need advice on balancing 32 x 10 prop
05-08-2002, 06:41 PM
#1
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need advice on balancing 32 x 10 prop
been running my new motor today and there seems to be more vibration than i expected,
using da 150 with meyjlick 32 x 10 prop which i was led to believe came accurately balanced
what are you guys using to balance large props?
using da 150 with meyjlick 32 x 10 prop which i was led to believe came accurately balanced
what are you guys using to balance large props?
05-10-2002, 01:51 PM
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Balancing large props
I also use a DuBro balancer to balance large props.
I recently bought two Bolly 24x10 props that were advertised as balanced. What I found when I checked them with the DuBro balancer was that were blade balanced but not hub balanced. You probably know that to blade balance the prop is checked in the horizontal position. After the blades are balanced the prop is checked in the vertical position to see if the hub is balanced.
If the hub is very far out of balance I usually CA a small piece of lead onto the side of the hub and file this down until balance is achieved. This eliminates weakening the hub due to fileng or sanding on it.
I also checked a 4-1/4" Tru-Turn spinner and found it was slightly out of balance. I balanced it by removing metal from the inside of the back plate on the heavy side until it was balanced.
I haven't checked whether it's feasible yet but I also plan to check the balance on the 2" prop extension hub on my Zenoah GT-80. I would like to hear if anyone has done this and what the result was.
I recently bought two Bolly 24x10 props that were advertised as balanced. What I found when I checked them with the DuBro balancer was that were blade balanced but not hub balanced. You probably know that to blade balance the prop is checked in the horizontal position. After the blades are balanced the prop is checked in the vertical position to see if the hub is balanced.
If the hub is very far out of balance I usually CA a small piece of lead onto the side of the hub and file this down until balance is achieved. This eliminates weakening the hub due to fileng or sanding on it.
I also checked a 4-1/4" Tru-Turn spinner and found it was slightly out of balance. I balanced it by removing metal from the inside of the back plate on the heavy side until it was balanced.
I haven't checked whether it's feasible yet but I also plan to check the balance on the 2" prop extension hub on my Zenoah GT-80. I would like to hear if anyone has done this and what the result was.
05-10-2002, 06:16 PM
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This may be an off the wall question
Even though this is an opposed twin, once the spinner and prop are balanced, does the position of the prop on the shaft play any part in keeping that delicate balance?
