FANTASISTA EVO Build Thread by ISAAC NAJARY
07-26-2015, 09:39 PM
#79
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Here I made the correction of what I did in post 69.
Because this is the first time that I am going to use the Futaba 9174 wing munt servo,
I did not took in considerations that this servo has a special flunch around it.
The mistake was that I should not cut the wing skin for the servo munt.
I should glue this servo munt exactly as I glue the other servo in the wing.
Sorry,
Isaac Najary
Because this is the first time that I am going to use the Futaba 9174 wing munt servo,
I did not took in considerations that this servo has a special flunch around it.
The mistake was that I should not cut the wing skin for the servo munt.
I should glue this servo munt exactly as I glue the other servo in the wing.
Sorry,
Isaac Najary
07-27-2015, 08:33 AM
#80
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Today I received the RS contra drive with 91 mm spinner and Hacker C54 motor.
http://www.ralphschweizer.com/startseite.htm
All parts are top quality.
Ralph Schweizer service and the technical support is superb,
Thank you Ralph.
http://www.ralphschweizer.com/startseite.htm
All parts are top quality.
Ralph Schweizer service and the technical support is superb,
Thank you Ralph.
07-31-2015, 05:16 AM
#86
Hi Isaac
Great thread. How is the build going. The RS CRS drive certainly looks impressive. Why did you choose this drive as opposed to the Brenner drive. There doesn't seem to be a lot of information out there on the RS drive. Do you know what reduction ratio it uses and maximum current draw.
David
Great thread. How is the build going. The RS CRS drive certainly looks impressive. Why did you choose this drive as opposed to the Brenner drive. There doesn't seem to be a lot of information out there on the RS drive. Do you know what reduction ratio it uses and maximum current draw.
David
07-31-2015, 09:02 AM
#89
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Beautiful work Isaac!
Can you give us some details about the wing construction? I see some good opportunities here to save considerable weight for my future builds. I would be interested to know what is the thickness and weight of the wing balsa sheeting, material and thickness for the root rib, weights before covering?
Thanks.
Can you give us some details about the wing construction? I see some good opportunities here to save considerable weight for my future builds. I would be interested to know what is the thickness and weight of the wing balsa sheeting, material and thickness for the root rib, weights before covering?
Thanks.
Thank you for the compliments.
The thickness is 2 mm and weight of the wing balsa sheeting is 17-18 gram for 100X910 mm sheet.
The thickness is 2 mm and weight of the wing root ribs is 19-20 gram for 100X910 mm sheet.
The weights before covering are 265, 266 gram.
Best regards,
Isaac Najary
07-31-2015, 09:21 AM
#90
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Hi Isaac
Great thread. How is the build going. The RS CRS drive certainly looks impressive. Why did you choose this drive as opposed to the Brenner drive. There doesn't seem to be a lot of information out there on the RS drive. Do you know what reduction ratio it uses and maximum current draw.
David
Great thread. How is the build going. The RS CRS drive certainly looks impressive. Why did you choose this drive as opposed to the Brenner drive. There doesn't seem to be a lot of information out there on the RS drive. Do you know what reduction ratio it uses and maximum current draw.
David
I choose the RS CRS drive because I needed 91 mm spinner and the Brenner drive is only 82 mm spinner.
The RS CRS drive with the Hacker C54 is the littlest contra drive available, as far as I know.
If it is good for Mr. Wolfgang Matt, it is certainly good for me.
https://www.facebook.com/photo.php?f...type=1&theater
As for you other questions, you can ask Mr. Ralph Schweizer
[email protected]
Best Regards,
Isaac Najary
07-31-2015, 09:50 AM
#91
Hi Alex,
Thank you for the compliments.
The thickness is 2 mm and weight of the wing balsa sheeting is 17-18 gram for 100X910 mm sheet.
The thickness is 2 mm and weight of the wing root ribs is 19-20 gram for 100X910 mm sheet.
The weights before covering are 265, 266 gram.
Best regards,
Isaac Najary
Thank you for the compliments.
The thickness is 2 mm and weight of the wing balsa sheeting is 17-18 gram for 100X910 mm sheet.
The thickness is 2 mm and weight of the wing root ribs is 19-20 gram for 100X910 mm sheet.
The weights before covering are 265, 266 gram.
Best regards,
Isaac Najary
In post #76, did you also add a doubler to the root rib? Most of the strength at the root rib probably comes from this doubler, is it made of liteply? Did you measure its weight? I think the root rib in my wing weights too much and i'm looking for a solution to reduce its weight in the future.
08-01-2015, 05:28 AM
#92
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Thanks for your answer Isaac, very nice work. Your wings are very light, i must find some better balsa sheets in the future because the weight saving can be significant. The best sheets i could find here locally were around 23g.
In post #76, did you also add a doubler to the root rib? Most of the strength at the root rib probably comes from this doubler, is it made of liteply? Did you measure its weight? I think the root rib in my wing weights too much and i'm looking for a solution to reduce its weight in the future.
In post #76, did you also add a doubler to the root rib? Most of the strength at the root rib probably comes from this doubler, is it made of liteply? Did you measure its weight? I think the root rib in my wing weights too much and i'm looking for a solution to reduce its weight in the future.
Do you ask about this pic?
08-02-2015, 08:41 AM
#94
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Hi Alex,
This is not a doubler, this is a temporary 2mm balsa spacer between the root rib and the fuselage (it is glued to the root rib with a very few super glue drops).
In this plane, the root rib is curve because the fuselage is curve at that point.
I use this balsa spacer to attach the root rib to the fuselage with some pins when it glued to the wing (see pic).
The spacer also allows the carbon wing socket to pass into the root rib (this is a change I did, originally it does not pass into the root rib) (see pic).
After the root rib is glue to the wing, the temporary 2mm balsa spacer is remove (see pic).
In my opinion the root rib has very little to do with the wing strength, it is made of 1.5 mm plywood, it is very light (I did not measured it), and it mean function is to have a good place for the anti-rotation pins and for the screw that attach the wing to the fuselage.
Best regards,
Isaac Najary
This is not a doubler, this is a temporary 2mm balsa spacer between the root rib and the fuselage (it is glued to the root rib with a very few super glue drops).
In this plane, the root rib is curve because the fuselage is curve at that point.
I use this balsa spacer to attach the root rib to the fuselage with some pins when it glued to the wing (see pic).
The spacer also allows the carbon wing socket to pass into the root rib (this is a change I did, originally it does not pass into the root rib) (see pic).
After the root rib is glue to the wing, the temporary 2mm balsa spacer is remove (see pic).
In my opinion the root rib has very little to do with the wing strength, it is made of 1.5 mm plywood, it is very light (I did not measured it), and it mean function is to have a good place for the anti-rotation pins and for the screw that attach the wing to the fuselage.
Best regards,
Isaac Najary
Last edited by najary; 08-02-2015 at 08:54 AM.
08-02-2015, 09:39 AM
#95
Thanks for explaining it in detail Isaac, i understand now.
I used 3mm liteply for the root rib just to be safe, and judging from the pictures it looks like Dave Snow used the same material for his wing designs. My root rib is very long (580mm) so it's also quite heavy. It weighs around 30% of the whole internal structure of the wing, so i'm looking for something lighter. The Fantasista uses some interesting solutions so this may be very useful in the future.
I used 3mm liteply for the root rib just to be safe, and judging from the pictures it looks like Dave Snow used the same material for his wing designs. My root rib is very long (580mm) so it's also quite heavy. It weighs around 30% of the whole internal structure of the wing, so i'm looking for something lighter. The Fantasista uses some interesting solutions so this may be very useful in the future.