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YAK-23 Flora "Як-23" build - 11/21/2012 6:41 PM   
czirh



Posts: 57
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From: Bodrum, TURKEY
Status: offline 		My new Project: YAK-23 flora Яковлев Як-23

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< Message edited by czirh -- 11/27/2012 9:26 AM >

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RE: YAK-23 Flora "Як-23" build - 11/21/2012 6:46 PM   
czirh



Posts: 57
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From: Bodrum, TURKEY
Status: offline 		Drawings,,

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RE: YAK-23 Flora "Як-23" build - 11/21/2012 6:59 PM   
ByLoudDesign



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From: Mesa, AZ, USA
Status: offline 		Cool project, what scale. Is it going to br EDF or turbine? I love to see designers doing the not so common models. I shy away from models that have been done before unless I am taking them to a larger scale! Hope to see more as you progress. My projects currently are Bell Boeing V-22 Osprey [1:6 scale] and the F + W C3603 Firefly [1:5 scale]

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Kits: F11C-2 1:4, Do-24T 1:8, P-3 1:10, Howard 500 1:5, XFY-1 1:4, SR-9 1:4, V-22 1/6, B-25J 1:4, F+W C3603 1:5

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RE: YAK-23 Flora "Як-23" build - 11/21/2012 6:59 PM   
dubd



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Status: offline 		That is one very interesting looking plane. What scale will yours be?

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RE: YAK-23 Flora "Як-23" build - 11/21/2012 11:26 PM   
Nhalyn



Posts: 349
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From: Paris, FRANCE
Status: offline 		This a great subject and a winner in flight !

Please have a look at this one :

This one was made by a good friend, full scratch build, full molded (fiberglass + herex), Jetcat P140RX inside, and I can't remember the scale but its around 2.20m wingspan.

This is a real winner and a real trainer in flight.

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RE: YAK-23 Flora "Як-23" build - 11/21/2012 11:52 PM   
Ram-bro


 

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From: Bennington, NE, USA
Status: offline 		nice Gen 1 jet and lousy photography....lol. I think I remember a set of plans in MAN at one time

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RE: YAK-23 Flora "Як-23" build - 11/22/2012 12:14 AM   
Nhalyn



Posts: 349
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Joined: 10/8/2010
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From: Paris, FRANCE
Status: offline 		Yeah, I know, it's a poor video , but it was the first flight and last of thing we were concentrated on was the video and the new camcorder...

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RE: YAK-23 Flora "Як-23" build - 11/22/2012 1:04 AM   
Knock



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Status: offline 		Crack cocaine and video cameras ....never a good mix.


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RE: YAK-23 Flora "Як-23" build - 11/22/2012 2:09 AM   
Ram-bro


 

Posts: 4966
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Status: offline 		hey its not a problem with the video, rather have something raher than nothing

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RE: YAK-23 Flora "Як-23" build - 11/22/2012 3:45 AM   
Mark 5


 

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Status: offline 		Great flying airplane, but it sure is fugly!

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RE: YAK-23 Flora "Як-23" build - 11/22/2012 8:59 PM   
czirh



Posts: 57
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Joined: 5/12/2008
Last Login: 6/10/2013
From: Bodrum, TURKEY
Status: offline 		Thank you all comments.. :-)

Engine: P-100
I think ws: 230 - 240cm ?
construction fuselage: balsa, polywood, fiber+epoxy ; wings: foam+balsa+fiber and epoxy

Cem

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RE: YAK-23 Flora "Як-23" build - 11/22/2012 9:01 PM   
czirh



Posts: 57
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From: Bodrum, TURKEY
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quote:

ORIGINAL: Nhalyn

This a great subject and a winner in flight !

Please have a look at this one :

This one was made by a good friend, full scratch build, full molded (fiberglass + herex), Jetcat P140RX inside, and I can't remember the scale but its around 2.20m wingspan.

This is a real winner and a real trainer in flight.


Thank you for the commend and video.. :-)
Have a second video?

Cem

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RE: YAK-23 Flora "Як-23" build - 11/22/2012 11:47 PM   
Nhalyn



Posts: 349
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Joined: 10/8/2010
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From: Paris, FRANCE
Status: offline 		No sorry, we do not have make an other video, but the plane is still flying faboulousely !

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"You''''ve never been lost until you''''ve been lost at mach 3 !" (a test pilot of the SR-71)

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RE: YAK-23 Flora "Як-23" build - 11/26/2012 6:50 AM   
czirh



Posts: 57
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Joined: 5/12/2008
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From: Bodrum, TURKEY
Status: offline
quote:

ORIGINAL: Nhalyn

No sorry, we do not have make an other video, but the plane is still flying faboulousely !


Good morning,

I am also building the same model. İs it possible to contact your friend about some questions :

1. CG?
2. Any additional suggestions/warnings about maiden flight (trim) and building process?

Merci beaucoup
Cem


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RE: YAK-23 Flora "Як-23" build - 11/26/2012 8:52 AM   
Nhalyn



Posts: 349
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From: Paris, FRANCE
Status: offline 		Hi Czirh,

I have your informations.

