Dinfia IA 45B Querandi (oz8125)

 

Dinfia IA 45B Querandi (oz8125) by Dennis Tapsfield from RCMplans 1996 - plan thumbnail

About this Plan

Dinfia IA 45B Querandi. Radio control scale model twin pusher. For electric power.

Quote: "Having been exploring economical electric flight for the last year or so, I felt that a mid-size twin would be an interesting project, since there is no danger of losing a motor in flight with electrics! The Querandi promised to be a good and unusual subject, i.e., a pusher is more efficient than a tractor, with the bonus that the propellers and motor shafts are protected. Also, using a pair of Speed 400 6V motors driving 5-1/2 x 4 propellers, I could use my standard 7-celI 1400 mA sub C battery pack, therefore not needing any sophisticated charging system, which is another economy. The high wing configuration also makes hand-launching easy. The entire set-up seems to work very well, giving flight times of around 9-10 minutes.

We all know that weight is our enemy with electrics, so building light is essential. Choose your wood with great care; a lot of balsa on sale is far too heavy for our requirements, just say no, and try elsewhere; it is in your interest to buy the best and lightest you can. I built the model as drawn with an all-up ready to fly weight of 48 oz. (3 Ibs.) using standard servos, rx, and a 600 mA receiver battery. The wing loading of around 17 oz/sq ft is very acceptable; the model flies extremely well, has a good climb out, and is quite stable during landing and flare out. The absence of rudder control imposes some restrictions on maneuvers, but not enough to spoil the fun.

If you are interested in building this unusual model, I will give you a few tips on how to proceed, it will not be a 'stick A to B' type of thing, just general information on the methods so that the whole thing comes together in the right order..."

Supplementary file notes

Article pages, text and pics, thanks to hlsat.

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Dinfia IA 45B Querandi (oz8125) by Dennis Tapsfield from RCMplans 1996 - model pic

Datafile:

ScaleType:
  • DINFIA_IA_45 | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz8125) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/DINFIA_IA_45
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Dinfia IA 45B Querandi (oz8125) by Dennis Tapsfield from RCMplans 1996 - pic 003.jpg
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Dinfia IA 45B Querandi (oz8125) by Dennis Tapsfield from RCMplans 1996 - pic 004.jpg
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  • Plan File Filesize: 334KB Filename: Dinfia_IA_45B_Querandi_RCM-1226_oz8125.pdf
  • Supplement Filesize: 1280KB Filename: Dinfia_IA_45B_Querandi_RCM-1226_oz8125_article.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

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.

 

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