Tan-Giro (oz9704)


Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - plan thumbnail

About this Plan

Tan-Giro. Control line gyrocopter sport model.

Quote: "You'll stop the show when you put this spectacular rotary-wing job aloft. In flight it looks just like a big tandem rotor helicopter with lines reminiscent of the Piasecki and Bristol machines. Although the appearance of the model is very close to the double-ended helicopter types it is really more closely related to the gyrodyne family - rotary wing machines which may rise up vertically, like a helicopter, but which depend upon a propeller for forward motion. In this respect it is somewhat similar to an autogyro.

To avoid mechanical complication our model uses a short ground run instead of vertical take-off. With this system it is not necessary to power the rotors and taking off with forward speed is more practical in a controlled model because it keep the lines tight.

Okay, it sound great, but how does it handle? Is it hard to fly? How does it behave in a breeze? The answers are that this model is actually easier to fly than the average sport job. The control response is very smooth and positive and it stays right out at the end of 50 foot lines with any good .19 as high as you'd care to fly any non-stunt type model of this weight, and the wind bothers it less than fixed wing models. There is a barely perceptible cyclic slap from the rotors, but, far from being a nuisance, this gives the "feel" of real rotary wing flying.

You do not require any particular knowledge of rotary-wing craft to build and fly it successfully. Begin with the fuselage which consists of two 3/32 x 3 x 36in sheet sides cut to shape. The bulkheads are 1/8in sheet and the two rotor mast carrying bulkheads should be cut from very hard stock, or else substitute plywood. You will note that the fuselage follows very conventional construction lines for sheet balsa building and requires little or no explanation except at the front end. This model differs from usual controlliners in that the elevating surfaces are at the front end instead of the tail..."

Direct submission to Outerzone.

Supplementary file notes

Plan file includes article pages.


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

Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - model pic

  • (oz9704)
    by Roy Clough
    from Air Trails
    September 1955 
    28in span
    IC C/L
    all formers complete :)
    got article :)
  • Submitted: 15/01/2018
    Filesize: 360KB
    Format: • PDFbitmap
    Credit*: rchopper56

Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - pic 003.jpg
Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - pic 004.jpg
Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - pic 005.jpg
Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - pic 006.jpg
Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - pic 007.jpg
Tan-Giro (oz9704) by Roy Clough from Air Trails 1955 - pic 008.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

This is a fun design, actually Sept of '55. I built this model in the '80s for our C/L club's monthly contest. We had monthly member's contests to expose us to different disciplines of C/L flight such as carrier, racing etc. The month this flew was "the most unusual thing to fly". Rule was it had to take off, fly 7 laps without touching down. One member, an electronics engineer, insisted "it can't fly". It took off, had front rotor hub failure after two laps, and using full "up", completed the flight on the rear rotor in a 45 degree nose down attitude. Our engineer member repeatedly said "I saw it fly but it can't fly". Anyone building this needs to design a more substantial rotor hub. Also, balance the blades as I did not. We learned the lift forces are more than we expected and the advancing/retreating blade forces caused metal fatigue as in the photo. This model exists because it made only that one flight. There is new member interest in auto-giros as evidenced by gallery photos of your Otto the Giro (oz7346) plan. I did not win that month either.
EdShearer - 24/01/2018
A couple of photos of the just built Tan Giro from oz 9704 [more pics 006-008]. Not too sure about this one, so windows and other details will be added after it has flown (or not). I have modified the rotor hubs and blade attachments after reading about the hub failure suffered by a previous builder.
TrevorT - 21/02/2019
Add a comment



Download File(s):


* 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.


Terms of Use

© Outerzone, 2011-2019.

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.