prop balancing- heavy edge?
09-01-2002, 11:58 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2002
Location: Hoffman Estates, IL
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
prop balancing- heavy edge?
In the July 2002 issue of Model Airplane News there's a prop
balancing article by David Gierke. Here is a quote:
"...place the prop on the balancer exactly in the vertical position,
with the heavy blade at the bottom. If it rotates to a new equilibrium point, it has a heavy edge."
Mr. Gierke goes on to explain how to shave off material to balance the prop but I found no further explanation that made
clear to me just what exactly is meant by a heavy edge.
Could someone please expound?
Thanks a bunch,
Pete
balancing article by David Gierke. Here is a quote:
"...place the prop on the balancer exactly in the vertical position,
with the heavy blade at the bottom. If it rotates to a new equilibrium point, it has a heavy edge."
Mr. Gierke goes on to explain how to shave off material to balance the prop but I found no further explanation that made
clear to me just what exactly is meant by a heavy edge.
Could someone please expound?
Thanks a bunch,
Pete
09-02-2002, 03:04 AM
#2
My Feedback: (506)
Join Date: Dec 2001
Location: St. Thomas, VIRGIN ISLANDS (USA)
Posts: 2,429
Likes: 0
Received 0 Likes
on
0 Posts
prop balancing- heavy edge?
Short version.
All props have *4* edges; two leading, two trailing.
Place the prop in question on your balancer. Hold the prop horizontal with edges 1 & 2 at the bottom, then let it fall. Note which edge falls and how far it drops.
Next rotate the prop 180 degrees so that edges 3 & 4 are at the bottom, then let it fall. Note which edge falls first and how far it drops.
Whichever edge falls the farthest is the heaviest; start sanding here.
All props have *4* edges; two leading, two trailing.
Place the prop in question on your balancer. Hold the prop horizontal with edges 1 & 2 at the bottom, then let it fall. Note which edge falls and how far it drops.
Next rotate the prop 180 degrees so that edges 3 & 4 are at the bottom, then let it fall. Note which edge falls first and how far it drops.
Whichever edge falls the farthest is the heaviest; start sanding here.
09-02-2002, 03:11 AM
#3
My Feedback: (506)
Join Date: Dec 2001
Location: St. Thomas, VIRGIN ISLANDS (USA)
Posts: 2,429
Likes: 0
Received 0 Likes
on
0 Posts
prop balancing- heavy edge?
BTW in the description above when you hold the prop horizontal then let it fall you are measuring the *bottom* edge, not the top one.
09-02-2002, 03:12 AM
#4
My Feedback: (506)
Join Date: Dec 2001
Location: St. Thomas, VIRGIN ISLANDS (USA)
Posts: 2,429
Likes: 0
Received 0 Likes
on
0 Posts
prop balancing- heavy edge?
Short version.
All props have *4* edges; two leading, two trailing.
Place the prop in question on your balancer. Hold the prop horizontal, then let it fall. Note which edge falls and how far it drops.
Next rotate the prop 180 degrees so that
All props have *4* edges; two leading, two trailing.
Place the prop in question on your balancer. Hold the prop horizontal, then let it fall. Note which edge falls and how far it drops.
Next rotate the prop 180 degrees so that