CoG is as usual for this plane : its a no-sweep back wing, with correct sized horizontal stabilizer with correct fuselage length. So no particularity here, there is lots of calculation tables to ensure a correct CoG. You can use the same % values than other "look like" jets.

For tips about this plane I see at least two of them:
- ensure a correct heat protection of the down surface of the fuselage. It's hot here during startup and engine stop procedure.
- be aware of a pitchup effect when applying full power, as the engine is way below the CoG. On this plane we have a mix engine to elevator to control that (10% down elevator by memory) Changing the angle of the engine in the plane should have very low effect to change that, so we kept the engine with 0° angle.
- this plane should not be overpowered for the very same reason of engine effects. It's an old classic jet from the same time of MIG 15, MIG 17, and other that were very low powered. This is not a problem as the plane is very stable and simply to fly, but you have to be aware of that.

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"You''''ve never been lost until you''''ve been lost at mach 3 !" (a test pilot of the SR-71)

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RE: YAK-23 Flora "Як-23" build - 11/26/2012 11:26 AM   
F86_SABRE


 

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Status: offline 		Would be interesting to know if the turbine will be angled or not.

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RE: YAK-23 Flora "Як-23" build - 11/27/2012 9:14 AM   
czirh



Posts: 57
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Joined: 5/12/2008
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From: Bodrum, TURKEY
Status: offline
quote:

ORIGINAL: F86_SABRE

Would be interesting to know if the turbine will be angled or not.


I am planning 1,5-2 degrees angled.

My design trainer jet Canary is 2 degrees turbine down angled.

https://www.youtube.com/watch?feature=player_embedded&v=gL3-J23wx_k#!

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RE: YAK-23 Flora "Як-23" build - 11/27/2012 9:20 AM   
czirh



Posts: 57
Score: 100
Joined: 5/12/2008
Last Login: 6/10/2013
From: Bodrum, TURKEY
Status: offline
quote:

ORIGINAL: Nhalyn

Hi Czirh,

I have your informations.

CoG is as usual for this plane : its a no-sweep back wing, with correct sized horizontal stabilizer with correct fuselage length. So no particularity here, there is lots of calculation tables to ensure a correct CoG. You can use the same % values than other ''look like'' jets.

For tips about this plane I see at least two of them:
- ensure a correct heat protection of the down surface of the fuselage. It's hot here during startup and engine stop procedure.
- be aware of a pitchup effect when applying full power, as the engine is way below the CoG. On this plane we have a mix engine to elevator to control that (10% down elevator by memory) Changing the angle of the engine in the plane should have very low effect to change that, so we kept the engine with 0° angle.
- this plane should not be overpowered for the very same reason of engine effects. It's an old classic jet from the same time of MIG 15, MIG 17, and other that were very low powered. This is not a problem as the plane is very stable and simply to fly, but you have to be aware of that.


Thank you very much for your time and hints..

Salut :-)

Cem

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RE: YAK-23 Flora - 11/27/2012 10:16 AM   
F86_SABRE


 

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From: Malta, MALTA
Status: offline 		Hi Czirh,
Thanks for the explanation. Do you see any difference in pitch angles when you increase or decrease power?

Reuben

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RE: YAK-23 Flora - 11/27/2012 10:40 AM   
Nhalyn



Posts: 349
Score: 115
Joined: 10/8/2010
Last Login: 6/18/2013
From: Paris, FRANCE
Status: offline 		As the engine axis is far below the vertical position of CoG (around 10cm or 4in) , you can't avoid to be subject to "effect" when you apply or reduce power, whatever is the angle of the engine.

There is the very same problem with gliders, jet powered or electric powered over the wing with retracting pylon : you have always a great pitch down effect when applying power, whatever the angle. You can only reduce the effect, not make it dissapear...

Salut !

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RE: YAK-23 Flora - 11/29/2012 5:18 PM   
czirh



Posts: 57
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Joined: 5/12/2008
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From: Bodrum, TURKEY
Status: offline 		My workshop, Pinto and my new runway.. :-)

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RE: YAK-23 Flora - 11/29/2012 5:43 PM   
czirh



Posts: 57
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From: Bodrum, TURKEY
Status: offline 		My turbine p-100..

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RE: YAK-23 Flora - 12/1/2012 3:20 PM   
czirh



Posts: 57
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From: Bodrum, TURKEY
Status: offline 		Fuselage formers..

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RE: YAK-23 Flora - 12/5/2012 7:48 PM   
czirh



Posts: 57
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From: Bodrum, TURKEY
Status: offline 		YAK-23 flora, F-9 Panther and Pinto..

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RE: YAK-23 Flora - 12/6/2012 6:46 PM   
czirh



Posts: 57
Score: 100
Joined: 5/12/2008
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From: Bodrum, TURKEY
Status: offline 		Does this aircaraft have airbreak?
Thank you.

Cem

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