eppler 193.
Quote: "If you want a high-performance RC Sailplane, this one is for you. It takes the configuration of current F3B designs and combines that with a lightweight and strong structure for AMA-type contests in the Modified Standard class. It's a winnner!
SAILPLANE DESIGNS for Thermal Duration events in the U.S. have not changed dramatically in the last several years. Subtle im-provements in airfoil shape, lower drag, etc., have appeared, but the predominant basic design is still the floater type with polyhedral and controls of rudder and elevator. However, in other parts of the world, mainly Europe, large ad-
vances in FAI F3B Sailplanes have recently occurred. F3B Sailplanes are generally built stronger and heavier (to survive the Speed task) than what is used for Duration competition. Attempting to com-pete with an F3B plane in a Dura-tion event against a floater type often results in the floaters turning in better times under light air conditions.
The Callisto is a Sailplane of the F3B configuration, but with a wing loading comparable to current Standard-class planes. The prototype has a 7.26 oz / sq ft wing loading. The plane utilizes coupled ailerons and rudder, a T-tail stabilator, and spoilers for speed control. It has a built-up fully-sheeted wing (resulting in exceptional strength) and a smooth airfoil.
Drag has been kept to a minimum by using a slender fuselage, thin tail surfaces, and smooth contours.
Ballast tubes are incorporated in the wing. Ballast loading is accomplished through the spoiler bay; thus the wings do not have to be removed for changing ballast. One set of ballast tubes holds 39 oz of weight. A second set can be built to double the capacity.
Flight performance has been better than ex-pected. Maneuverability with the coupled ailerons and rudder is a vast improvement over conventional controls. The turning response is immediate with no lag time..."
Callisto, Model Aviation, October 1982.
Direct submission to Outerzone.
Supplementary file notes
Article pages, thanks to RFJ.
Did we get something wrong with these details about this plan (especially the datafile)?
That happens sometimes. You can help us fix it.
Add a correction
Do you have a photo you'd like to submit for this page? Then email email@example.com
User commentsNo comments yet for this plan. Got something to say about this one?
Add a comment
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
© Outerzone, 2011-2020.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.