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Old Aug 07, 2012, 08:36 AM
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The windy west coast of Sweden
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"Silver-Måsen" by Sigurd Isacson

Unfortunately I have no facilities to scan larger plans. Posting photos is a lot better info than none at all, though...

Today I received the plan of an interesting old Sigurd Isacson design, "Silver-Måsen" (that's "Silver Gull").
Wing span ≈ 27"
Year of design: 1952
In many ways a classic, sleek "cabin' of its time, although not entirely "mainstream" either...

Mr Isacson had a fascination with wing sections....note this one (see below), with its turbulence wire + a recess right behind it....

As so often seen with Isacson designs, optional floats & skis are shown on plan.


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Last edited by Gluehand; Aug 07, 2012 at 12:50 PM. Reason: Added year of design
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Old Aug 07, 2012, 08:46 AM
flight999
England
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Thank you Gluehand. It's rather nice.
Looking at the airfoil in fact it almost has a double turbulator with the
leading edge being shallower than the rib as drawn.
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Old Aug 07, 2012, 01:26 PM
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Interestingly:
The 1951 forerunner of "Silver-Måsen" is shown HERE, in the "Jetex-thread"...

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Old Aug 07, 2012, 04:46 PM
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"Silver-Måsen" by Sigurd Isacson picture by gluehand.

Assuming span is the 690mm on the plan here she is fullsized. not perfect but certainly buildable from.

UPDATE Gluehand states True span on plan is 716 mm x 2 (half span 358 mm) so have replaced original PDF with updated one using Gluehands stated measurements.

just a bit of info for those with plans and no scanning facilities a good digital photo can often be scaled up to full size if the resolution is good enough. If the file is to large to post I am always willing to see what I can do with it and return for you to post.

Silver-Masen was at 72dpi.. As the full size model is quite small it can be scaled to full size OK. 300dpi is always best as the minimum dpim were possible.
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Last edited by aeromeddeler; Aug 07, 2012 at 07:25 PM.
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Old Aug 07, 2012, 06:05 PM
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Quote:
Assuming span is the 690mm on the plan here she is fullsized
Hi,

The 690 mm is the stated span, "on the box lid".....
Here's some correct info to work on

True span on plan is 716 mm x 2 (half span 358 mm)
Chord is 95 mm.

Stab is 285 x 74 mm


Regards,
Bosse

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Old Aug 07, 2012, 07:27 PM
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Quote:
Originally Posted by Gluehand View Post
Hi,

The 690 mm is the stated span, "on the box lid".....
Here's some correct info to work on

True span on plan is 716 mm x 2 (half span 358 mm)
Chord is 95 mm.

Stab is 285 x 74 mm


Regards,
Bosse

have rescaled the PDF to your measurements.
after all your the Bosse (sorry could not resist English hunour at its worst)
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Old Aug 08, 2012, 10:10 AM
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Quote:
Originally Posted by aeromeddeler View Post
have rescaled the PDF to your measurements.
after all your the Bosse (sorry could not resist English hunour at its worst)
Aargh...curiousity makes me self-combust......please enlighten me (PM, should it be "less family friendly") !
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Old Aug 09, 2012, 06:32 AM
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Quote:
Originally Posted by Gluehand View Post
Aargh...curiousity makes me self-combust......please enlighten me (PM, should it be "less family friendly") !
that should have been english humour

When told to do something either which you think can wait or is not quite right (especially by the better half) the normal response is "OK your the boss"

your name being Bosse just made think of the phrase.
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Old Aug 09, 2012, 01:34 PM
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Enlightened..! Thx!

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Old Aug 14, 2012, 05:20 PM
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Soulles Normandy France
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Few more from Model Aircraft magazine. Seems only one plan per magazine during this period in its publication.

Model Aircraft April 1959

Mad`s Dream 63" span A2 Glider.

Model Aircraft July 1959

Avro Athena 20" span scale C/L features hollow log construction

Model Aircraft September 1959

Whippet 17.5" span nice looking RTP semi scale Biplane
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Old Aug 15, 2012, 02:32 AM
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Thanks for all the nice plans. I download all the scale plans.

I was wondering if RTP stood for Ready to Please I don't know that acronym, seriously speaking.

Bulent
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Old Aug 15, 2012, 02:49 AM
flight999
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RIP = Rest in peace.
When you are dead that is.
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Old Aug 15, 2012, 02:51 AM
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Quote:
Originally Posted by bmutlugil View Post
Thanks for all the nice plans. I download all the scale plans.

I was wondering if RTP stood for Ready to Please I don't know that acronym, seriously speaking.

Bulent
Hi Bulent,

RTP means 'Round The Pole' a form of tethered flying usually indoors where the model is powered by an electric motor getting the current from the base of the 'pole' and via wires to the model itself so that there is no need for the model to carry the power supply of batteries etc.

Regards

BrianG
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Old Aug 15, 2012, 04:33 AM
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Thanks, I remember now. That technique must be dead and gone (DAG) by now

I wonder if any electric CL models are flown, it is easier now with the new batteries. That assuming CL is still flown - I guess it is mostly dead in this country.

Bulent
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Old Aug 15, 2012, 05:30 AM
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Bulent, I am awaiting the arrival of an electric motor from Hong Kong to convert a C/L Nobler to electric.
I am going to use my R/C gear to control the motor only so I can fly the model by myself and not have to have a helper to hold it for me.
Also I will be able to shut the motor down when I start getting too dizzy which is bound to happen as I haven't flown C/L for about 50 years.
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