gyro
GSN Contributor
Awesome!
Aztech Aeromodels Spot on Version2 Servo Arms
- Thread starter bbrown2828
- Start date
Awesome!
djmoose
70cc twin V2
Was just curious. When the V1s went on sale I did some quick research to see if I could save money and everything I saw said 6061 was stronger.
(I ordered a bunch of V1s over the winter from Aztek, btw)
This seems to be an example of a company (spot-on) using the term "better" and many folks just assuming the new material is stronger (and publicly stating such in forum product reviews...when in fact it's not.)
It seems like the V2s use a "better" material for making the arms....which in turn might make them easier to apply to servos...but when in fact they're not as strong...which to me is a very important quality of a servo arm going into a GS plane. (to me...more important than how easily they install onto my servos...particularly when the V1s didn't seem to have a insertion/application problem in the first place...at least not enough for me to think there was a problem.)
(I ordered a bunch of V1s over the winter from Aztek, btw)
This seems to be an example of a company (spot-on) using the term "better" and many folks just assuming the new material is stronger (and publicly stating such in forum product reviews...when in fact it's not.)
It seems like the V2s use a "better" material for making the arms....which in turn might make them easier to apply to servos...but when in fact they're not as strong...which to me is a very important quality of a servo arm going into a GS plane. (to me...more important than how easily they install onto my servos...particularly when the V1s didn't seem to have a insertion/application problem in the first place...at least not enough for me to think there was a problem.)
gyro
GSN Contributor
The new arms are stronger in that they don't slip on the gears, because they tighten down better and are more secure. Not that they apply easier. I'm guessing the difference between the 6061 and 6063 is negligible in this application, but would love for [MENTION=443]ghoffman[/MENTION] to confirm either way?
Personally, I don't think there is anything misleading about any of the marketing done on these servo arms by the vendor or the forum.
zmonster97
Member
The new V2 arms seem to fit the servo spline much better and tighter, which in turn makes them stronger in that they are not as easy to strip. They also have less play as many people have noted.
I have been using mine for almost a year now and have not had any problems yet.
I have been using mine for almost a year now and have not had any problems yet.
ghoffman
70cc twin V2
The yield strength of 6061 is 40,000 PSI, 6063 is 31,000 PSI, or almost 25% less. And if you compare the ultimate bearing strengths (which would be like the screw ripping out the side of the arm) the 6061 is about 30% greater. However, with 6063, one could extrude it to a near net shape and perhaps have superior grain flow.
6063:
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA6063T6
6061:
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA6061t6
6063:
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA6063T6
6061:
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA6061t6
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PropBuster
50cc
ghoffman, that is interesting - that's higher than what I have seen for 6063, I've always thought it was half.
Look here, I wonder which of our refs is really right:
http://www.engineersedge.com/materials/aluminum-mechanical-properties.htm
I usually use that site for quick checks, it's showing yield of 6063 is much lower at 21,000 psi vs. 40,000 psi for 6061. Regardless which is right, 6063 is gummy as heck, it's typically used in shower door frames, window frames, etc. IIRC.
I totally agree 7075 would be the way to go, but it also costs (from our suppliers) almost 50% more. I would have thought 6061 would be OK for this part, that's what I would make it out of.
Plus extrusions makes sense, until you have to write the check! The min run of material through that small of a die is about a mile of extrusion.
Unless the airplane market is much larger than I think, it makes no sense to run an extrusion (to me). You'd have a couple pallets of bars sitting in the warehouse for a long time! If the model airplane market is actually that big, I'm ready to make parts starting tomorrow.
Maybe one other thought and vote to use softer material - were the old arms cracking at all? 6063 is going to be more malleable and probably resist cracking better but I'd prefer 6061. I'd like to hear why they went with the gummy material, though.
Look here, I wonder which of our refs is really right:
http://www.engineersedge.com/materials/aluminum-mechanical-properties.htm
I usually use that site for quick checks, it's showing yield of 6063 is much lower at 21,000 psi vs. 40,000 psi for 6061. Regardless which is right, 6063 is gummy as heck, it's typically used in shower door frames, window frames, etc. IIRC.
I totally agree 7075 would be the way to go, but it also costs (from our suppliers) almost 50% more. I would have thought 6061 would be OK for this part, that's what I would make it out of.
Plus extrusions makes sense, until you have to write the check! The min run of material through that small of a die is about a mile of extrusion.
Unless the airplane market is much larger than I think, it makes no sense to run an extrusion (to me). You'd have a couple pallets of bars sitting in the warehouse for a long time! If the model airplane market is actually that big, I'm ready to make parts starting tomorrow. Maybe one other thought and vote to use softer material - were the old arms cracking at all? 6063 is going to be more malleable and probably resist cracking better but I'd prefer 6061. I'd like to hear why they went with the gummy material, though.
I will check but this material is not "gummy". The old material was softer as they were starting to wear the splines after a season or two. To me it feels that this material is harder. I can crank down on the locking screws and not worry of them thread stripping.
We flew two 120cc birds all last season watching for wear. If you have seen the videos of the Slick and Raven, you will know we spanked those birds hard. And after going over the airplanes for this season, we have found no slop or plays in the arms. We will continue watching and learning. So far, I have not heard any bad feedback from the V2 arms from customers.
Joe Smith and AJ are also flying these arms.
And I will always welcome constructive criticisms.
We flew two 120cc birds all last season watching for wear. If you have seen the videos of the Slick and Raven, you will know we spanked those birds hard. And after going over the airplanes for this season, we have found no slop or plays in the arms. We will continue watching and learning. So far, I have not heard any bad feedback from the V2 arms from customers.
Joe Smith and AJ are also flying these arms.
And I will always welcome constructive criticisms.
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