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Author Topic: Gaster Gastove Airfoil  (Read 1679 times)
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flydean1
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« on: October 30, 2012, 02:36:24 PM »

I need the co-ordinates for the airfoil used on the Gastove FAI model.  Is it a "standard" airfoil or a one off?

Thanks
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sweepettelee
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Simplicate & add more lightness. Keep sanding!



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« Reply #1 on: October 30, 2012, 03:29:13 PM »

Dean,
I just looked up Gastove in my 55-56 ZAIC YBk. No coords shown.
Bob DeShields has a Gastove(concours beauty award entry, of course, if you know Bobby D).
It flies as fine as it looks.  I bet he just scaled up the sections from the YBk plans.
If he lurks on this forum, maybe he will inform.  Or A.N. Other bod who knows the answer?
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applehoney
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« Reply #2 on: October 30, 2012, 03:48:07 PM »

Gastove was published in MAN and presumbly the fullsize plan is/was available
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glidermaster
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« Reply #3 on: October 30, 2012, 03:49:03 PM »

The Model Airplane News article (June 1956) states '.....a thin heavily cambered section of the Benedek family...'

The MAN plan shows the foils with a grid, rather than coordinates - so it should be easy enough to produce templates (assuming a normal build using all self cut parts is contemplated).

Lee's description of the DeShields model is spot on, of course.
John

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PeeTee
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« Reply #4 on: October 30, 2012, 03:55:30 PM »

Dean

One of the Aeromodeller 3 views talks about a Goldberg section for wing and tail. Here's a copy - with a bit of luck!

Peter

ps I read somewhere that a full size plan is available from the AMA
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glidermaster
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« Reply #5 on: October 30, 2012, 04:03:51 PM »

Interestingly, I had an email from Gaster a couple of years ago (after I had sent him the DeShields picture) in which he states that the fin (of the Gastove Mk.16) was a bit too small.

I guess it would be cheating a bit to sneak a 1/4" or so of extra height on to it???
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Pete R
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« Reply #6 on: October 30, 2012, 04:28:03 PM »

Benedek BE8356B
Exact match for that shown in the Zaic Yearbook
Cheers!
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sweepettelee
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« Reply #7 on: October 30, 2012, 05:54:19 PM »

Pete, etal,
Thanks for ref to Benedek 8356b. I looked it up in John Malkin's Airfoil book and do agree with you.

However, a small historical point of order here.

Notice that I did not use 'BE' prefix as did you.
That is due to general plan and 3-vu usage of "B" as prefix for all Benedek airfoils over the past 50-60 yrs.
We have current confusion with the usage of "BE" for airfoil designation by E Verbitsky and Brian Eggleston.
They both are using "BE" airfoil prefixing, with the usual ?? and head-scratching as to who is the actual creator. 

In fact, Eugene once told me he used Benedek 8% sections, hence, his current "BE" airfoils are closely related
to the Benedek 8356b group.
I hope this adds something to this Gastove info discussion.
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flydean1
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« Reply #8 on: October 30, 2012, 11:17:23 PM »

Well, let's mix things up some more. 

I don't plan on building a Gastove, as excellent an airplane as it is.  I am considering a few Jay's Birds in various sizes to replace my shattered T-Birds.  The plans have a note on them that the airfoil is the same as the Gastove.  None of the plans show the diagonal ribs on the wing tips so I wanted a plot of some kind in order to build the tips to some degree of accuracy.

Thanks all for your replies, and Pete R. for your phone call this afternoon.
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Pete R
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« Reply #9 on: October 31, 2012, 06:37:17 AM »

Lee,
I knew that, I think the confusion comes from the cataloging in the Profili 2 data base, which, in this case is truly confusing. I thoght maybe it was considered current practice.
You're right though.
Mea culpa, mea culpa.
More important is the note that Verbitky airfoils are based on that series.
As a side note to that comment, Reid Simpsom once told me that Verbitsky used the same building form model to model but varied the upper profile to suit his intention.
I don't have any idea if this is really true but it makes sense from an operational standpoint and in any case it makes a great rumor (story?, legend?,etc.).
Cheers!
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FF Bruce
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« Reply #10 on: October 31, 2012, 10:37:10 PM »

Dean have you looked at the "Creep" it has a much thinner airfoil and a good lay out.
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applehoney
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« Reply #11 on: November 01, 2012, 12:57:24 AM »

and it's a good airplane, too
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gossie
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« Reply #12 on: November 01, 2012, 06:41:04 AM »

 Creep with Elfin 2.5.
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flydean1
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« Reply #13 on: November 01, 2012, 09:52:00 AM »

I have looked at the CREEP.  I agree, but the Jay's Bird has the stiffer semi-geodetic structure.  Tired of warps.
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