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"according to the AMA Safety Code"

Old 12-22-2010, 08:10 AM
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KidEpoxy
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Default "according to the AMA Safety Code"

MA, Jan2011, p19, top left pic caption:
The special propellers require special handling and are not recommended for reproduction according to the AMA Safety Code
I'm having difficulty in locating the SC rules/recommendations on 'special' propellers,
anybody got a link to that part of the SC?
Old 12-22-2010, 08:26 AM
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littlecrankshaf
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Default RE:


ORIGINAL: KidEpoxy

MA, Jan2011, p19, top left pic caption:
The special propellers require special handling and are not recommended for reproduction according to the AMA Safety Code
I'm having difficulty in locating the SC rules/recommendations on 'special' propellers,
anybody got a link to that part of the SC?
Good catch kid...probably something pulled from his ask... seen that many times... although interesting how this type of BS happens, I wouldn't worry about it much...err...not until some idiot tries to push that crap down my throat...then the fight is on
Old 12-22-2010, 08:38 AM
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Default RE: RE:

If it really is something we (ama) doesnt want us to do,
why glorify it being done in our magazine?

Its not just an informative article announcing it was done on that plane, it was part of a BUILD article
... and a scale plane to boot:~ Look at me, I made beautiful scale props that you shouldnt /not a quote
Old 12-23-2010, 04:59 AM
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Lifer
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Default RE:

Don't quote me on this, but from memory the AMA has special instructions on how to set up one-blade props and rules against the use of metal-bladed props. This MAY be what it is referring to in this instance.
Old 12-23-2010, 08:39 AM
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Default RE: RE:

Actually, multi-blade props are an oxymoron. Simple in concept, but tehnically difficult to make accurately with out the proper tools. Basically, sacrificial props, an accurate counterbore with an extremely accurate depth of cut, and a accurate degree wheel are needed. Blades are counterbored to 1/number of blade depth, stepping for each blade, mounted on a shaft, and glued to the proper angle. The shaft needs to be full dia and threaded far enough out that washers and a nut can be used to compress the stack. Glue, of course, needs to be very slow setting.

I've never ever had one come apart, even when used in EDF's.
Old 12-24-2010, 08:15 AM
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KidEpoxy
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Default RE:

Dreamer
Yes, when done correctly those props will perform well.
When manufactured with shoddy craftsmanship or materials they can fail.
However, we can say pretty much anything will fail if made shoddy enough or with materials not up to the task.
.... even a hammock, which is by no means a complex object, will fail if sewn with poor material or the wrong knots on the leads.



... and are not recommended for reproduction according to the AMA Safety Code
Where did MA magazine come up with that?
If the SC says that,
why is it so hard to find someone that can point to that part of the SC.
Old 12-24-2010, 09:54 AM
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Woody218
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Default RE: RE:


KidEpoxy

.... even a hammock, which is by no means a complex object, will fail if sewn with poor material or the wrong knots on the leads.
Ask me how I know this to be true...
Old 12-24-2010, 01:42 PM
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Default RE:

I noticed that on page 18 the props have 2 white stripes on them at the tips for safety reasons I presume. Now on page 19 they do not.....? Is this the same plane? I also see a missing Canada flag on page 18. I wonder how many of these props are in existance.
Old 12-24-2010, 02:36 PM
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Imagine how long it took to find a place selling 5slot spinners [8D]

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