Slope Rhino (oz13877)

 

Slope Rhino (oz13877) by I Anderson 1962 - plan thumbnail

About this Plan

Slope Rhino. Free flight slope soarer model.

Quote: "Slope Rhino, a 36 in span glider for hand launch flight. By I Anderson.

Here's an easy all balsa 'solid' style slope soarer that will surprise you with its ability to reel off two minute flights from any reasonable slope. Prototypes have regularly exceeded this figure.

Wood hardness depends on your prevailing weather conditions at the flying site, use harder wood for the windier weather. The tailplane wood should always be kept light. 3/16 balsa for the wings must be even grained to prevent the CG shifting towards one wing tip.

First carve and sand the wing in three flat pieces to section shown, with a slight reflex at the tips. Sand ends to the right angle, pre-cement (this is important to obtain a strong dihedral joint) and pin out on a flat board with wing tips blocked to 3-1/2 in tip dihedral.

Carve and sand other components to section. Add tailplane to fuselage, then the wing and fins in that order. Reinforce leading edge of wing with thread.

Fill grain with three or four coats of sanding sealer, sanding well with fine grade wet and dry paper between each, then give a final coat of dope or banana oil.

Ballast nose with modelling clay to bring CG to 60 per cent chord approx. Fins are set straight initially; directional trim can be altered later by warping the fins.

When launched from the hill the model should keep pointing directly into the wind, go out into the lift and stay there, gaining height with each gust. If the model gets blown backwards and is obviously too light for the wind, add ballast under the CG until penetration is right. You'll find the Rhino is quite a pleasant beast."

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Supplementary file notes

Planfile includes article.

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Slope Rhino (oz13877) by I Anderson 1962 - model pic

Datafile:
  • (oz13877)
    Slope Rhino
    by I Anderson
    from Aeromodeller
    July 1962 
    36in span
    Glider F/F
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 18/03/2022
    Filesize: 319KB
    Format: • PDFbitmap
    Credit*: Pilgrim

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User comments

I made one in 64 over a summer half term. Flew beautifully with a fascinating flight pattern, tracking along the escarpment at Nympsfield, Gloucestershire. Lost it when a gust took it into an uncut cornfield. Great model. I’ll try to find a picture.
Richard Falconer - 11/06/2022
What does the "horn" do? It appears it would counter act the vertical tail in yaw. Does it reduce side slipping in some way? Thanks
Curious George - 11/06/2022
Really interested in building this design! For those who are more knowledgeable on the subject, could I ask how the design, in particular the fixed front fin, acts to keep the model facing into the wind? Thanks!
Sam - 12/06/2022
The glider uses a simplified version of magnet steering to keep it heading in to the wind. See Mini Magnet (oz8421).
pmw - 12/06/2022
Maybe the forward fin was supposed to simulate, in a small model, the magnet steered gliders from back in the day. Many designs fly very well in spite of their design, not because of it. The original magnet steering was popular when radio control was large and expensive. Reason for the forward fin was because the magnet was too large for the tail. They probably used cow magnets, that's what they look like, adjustable to compass heading to keep the model headed out over the slope. Farmers fed magnets to their cows to attract bits of metal eaten by the cows. Never popular in the USA, most slopes here are infested with inconvenient trees.
Doug Smith - 12/06/2022
Thanks for the link describing the magnet steering. Im sure it is intended to keep the model pointed up wind. But the horn is fixed in a sheet profile fuselage. There must be some other thinking behind it.
Curious George - 12/06/2022
Different use of the magnetic rudder. Such kind of fins are used to add a side fuselage area to a very thin fuselage without enlarging too much the rudder with subsequent tail heavy result and more heavy fuselage/model. Adding side fuselage area increases the maneuverability on yaw axis.
pit - 13/06/2022
I think the explanation is simple. The designer wanted to achieve a wandering flight pattern. If he had omitted the conventional rear fin the model would have been unstable. By retaining it and adding a front fin he retained stability and got the directional randomness to stay in lift.
Best thing is to do what I did and build one!
Richard Falconer - 15/06/2022
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