Baby Mixmaster

 

Baby Mixmaster - plan thumbnail image

Baby Mixmaster - completed model photo

Baby Mixmaster  
by George Kanakos
from Model Airplane News
July 1947 
40in span
Tags: Rubber F/F Pusher
all formers complete :)
got article :)


This plan was found online 01/12/2011 at: http://www.rcgroups.com/forums/showpost.php?p=20015183&postcount=7240
Outerzone planID: oz1899 | Filesize: 244KB | Format: • PDFbitmap | Credit*: 50+AirYears

   

About this Plan

Baby Mixmaster - rubber pusher model with contra-rotating props. July 1947 MAN.

Quote: "Do you want more speed plus stability and complete elimination of torque? Well, here is the answer in a contra-rotating prop arrangement for rubber powered models. As we all know, torque is an important factor in designing models. With torque eliminated, model building is a pleasure and flying is a greater pleasure. This model was designed after gaining experience on contra-rotating prop arrangements as applied to gas powered models.

In designing this model and the contra-rotating prop arrangement, I had to contend with weight which I have kept to the minimum. The completed model weighs 5 oz. Taking into consideration the ball bearings, flanges, plugs and tub-ing, this is very light indeed. Although this model was not designed for endurance, it is far from a short distance flyer as your test flights will prove. In three different tests, with only 150 turns, my model averaged over 200 ft at about fifty feet altitude and flew in a very stable manner at high speed. Using 1/8in flat rubber (12 strands), maximum turns should be 200 and care should be taken not to exceed this limit until you are sure of your rubber.

This model is of very simple construction and should give little trouble in building. The contra-rotating mechanism may appear a bit difficult, but upon closer examination you will find that it is a simple affair. All parts such as flanges, bearings, tubing and the shaft, which is 1/8in drill rod, are of standard make and can be purchased at low cost.

Fuselage construction: Start in the usual manner by laying out the two sides and allowing them to dry thoroughly. Then remove from drawing board and add top and bottom crosspieces as shown on drawings. The dimensions at each station, both on side and top views, show the distance from outer edge of the longeron to centerline of the fuselage. Thus, to get the full size for the uprights, add the dimensions on top and bottom and subtract double the thickness of the longerons. The next step is to shape a nose block as illustrated from solid stock. The tail block is carved in same manner as nose block, and both are sanded to a fine finish..."

Update 10/01/2018: added article, thanks to RFJ.

Supplementary files

Article.

Corrections?

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

 

User comments

Hello, while searching around I found this plan and would love to build it, because it definitely looks like it's designed for a counter rotating prop system. Unfortunately there is no information about it on the plan. Does anyone have the July 1947 MAN article to go with it ? Thanks.
Jeff - 09/01/2018
The article is now available, Jeff [supplementary file]. RFJ to the rescue, once again :)
Mary - 10/01/2018
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.