"according to the AMA Safety Code"
12-22-2010, 08:10 AM
#1
Senior Member
Thread Starter
Join Date: Oct 2004
Location: San Antonio,
TX
Posts: 6,681
Likes: 0
Received 0 Likes
on
0 Posts
"according to the AMA Safety Code"
MA, Jan2011, p19, top left pic caption:
I'm having difficulty in locating the SC rules/recommendations on 'special' propellers,
anybody got a link to that part of the SC?
The special propellers require special handling and are not recommended for reproduction according to the AMA Safety Code
anybody got a link to that part of the SC?
12-22-2010, 08:26 AM
#2
My Feedback: (58)
Join Date: Dec 2001
Location: here
Posts: 5,413
Likes: 0
Received 0 Likes
on
0 Posts
RE:
ORIGINAL: KidEpoxy
MA, Jan2011, p19, top left pic caption:
I'm having difficulty in locating the SC rules/recommendations on 'special' propellers,
anybody got a link to that part of the SC?
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
anybody got a link to that part of the SC?
12-22-2010, 08:38 AM
#3
Senior Member
Thread Starter
Join Date: Oct 2004
Location: San Antonio,
TX
Posts: 6,681
Likes: 0
Received 0 Likes
on
0 Posts
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
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
12-23-2010, 08:39 AM
#5
Join Date: Jan 2002
Location: Tucson,
AZ
Posts: 127
Likes: 0
Received 0 Likes
on
0 Posts
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.
I've never ever had one come apart, even when used in EDF's.
12-24-2010, 08:15 AM
#6
Senior Member
Thread Starter
Join Date: Oct 2004
Location: San Antonio,
TX
Posts: 6,681
Likes: 0
Received 0 Likes
on
0 Posts
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.
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.
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
If the SC says that,
why is it so hard to find someone that can point to that part of the SC.
12-24-2010, 09:54 AM
#7
My Feedback: (24)
Join Date: Mar 2002
Location: Bismarck, ND
Posts: 751
Likes: 0
Received 0 Likes
on
0 Posts
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.
.... 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.
12-24-2010, 01:42 PM
#8
Join Date: Mar 2006
Location: U.P.,
MI
Posts: 8,048
Likes: 0
Received 0 Likes
on
0 Posts
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.
