Curare 60 (oz5527)

 

Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - plan thumbnail

About this Plan

Curare 60. Classic pattern plane for 60 engine.

This here is the Curare 60 as kitted by MK. For the Curare is it appeared in MAN, Dec 1976 with a foam wing see Curare 60 (oz14986).

Note the following text is taken from an article that appeared in RCME, 1977.

Quote: "Curare. Design by Hanno Prettner. Here it is - the model that won the 1977 World R/C Aerobatics Champs at Springfield, Ohio USA.

Wherever aerobatics is discussed, the names of father and son team Hans and Hanna Prettner cannot be left unmentioned. Their outstanding successes, firstly with Super Sicroly (oz9817) and Curare, now presented here, are written into the record books for all to see. Doylestown in 1971 saw Hanno nudge World Champion status for the first time with a fourth place. There was a series of 'one for you, one for me' results on the European contest circuit with Emil Giezendanner and Wolfgang Matt, followed in 1973 by World Championships 3rd place, then 2nd in 1975, culminating in 1st place at Springfield, Ohio in 1977.

It must be said that both the experience gained by Hanno in the European circuit and the sympathetic teamwork of this father/son team contributed in no small measure to their successes! It has often been said that a caller can make or break an acrobatic flier's schedule, the close co-operation achieved between the Prettners weld them into a formidable team.

Teamwork apart, Curare is a supreme precision acrobatic model. Few compromises have been made by the Prettners in design or construction. Each part of this model has been carefully thought out and painstakingly developed to produce a model which aerodynamically and structurally leads the field.

Paramount in order of importance is the ability of the model to 'go where it is pointed' and thus leave the flyer free to decide 'where to point it' and not to continuously feed in control corrections. Considerable care has been taken through progressive modifications to arrive at a model which flies as well in turbulence as it does in smooth air. Minor changes in fin area, the anhedral angle of the tailplane, plus alterations to the wing section have progressively produced a design which grooves to perfection.

The European style of flying, originating in the late 60s and early 70s, of big wide open manoeuvres, coupled with the current FAI aerobatic schedule have made more and more demands on engines to produce large amounts of power, and clean low-drag airframes. High nitro-methane content in the fuel and tuned pipe exhaust systems results in models which are fast flying. Excess speed can become an embarrassment when spins and landing approach are attempted.

Prettner's answer to this dilemma took the form of drag flaps which although not original were first applied in his case to the Super Sicroly. Normal trailing edge flaps, when depressed, have the effect of pitching up the nose of the aircraft. The addition of an extension to the flap in front of the pivot point becomes an upper wing surface spoiler which negates the pitching tendancy induced by the flap. Thus the flaps can be depressed even at full speed with no noticeable alteration in trim but a marked reduction in stalling speed... "

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. Note this file has now been moved to the other listing at Curare 60 (oz14986).

Update 14/12/2020: Added alternate parts file (V2) thanks to Pit.

Supplementary file notes

Article (RCME 1977).
Parts.
Parts V2.

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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - model pic

Datafile:
  • (oz5527)
    Curare 60 
    by Hans Prettner, Hanno Prettner
    from MK
    1975 
    64in span
    IC R/C LowWing Kit
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 26/04/2014
    Filesize: 873KB
    Format: • PDFbitmap
    Credit*: sdad46, HalKarlson, Dries, Pit
    Downloads: 16496

Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 003.jpg
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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 004.jpg
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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 008.jpg
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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 009.jpg
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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 010.jpg
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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 011.jpg
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Curare 60 (oz5527) by Hans Prettner, Hanno Prettner 1975 - pic 012.jpg
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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
I'm looking for a Curare plan.
Allais Rene - 27/02/2020
Then scroll down to the 'download files' section of this page :)
SteveWMD - 27/02/2020
Hello, on the Curare part list I can't find the ribs W13 for the wing and S11 for the stab.
Thanks,
JosephFerrari - 02/12/2020
This here is of course the MK kit plan. Does anyone out there have high res scans of the MAN plan (or indeed the RCME plan?) if so we could usefully create separate listings for those plans. The MAN plan would show rib templates for a hotwired foam wing, rather than the built up wing shown here.
SteveWMD - 16/12/2020
I still have my Curare built 1983 using fibre glass fuse & foam wings. Recently referb & new retracts. Still enjoy flying it regularly.
John - 23/01/2021
Dear Sir, Images of my "Scratch" built Curare 60 with "E" Power [pics 007-011]. Tail dragger in lieu of retract trike for "E" prop clearance. X Power 22cc motor with Castle 90A esc. 6S 5000 HRB Batt. Hi Tech servos, Futaba radio, receiver and Falcon 2 blade 15x8 wooden prop. From NSW, Australia. Best,
Bruce Carr - 14/12/2021
Photo of CURARE 60 [pic 012] and many greetings from Melbeck, Germany :-)
Eggo Fuhrmann - 14/12/2022
Have spilt this into two listings now, thanks to theshadow. See Curare 60 (oz14986) for the MAN version of this plan.
SteveWMD - 14/12/2023
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  • Curare 60 (oz5527)
  • Plan File Filesize: 873KB Filename: Curare_60_oz5527.pdf
  • Supplement Filesize: 2620KB Filename: Curare_60_oz5527_article_RCME.pdf
  • Supplement Filesize: 4007KB Filename: Curare_60_oz5527_parts.pdf
  • Supplement Filesize: 40KB Filename: Curare_60_oz5527_parts_V2.pdf
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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

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