Robbe Progo. Radio control trainer model. Wingspan 1280mm. For 3.5 - 7.5cc engines.
Quote: "General information on Progo. Simple, rapid construction - thanks to the prefabrication of all components - and excellent, docile flying characteristics: these factors make Progo an ideal first model, or for advanced training for experienced pilots. This high quality is based on many innovations, new industrial manufacturing methods, and functional design of all parts.
The special feature of this ultra-complete kit is the pre-finished Robbe Plura fuselage, moulded in one piece in high quality thermo-plastics material. It has an outstanding ability to withstand mechanical and thermal stress. The fuselage material can be glued with virtually all normal adhesives, and accepts all the usual paints used in modelling. The fuselage is presented in a finished state, ready for fitting out, cutting possible building errors to the minimum. Another special feature is the Robbe Siros wing panels, which are capable of absorbing high flight loads. They are supplied in an advanced state, and require a minimum of work to complete. The wing can be built with or without ailerons.
The prefabricated combination 'motor bulkhead/motor mount' also counts as a practical, time-saving innovation. The two-part motor bulkhead is provided with a moulded-in tank holder, which guarantees precise location of the 250 cc clunk tank. The motor mount, which is screwed to the motor bulkhead, is designed to locate the standard fixed double-leg nose unit, and also features a moulded-in holder for a steerable nose wheel.
The strutted main undercarriage cannot swing out of line on taking off from the ground, and thus ensures excellent tracking.
Progo's appearance can be made even more semi-scale by fitting the undercarriage fairing set (Order No 32203. This also reduces the drag of the wheels.
Progo can be steered by rudder alonelor ailerons. The elevator and rudder controls are gentle in response, and this allows you to make the occasional wrong command without an instant reaction, like a highly-strung movie star. The model has a high degree of inherent stability and will recover from pitch oscillations by itself, provided that enough height is available. As a trainer, a 3.5 cc IC motor is adequate, eg the Robbe Enya 21X.
The model's full potential is realized with a 6.5 to 7.5 cc motor. If equipped with aileron control, Progo is then fully aerobatic. The good-natured flying characteristics are retained regardless of the motor fitted... "
Quote: "Hello Steve and Mary, in attach you can find the plans for the Robbe Progo. It is merely assembly instruction because the kit came with a premoulded fuselage and ready to cover wings."
Direct submission to Outerzone.
Kit instructions, in German and English (20 pages).
Did we get something wrong with this plan? That happens sometimes. Help us make a correction
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
* 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, 2011-2018.
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.