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1/48 PZL 24 Mirage Hobby + Resin Conversion to PZL 24 E


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So I will start a build progress of the plastic kit with the resin conversion

First fuselage interior

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Most of the interior accessories (pilot seat, control stick, rudder pedals ) are from a resin IAR 81 kit since both aircraft share almost the same fuselage and they look better as from the original plastic kit

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And a little bit of progress....I have added some stiren to fill the gap at the stabilizer joining with fuselage and improved the wing guns with some metal tube

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If you see some masks applied on the fuselage and wings and you wonder why just ignore them....I have just made some measurements

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Finally ready for painting....there is a need for filler to be applied on some places but is ok.... also I have attached the photoetch

 

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It is a common mistake to fill a rather large gap around tailplanes on those Pulawski fighters. DON'T !!!

They were adjustable, changing their angle of attack, and that was a "play space".

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5 hours ago, zigster said:

It is a common mistake to fill a rather large gap around tailplanes on those Pulawski fighters. DON'T !!!

They were adjustable, changing their angle of attack, and that was a "play space".

I didn't know such a thing even from pictures I cant see such a thing.

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48 minutes ago, setal said:

I didn't know such a thing even from pictures I cant see such a thing.

 

Neither did I, her's the PZL.11 in Poland

from http://www.net-maquettes.com/pictures/pzl-p-11/

AGWb-e6BkC7ZGs8CqVSOIcOaAJEOSENotD4H6qzl

 

and from

http://armahobbynews.pl/en/blog/2018/08/11/pzl-p-11c-walkaround-photos/

 

p11c-walkaround29.jpg

 

 

There is a PZL 24 preserved in Turkey, 

1280px-Sole_existing_Pzl_P.24.jpg?155154

just about visible

 

I have a PZL 24 E conversion, can't remember the make as not to hand

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This adjustable stabilizer is a very strange feature because the elevators are already equipped with trim tabs. How this this work? Airplanes usually have elevator trim or stabilizer trim, but not both at the same time.

 

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26 minutes ago, PZL104 said:

This adjustable stabilizer is a very strange feature because the elevators are already equipped with trim tabs. How this this work? Airplanes usually have elevator trim or stabilizer trim, but not both at the same time.

 

the chap on here I think could explain is @Work In Progress

 

the adjustable tailpane is seen on other types, eg Bf109E

Messerschmitt-Bf-109E3-1.JG1-WNr-903-tai

 

less obvious, the Fw190

nasm_fw190_12.jpg

note the + and - markings

 

Apologies to @setal for thread drift, but I hope of interest.

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Even some very basic general aviation aircraft like the Piper Cub feature stabilizer trims, but thoses case there are no (cockpit adjustable) trim tabs on the elevators.

I'm really curious how the stabilizer and the elevator trim are adjusted from the cockpit in case of the PZL 24.

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Bear in mind that I have practically no specific knowledge of the PZL. But since Troy lobbed the ball over the net I shall have a go, soeculatively in the case of the PZL, but working from generally accepted aviation practice.

 

On the face of things, if you have a variable incidence tailplane, which is a very good trim device, then there is no obvious need for a separate trim tab on the elevator. 

The usual method of controlling such a tailplane is an irreversible screw jack, winding the leading edge up and down while the main spanwise load bearing tailplane member (often the trailing edge of the tailplane) pivots in a bearing. This jack in turn is normally controlled by some kind of winding handle or wheel in the cockpit, via a bicycle chain sort of affair, or in a modern type could be electric.

 

However not every tab is a trim tab.

Some are servo tabs, intended to lighten the control by automatically deflecting the opposite direction to the control surface as it is operated.

Some are anti-servo tabs, intended to make the control heavier, by automatically deflecting the same way as the control surface as it is operated. 

You might do this to improve control harmony, especially if the ailerons are a bit on the heavy side (a common early WW2 problem as speeds increased), or if people have shown a tendency to break the thing by pulling a million G at twice the speed of heat (also a common problem in the early monoplane fighter era - higher speeds available and generally less ultimate strength than an externally braced biplane).

 

I notice on that both those PZL-24 elevator pics, the elevator is full down and the tab is also drooping. This is the behaviour you would get with an anti-servo tab. I think there is a good chance therefore that during development of the aeroplane they found the elevators were too light and added that tab to improve the handling. If I am right in this speculation it does not adjust for trim and will not have a cockpit control.

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The resin parts included in the upgrade kit cleaned and prepared for painting.

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I have primed the engine cowl with white and the rest with black for better shading.

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Edited by setal
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