Qualifier oz10874

 

Qualifier - plan thumbnail image

Qualifier - completed model photo

Submitted to Outerzone: 06/02/2019
Outerzone planID: oz10874 | Filesize: 951KB | Format: • PDFbitmap | Credit*: MarcBird

   

About this Plan

Qualifier. Radio control sport aerobatic model. Wingspan 70 in, wing area 880 sq in.

Quote: "Steve, I remember sending you plans for Jerry Nelson's 1963 Qualifier II (oz5187), but just realized I haven't sent plans for the first 1960 version, simply called the Qualifier. Looks exactly as the photo you have for the Mk II. Main difference I can see, is the original is a tailwheel design and the Mk II is a nosewheel. There are no building instructions for this one, but there is a minimal 'how-to' in the Mk II Supplement download. In those days, it was rather common to have the author say something like, if you're building this one, you should be experienced with building that you're capable of doing it without detailed instructions. Probably to save magazine column space.

According to the Vintage Radio Control Society website, these plans were published in an issue of RCM&E, 1960, no month stated... I had it scanned in PDF form, and greyscale, in an effort to remove as much of the paper's yellowing as I could.

I've wanted to build this one for quite a few years, but didn't have a workbench large enough to handle it. Maybe after I get the workshop room addition built.

Again, Steve and Mary, THANK YOU for doing this service. I can only imagine the time and effort required for accomplishing it. "

Update 06/02/2019 : Added article (later, short article), from RCME Aug 1963) thanks to Pit.

Quote: "The Plan Opposite. Jerry Nelson's Qualifier.

ONE of the interesting people we met at RAF Kenley last August, during the 1962 World R/C Championships was the young Californian Gerald Nelson, whose (model) piloting prowess had already won him a place in the 1963 USA R/C team. (The Americans selected their team early).

Following his preference for a lightly loaded Aerobatic model, Jerry has designed a series of models featuring a large wing, one of which was the Sultan (oz1255). Qualifier represents a lightly loaded streamlined layout using a thin semi-symmetrical wing section as distinct from the fully symmetrical sectioned Sultan which Qualifier actually predates.

Qualifier is a successful competition model. The designer flew it to first place at the 1961 US West Coast Championships, a premier multi event out there and repeated this win in 1962 with a Sultan.

The original Qualifier appeared with a two wheel undercarriage since Jerry prefers this arrangement. However, the American multi aerobatic schedule, which includes a 'touch-and-go' landing, virtually necessitates the use of the tricycle undercarriage fitted later.

Though now considered 'outdated' by strip ailerons, the Qualifier's inset tip ailerons are a pleasing compromise between the docile and over responsive, imparting smoothness yet still effective enough for excellent four-point rolls. Landing technique is to bring the model in low for a flat approach with a little excess speed, then throttling right back to allow it to settle on the runway.

Streamlined proportions limit installation space. Servos are placed in two banks of two down the fuselage. As shown, the receiver compartment is large enough for only a relayless set. But by moving the servos rearward as far as the wing trailing edge line, and re-arranging the fuselage structure at the receiver compartment, a ten channel relay receiver could be accommodated without much trouble.

Modellers interested in obtaining full size plans may do so from the designer, Gerald Nelson, 8638 Patterson Pass Road, Livermore, California, USA. Full size plans for the tricycle undercarriaged Qualifier II appeared in the March 1963, edition of the American publication Model Aircraft World."

Direct submission to Outerzone.

Supplementary files

Article (RCME, Aug 1963).

Corrections?

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

 

oz10874 datafile

Qualifier  
by Jerry Nelson
from RCME
1960 
70in span
Tags: IC R/C LowWing
all formers complete :)
got article :)

 

003.jpg
003.jpg
004.jpg
004.jpg

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

User comments

No comments yet for this plan. Got something to say about this one? Click here to 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.