Powavan (oz6796)

 

Powavan (oz6796) by JR Vanderbeek from Frog 1950 - plan thumbnail

About this Plan

Powavan. Free flight power duration model.

Review Quote: "Good grade balsa and hardwood parts, with ready shaped leading and trailing edges, and every sheet part die-stamped with perfect accuracy, make this a kit of Al quality.

Completeness. Apart from the need to supplement the supply of cement, the kit is complete to the finest detail. Even the elastic bands for assembly of the completed model, and tiny woodscrews for holding the alloy cowling, are supplied.

Ease of Assembly. Frog kits are so near to being completely prefabricated that we might expect the instructions to read 'shake the box in the left hand, squirt cement with the right, and the kit will assemble itself'. We found the Powavan almost as simple as that to build. We say almost because this model is made from what appears to be literally hundreds of component parts. Halfway through construction, which takes longer than average for a 48 in contest job, we began to wonder if the dozens of pieces that go to make the fuselage were really necessary!

However, our patience won through, and though our test model exceeded the specified 13 oz by 3 extra oz, we were satisfied that we had a virtually indestructible model. In fact, when on test it landed, without intent, on the Managing Editor's office roof with a resounding crash usually indicative of a write-off, the only damage was a smashed celluloid wheel which had taken most of the impact.

Powavan is not for hasty builders, it is a model for those who enjoy building as much as high performance flying.

Instructions Are without fault and key perfectly with numbered parts shown on the plan. The flying instructions are unique in that they describe exactly the best method of trimming. Value is 100 per cent.

Flying. Fitted with a Frog 100, driving a Frog 8 x 6 prop, the test model was put through all forms of trim; but the advised straight climb, and left-hand glide turn, proved best with regular still air ratios of between 6:1 and 9:1. This may sound a trifle far-fetched for a contest model with a 9 oz/sq ft wing loading, and a power loading as high as .07 bhp/lb, but the ability of the Powavan to sustain a steady near-vertical climb, without the slightest tendency to stall, is something which calls for greater study of this unusual high thrust-line layout..."

Direct submission to Outerzone.

Update 03/11/2018: Added kit review, from Aeromodeller April 1951, thanks to RFJ.

Supplementary file notes

Review.

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Powavan (oz6796) by JR Vanderbeek from Frog 1950 - model pic

Datafile:
  • (oz6796)
    Powavan
    by JR Vanderbeek
    from Frog (ref:667KP)
    1950 
    48in span
    IC F/F Kit
    formers unchecked
  • Submitted: 25/06/2015
    Filesize: 836KB
    Format: • PDFbitmap
    Credit*: AugustaWest

Powavan (oz6796) by JR Vanderbeek from Frog 1950 - pic 003.jpg
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Powavan (oz6796) by JR Vanderbeek from Frog 1950 - pic 004.jpg
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Powavan (oz6796) by JR Vanderbeek from Frog 1950 - pic 005.jpg
005.jpg
Powavan (oz6796) by JR Vanderbeek from Frog 1950 - pic 006.jpg
006.jpg
Powavan (oz6796) by JR Vanderbeek from Frog 1950 - pic 007.jpg
007.jpg

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User comments

Powavan from original plans, powered by PAW 09. Home in Sweden [pics 006, 007].
Jim Lindqvist - 09/02/2021
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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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