Curare 60

 

Curare 60 - plan thumbnail image

Curare 60 - completed model photo more pics (1)

Curare 60  
by Hans and Hanno Prettner
from Kato Model Aircraft
1975 
64in span
Tags: IC R/C
all formers complete :)
got article :)


Submitted to Outerzone: 26/04/2014
Outerzone planID: oz5527 | Filesize: 873KB | Format: • PDFbitmap | Credit*: sdad46

   

About this Plan

Curare 60 - Classic pattern plane.

Quote: "The Curare that won the 1975 Tournament of Champions and the $10,000 award. BY HANS AND HANNA PRETTNER. Continuing MAN's philosophy of the best we present the efforts of this famous father/son team who have made a career of winning most, if not all, pattern championships!

We feel that the ultimate model design for international R/C aeromodeling competitions is the Curare. An extensive amount of research and testing has been accomplished over the last few years to develop the Curare design into what it now is. Our previous design Super Sicroly II (oz9817) is the basis of the Curare. Several design parameters of the Sicroly design have been retained, notably the elegance with which maneuvers can be performed. The Curare features improved crosswind performance and extreme smoothness in gusty high wind conditions. There is very little difference flying the Curare in windy or calm conditions. A pilot can fly the model through the FAI program or any other combination of maneuvers and not have to worry about correcting every maneuver, leaving time to perform exact maneuvers.

My answer to exact flying is straightforward. A pilot can only achieve round symmetrical figures when he can concentrate fully on performing the maneuver and not on correcting for aerodynamic errors just to be able to complete the maneuver. The result is not a compromise, but is a Curare!

This assurance is established by our many wins and top placing in world cham-pionships and international competitions from Las Vegas to the European meetings.

The Curare (Curare is a poison used by the South American Indians on their arrow tips) in the hands of a top flyer is a fast piece of quite wonderful ammunition. Equipped with a Webra 61 Speed and Webra's tuned pipe silencer system very high speeds can be obtained with a low noise level of 78 db. A Simprop 7 channel contest radio is used because very high per-formance is required as well as three additional channels. Extra functions are retractable landing gears (MK type), combination dive brakes and flaps, and mixture control plus wheel brakes. Retractable landing gears should be used in order to obtain full advantage of the aerodynamic qualities of the Curare. Also highly desirable is the combination dive brakes and landing flaps as shown on the plans. The excellent low speed performance of the Curare is further improved with the flaps. This is very important when flying off grass strips so the touch down speed is at a minimum to reduce any possibility of damaging the retractable landing gear mechanism. The flaps also stabilize low speed flight.

A new wing and stabilizer airfoil is utilized as well as a new idea in stabilizer dihedral. We are always being asked about the negative (anhederal) dihedral in the stabilizer. Many tests were performed to perfect the new design concept. It was found that the airfoil of the stabilizer was very critical otherwise opposite results were obtained. Wind tunnel tests showed that op-timum stability under every weather condition could be obtained with the new system. Optimum low and high speed performance are now obtained..."

Direct submission to Outerzone.

Update 09/02/2015: Added parts file (18 pages complete, includes 3 assembly drawings) thanks to HalKarlson.

Update 13/03/2018: added additional article (Model Airplane News, December 1976), thanks to RFJ.

Supplementary files

Article pages, text and pics (from RCME 1977) thanks to Dries. Also parts file (18 pages). MAN article.

Corrections?

Did we get something wrong with this plan? That happens sometimes. Help us make a correction

 

User comments

Are we missing a sheet which is for the rib cross sections for Wing and Tailplane
anon - 30/01/2015
Added a photo of completed model [more pics 003], thanks to OlafP.
Mary - 17/02/2018
Add a comment

 

Notes

* 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.

Scaling

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.

 

Terms of Use

© 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.