RE: ARIXTRA Build Thread by ISAAC NAJARY
 

This was a awesome build thanks Issac for sharing the details of model :D

RE: ARIXTRA Build Thread by ISAAC NAJARY
 

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

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

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

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

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

RE: ARIXTRA Build Thread by ISAAC NAJARY
 

Hi Michael,

Sorry it is 193 mm.

Best regards,

Isaac Najary

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

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...

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

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]

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

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

RE: ARIXTRA Build Thread by ISAAC NAJARY
 

Thank you very much! Very nice website.

Bill

RE: ARIXTRA Build Thread by ISAAC NAJARY
 

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

RE: ARIXTRA Build Thread by ISAAC NAJARY
 

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

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.

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

RE: ARIXTRA Build Thread by ISAAC NAJARY
 

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

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. http://www.rcuniverse.com/forum/atta...mentid=1912063 http://www.rcuniverse.com/forum/atta...mentid=1912061http://www.rcuniverse.com/forum/atta...mentid=1912062

Hi Joe,

My motor mount holding up very good.

Best regards,

Isaac Najary

The Arixtra weights 4,537 gram!!!

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

Best regards,

Isaac Najary


http://www.rcuniverse.com/forum/atta...mentid=1915818http://www.rcuniverse.com/forum/atta...mentid=1915819http://www.rcuniverse.com/forum/atta...mentid=1915820

Isaac, where did you get those batteries? Have a link?

Thanks.

Hello Isaac

How many flights with these batteries ?
Claude

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