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Old Nov 03, 2012, 12:52 PM
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United Kingdom, England, Keighley
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fowler flap hings

hi there im building a TF 62" p-47 and want to do the flap hing scale. dose any one make a fowler hing thank will work with this kit . not the robart ones

thanks Mick
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Old Nov 03, 2012, 01:18 PM
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United States, MD, Elkton
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As you're aware,Fowler flaps increase wing area,as well as lift/drag.

I recently built a Lockheed Constellation ,and at 1/11th scale,they moved approximately 4 inches.

I don't know of any flap hinges that replicate the Fowlers exactly...but some folks are using a hinge set-up that locates the hinge pin far below the lower surface of the wing.It looks kinda,sorta scale,but leaves a lot to be desired.
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Old Nov 03, 2012, 02:21 PM
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yer not really what im after. a nice scale look and movement is what im after. i think i may have to make my own
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Old Nov 03, 2012, 02:59 PM
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I may be able to find my drawings,but I'm not familiar with the Jug's design...Don't be in a hurry-I'm sure someone will come through with what you need..
We need to find scale drawings first....do you have a Squadron/Signal book ? That's your first need-they'll have scale drawings to work from.
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Old Nov 03, 2012, 03:26 PM
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dont think im in any hurry its taken 2 months to do the vertical stab and the ruder. scale takes alot of time lol
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Old Nov 03, 2012, 03:28 PM
An itch?. Scratch build.
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South Wales U.K.
Joined Mar 2003
13,641 Posts
How about this video -

Fowler Flaps Meister scale P47 Test (0 min 14 sec)
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Old Nov 03, 2012, 03:31 PM
An itch?. Scratch build.
eflightray's Avatar
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Or even - Robart Fowler Flap Hinge 1/5 Scale

A Google on P-47 Fowler Flaps pulls up quite a lot of information, full size and models.
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Old Nov 03, 2012, 03:52 PM
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Quote:
Originally Posted by eflightray View Post
this look interesting just need to try and get hold of him
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Old Nov 06, 2012, 04:45 PM
Rangers Lead the Way
United States, CA, Claremont
Joined Mar 2010
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If it is scale you're after, then Fowler flaps are not appropriate to the P-47. It used Slotted flaps, not Fowlers. That's good news for you, because the Slotted flap mechanism is simple: an opening hinge on the underside allowing an arc deployment. I don't know the TF ARF, but it is probably set up as a simple flap. You can easily modify this to a semi-slotted design by (1) modifying the LE of the flap so that it resembles the LE of a wing and (2) adding a thin strip across the top of the wing TE so that it shields the flap when closed. When open, it creates the slot which directs air up and over the flap.

This type of flap is the second most efficient after fowlers for creating lift (as noted, the fowler actually adds wing area). The Slotted increases lift coefficient 100% in the area of the wing it is located, as compared to 80% for Split flaps and 60% for plain flaps. Slotted flaps require maximum deflection for highest lift of 40deg. - efficiency drop beyond that. Optimal flap size is 25-30% of chord. The slot is most efficient at no more than 5% of flap chord. This last requirement is important: a bigger gap will cause the wing to lose substantial lift.
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Old Nov 06, 2012, 04:59 PM
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You come here for information,you'll get it...TTrotary-thank you for the information you've supplied...
A question has been cleared up(in my case at least)..
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Old Nov 07, 2012, 01:34 AM
Rangers Lead the Way
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Always glad to share what I've learned
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Old Nov 07, 2012, 10:35 PM
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Northwest Oregon
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Quote:
Originally Posted by TTRotary View Post
... Slotted flaps ...
TT:
I am not familiar with slotted flaps. Since I'm very much a visual / pictures kind of guy, any chance you could post a drawing or photo?

TIA
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Old Nov 08, 2012, 12:22 AM
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United States, AZ, Litchfield Park
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You got your work cut out for you, particularly at 1/8 scale.



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Old Nov 08, 2012, 04:21 PM
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Quote:
Originally Posted by CurtissP40 View Post
TT:
I am not familiar with slotted flaps. Since I'm very much a visual / pictures kind of guy, any chance you could post a drawing or photo?

TIA
You probably are: every jetliner has them. Chad's pics are a perfect illustration. If you're not as concerned with scale, hatch hinges make this work very well.
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Old Nov 10, 2012, 06:07 AM
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United Kingdom, England, Keighley
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You have restored my enthusiasm for doing this now. As I was told the Fowler flap is plagued. With slop problems. As it's not a fowler flap I'm sure it's workable
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