Auster B4 Ambulance (oz5268)

 

Auster B4 Ambulance (oz5268) by AA Stowell from Aeromodeller 1953 - plan thumbnail

About this Plan

Auster B4 Ambulance. Scale model for diesel power. A 1/8 scale model for radio control or free flight with 1.5 - 2.5cc diesels.

Quote: "An 1/8 scale model for radio control or free flight with 1.5 to 2.5 cc diesels. Auster B4 Ambulance Freighter, by AA Stowell.

WHEN the Auster Ambulance made its debut two years ago, many an ardent scale fan expressed the opinion that here, at last, is the ideal subject for scale radio control. But the Auster B/4 is not all that easy to reproduce to perfect scale and remain a reliable flier, as several modellers have already discovered. The near symmetrical scale wing section is one detail that has to be modified to Clark Y or similar, and of course, the dihedral must be increased slightly.

Here, in Mr Stowell's model, we have the ideal mean. A scale model blended with practical design, and a grand radio design at the same time. Portability has been considered, as will be seen in the two photos below, and silk, nylon or rayon covering advised as an aid to increased strength. Wing and wing struts are rubber tensioned and 'knock-off-able'.

The original flew both free-!light and under radio control with ECC 951 'A' receiver. It used a Mills 1.3 cc diesel and ED 7-3/4 x 6 in prop, but at 45 oz all-up weight, it could easily show improved performance with a 1.5 or 2 cc engine. Like the full-size aircraft, right thrust of up to three degrees is advisable to cure a natural turn to the left; though this scale model retains the original fluster fin and rudder, which has been altered considerably on the latest version of the real Ambulance, G-AMKL.

Building the wings and tail is a straightforward procedure, needing little extra explanation other than at the centre section. It will be seen that the dihedral actually starts at the fuselage centre line, leaving the two root ribs at the hinge joint at 90 degrees. The photo below left, explains the scheme in general, and also displays the detachable portion of the rear fuselage which is very handy for accessibility. As will be seen on the drawing, the radio receiver is best placed in the aft half of the fuselage, and it can then be reached either through the rear or the roof.

The fuselage is made by first assembling the basic 1/4 sq side, continuing the bottom longeron to F2. Build up with main formers, add bearers, and cut away longeron so that the complete undercarriage assembly on the ply base, can be fitted. Then add sheet bottom, and start tailboom with the base. Cement F7, F9 in place, add top, add spacers and when dry, attach firmly to the fuselage which is then sheeted over with 1/16. It is hardly necessary for us to emphasise the importance of this boom/fuselage joint. "

Direct submission to Outerzone. Note this plan file is 400 dpi and well over 4MB. If anyone can clean this up by removing the hatched background to make both it clearer to read and also a smaller filesize, I would be very grateful. Thanks, Steve.

Update 24/01/2014: Added supplement CAD re-drawn version of this plan, thanks to hogal.

Update 29/01/2014: Replaced this plan with a much clearer version (hatching removed) thanks to RogerClark.

Quote: "Steve, Here is a 'traditionally restored' version of Plan 5268 Auster B4 Ambulance, to complement Hogal’s excellent CAD plan"

Update 04/10/2017: Added PDFvector plan tracing, thanks to hogal.

Supplementary file notes

Article pages.
PDFvector plan tracing.

CAD file

This plan is available for download in CAD format.

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Auster B4 Ambulance (oz5268) by AA Stowell from Aeromodeller 1953 - model pic

Datafile:
  • (oz5268)
    Auster B4 Ambulance
    by AA Stowell
    from Aeromodeller
    November 1953 
    55in span
    Scale IC F/F R/C Cabin
    all formers complete :)
    got article :)
  • Submitted: 21/01/2014
    Filesize: 1042KB
    Format: • PDFbitmap • PDFvector • CADfile
    Credit*: BrianCox, hogal, RogerClark, hogal

ScaleType:
  • Auster_B.4 | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz5268) 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/Auster_B.4
    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.

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Download File(s):
  • Auster B4 Ambulance (oz5268)
  • Plan File Filesize: 1042KB Filename: Auster_B4_oz5268.pdf
  • Supplement Filesize: 234KB Filename: Auster_B4_oz5268_article.pdf
  • Supplement Filesize: 216KB Filename: Auster_B4_oz5268_vector.pdf
  • CAD Zip Filesize: 376KB Filename: Auster_B4_oz5268_cad.zip
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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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