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ARIXTRA Build Thread by ISAAC NAJARY

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ARIXTRA Build Thread by ISAAC NAJARY

Old 04-26-2013, 10:18 PM
  #301  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

This was a awesome build thanks Issac for sharing the details of model
Old 04-27-2013, 07:43 AM
  #302  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY


ORIGINAL: villalbi2003

hi Isaac
what kind of clear coat do you use?
i use acrilic color for paint but i have some problem with clear coat,
normally the type used for cars are very heavy and diffucolt to apply.
thanks in aadvance for any tips about this question.
regards
Alberto
Hi Alberto,

This is what I use, See post: 261
http://www.rcuniverse.com/forum/m_11...page_11/tm.htm

Clear Coat:
http://www.u-pol.com/product-cat/13/...t-%2831%29.htm

Hardener:
http://www.u-pol.com/product-cat/48/...t-hardener.htm

Best regards,

Isaac Najary
Old 04-29-2013, 10:15 PM
  #303  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

After 27 flights, I can say that I am pleased with the plane angles and C.G. place.

The angles are just as Pascal Novik recommended, (thanks Pascal):

The T canalizer: – 1° from the fuselage center line.

The stabilizers: 0°,

The wing: + 0.8°

The motor: 1.5° down, 3° right.

The C.G. is at 193 mm from the trailing edge.

Best regards,

Isaac Najary
Old 04-29-2013, 10:27 PM
  #304  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Now it is the time to remove the wings adjusters and to save 11 gram more (13.5-2.5).

This also eliminates some unpleasant flexibility from the wings roots.

Best regards,

Isaac Najary
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Old 04-29-2013, 10:31 PM
  #305  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Now the final weight is = 4,771 gram.

With Rhino Battery 1,203 gram and 21 X 13 APC prop.

Best regards,

Isaac Najary
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Old 04-30-2013, 10:27 AM
  #306  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Dear Isaac,

very well done, congratulation!!

Please allow this question: Are you sure about the CG?

Best regards

Michael
Old 05-02-2013, 06:57 AM
  #307  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY


ORIGINAL: Mike_StampeSV4

Dear Isaac,

very well done, congratulation!!

Please allow this question: Are you sure about the CG?

Best regards

Michael
Hi Michael,

Sorry it is 193 mm.

Best regards,

Isaac Najary
Old 05-10-2013, 08:39 AM
  #308  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

I have now 42 flights with the Arixtra and I can definitely say that it is the best F3A plane I ever had.

My friend Amram Leshed who is one of the best F3A pilot in Israel (and also an international F3A judge) saw the plane flying today and said that this is the best F3A plane he had ever seen!!! (Amram is well known here in Israel as one who can observe any tiny undesirable movement of a plane).

Today I finished calibrating the plane for knife edge loop.

This plane has a very big fin and the fuselage side area is about 10% bigger than the Xigris. It does a knife edge loop with ease, you need only half of the rudder movement in order to do a knife edge loop, compared to the Xigris and almost no need for mixing, amazing!

Here are the mixing rates it needs for knife edge loop:

The rudder stick movement is from – 45% to + 45%.

I use Spline mixer type for knife edge mixing.

Rudder to Aileron:
Position point Rate
-50% 0%
-25% 0%
-10% 0%
0% 0%
+10% 0%
+20% -0.5%
+50% -0.5%

Rudder to Elevator:
Position point Rate
-50% 0%
-30% 0%
-20% 0%
-10% -0.5%
0% 0%
+10% -1.5%
+20% 0%
+30% 0%
+50% 0%


Best regards,

Isaac Najary
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Old 05-10-2013, 10:19 AM
  #309  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Definitly the best F3A Ship I have seen or flown.
This specific model build by Najary is also most beautiful and light. 4700gram with heavy pack.
It's flight stability, pass tracking, head locking, and couplings is something which only the CPLR Axiome gets close too.
I know many people across the world have seen the build process over the thread on RCU forum but believe it or not it is more
beautiful and impressive in real!
Well design...
Ever best possible build...
Great machine...and
great F3A sportsman who is always ready to share with everybody his 40 years F3A expiriance & knowladge!

Thank you Issac & Congratulations...


Old 05-20-2013, 12:12 PM
  #310  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

I had the internet link to the website to order one. The site does not exist anymore, is the kit still available?

Njary,..Beautiful plane Sir.....

Bill
Old 05-20-2013, 12:31 PM
  #311  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Bill, here's another option to try [link=http://www.aerobertics.be/products.php?searchString=arixtra]Arixtra[/link]

Old 05-20-2013, 12:35 PM
  #312  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Thanks Mr.Watson. I had found that, wasn't sure if that one was good. Thanks for confirming that.

BR, .


Bill
Old 05-20-2013, 03:27 PM
  #313  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

The manufacturer's (Aerocompet) website was changed from .fr to .com recently, so it's now www.aerocompet.com
Arixtra kit -> http://www.aerocompet.com/index.php?...duct&id_lang=1
Old 05-20-2013, 04:16 PM
  #314  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Thank you very much! Very nice website.

Bill
Old 06-03-2013, 01:22 PM
  #315  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Isaac, what are you doing with the sand paper in Post #100?
Old 06-05-2013, 09:20 PM
  #316  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY


ORIGINAL: gaRCfield

Isaac, what are you doing with the sand paper in Post #100?
Hi Joe,

The sand paper simulates the thickness of the paint and the velvety sticker in the stabilize root so the bolt that attaches the stabilizer will be in place see post #101.

Best regards,

Isaac Najary
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Old 06-06-2013, 05:30 AM
  #317  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Very nice! Thanks Isaac. I am at this stage with my Integral. I have learned a lot from your threads.
Old 07-25-2013, 05:27 PM
  #318  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY

Hi Isaac,

When you fill the wing root (Post #151):
1) do you lube or do anything special to the plastic wrap?
2) are you using epoxy and microballoons? if so, is it finishing epoxy?

I have to fill the roots of my Integral. It is a composite wing so I was thinking of a wide bead of epoxy/microballoons or a wide bead of Hysol.

Thanks again for all of your work and information. I am learning a lot from you.

Best,
Joe
Old 08-01-2013, 07:07 AM
  #319  
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Default RE: ARIXTRA Build Thread by ISAAC NAJARY


ORIGINAL: gaRCfield

Hi Isaac,

When you fill the wing root (Post #151):
1) do you lube or do anything special to the plastic wrap?
2) are you using epoxy and microballoons? if so, is it finishing epoxy?

I have to fill the roots of my Integral. It is a composite wing so I was thinking of a wide bead of epoxy/microballoons or a wide bead of Hysol.

Thanks again for all of your work and information. I am learning a lot from you.

Best,
Joe
Hi Joe,

Sorry for the late answer.

1. I use some water with the plastic wrap.

2. I use structure epoxy with large quantity of microballoons see picture.

Best regards,

Isaac Najary
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Old 08-23-2013, 01:33 PM
  #320  
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Isaac, how is your motor mount holding up? I am in the process of making a carbon mount. My first piece looks great but I am concerned about how little material I have surrounding the bolt holes. I know I could use a little more but not sure how much. This is carbon from HK (this mount is .060"/1.5mm, but I will use either 2.5mm/.100" or a piece of .090" I have. Your mount in #104-105. The digital picture is my next rendition. Actual part has 2.8mm material to either side of hole. Digital model has 4.65mm. Holes themselves are 4.6mm diameter.
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Old 08-23-2013, 10:52 PM
  #321  
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Originally Posted by gaRCfield
Isaac, how is your motor mount holding up? I am in the process of making a carbon mount. My first piece looks great but I am concerned about how little material I have surrounding the bolt holes. I know I could use a little more but not sure how much. This is carbon from HK (this mount is .060"/1.5mm, but I will use either 2.5mm/.100" or a piece of .090" I have. Your mount in #104-105. The digital picture is my next rendition. Actual part has 2.8mm material to either side of hole. Digital model has 4.65mm. Holes themselves are 4.6mm diameter.

Hi Joe,

My motor mount holding up very good.

Best regards,

Isaac Najary
Old 09-02-2013, 06:08 AM
  #322  
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Cool

The Arixtra weights 4,537 gram!!!

With the new DUALSKY batteries SD-130730F (4,600 mah 25C) - 978 gram!!!

Best regards,

Isaac Najary


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Last edited by najary; 09-02-2013 at 06:13 AM.
Old 09-02-2013, 08:28 AM
  #323  
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Isaac, where did you get those batteries? Have a link?

Thanks.
Old 09-03-2013, 10:17 AM
  #324  
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Hello Isaac

How many flights with these batteries ?
Claude
Old 09-05-2013, 11:29 AM
  #325  
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Hello Claude
Isaac asked me to answer because I have more experience with these batteries
I have two batteries, each one has 12 flights
Presently they are like the batteries from hobby king, the rhino 4900 20C
In thrust, power consumption, heat and will internal resist (average 1.4 per cell)

Chester

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