lightened rotor's...
Thread Starter
Joined: Aug 2004
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From: South Coast, England
lightened rotor's...
This is an example of work being done by some local engineers in Auckland, New Zealand.
If anyone has any susuggestion's, comments or theory's on the shown rotor for improvements, what have you, drop us a line, always good to hear other people's idea's.
If anyone has any susuggestion's, comments or theory's on the shown rotor for improvements, what have you, drop us a line, always good to hear other people's idea's.
Rotary Enthusiast
Joined: Dec 2001
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From: Delaware
If rotor weights are changed, I think the e-shaft assembly must be dynamically balanced. The e-shaft is fitted with 'bobweights' for the rotors, and the fore/aft counterbalance weights(frt hub and flywheel), and then the assembly is spun balanced at a few hundred rpm.
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How come they never used lightened materials (ie: aluminium) for the rotors? I was just reading my RX-7 history book and was wondering why Mazda made the rotating assembly so heavy (I have two rotors and an e-shaft sitting here and that's a hefty chunk of metal to be spinning around at high RPMs).
I figured it wasn't a durability issue because the rotor housing themselves are aluminium, so would it be because lighter assemblies might decrease torque or something of that nature?
I figured it wasn't a durability issue because the rotor housing themselves are aluminium, so would it be because lighter assemblies might decrease torque or something of that nature?
Originally Posted by uRizen
How come they never used lightened materials (ie: aluminium) for the rotors? I was just reading my RX-7 history book and was wondering why Mazda made the rotating assembly so heavy (I have two rotors and an e-shaft sitting here and that's a hefty chunk of metal to be spinning around at high RPMs).
I figured it wasn't a durability issue because the rotor housing themselves are aluminium, so would it be because lighter assemblies might decrease torque or something of that nature?
I figured it wasn't a durability issue because the rotor housing themselves are aluminium, so would it be because lighter assemblies might decrease torque or something of that nature?
Eats, Sleeps, Dreams Rotary
Joined: May 2003
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From: MIA
Originally Posted by the_glass_man
Because of the increased cost. Mazda used aluminum ceramic coated rotors in their MX-03 concept car. It really would be nice if Mazda used aluminum throughout the entire engine assembly.
Originally Posted by RotaryWeaponSE7EN
I am also interested in who offers these services.
Actually, as I understand it, dramatically lighter rotors will decrease lower end torque. Most likely, Mazda kept some weight to help the torque on an engine that was already light on the bottom end torque.
Joined: Jul 2002
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From: 195 Miles West of Bridgeport, WA
Originally Posted by digitalsolo
Actually, as I understand it, dramatically lighter rotors will decrease lower end torque. Most likely, Mazda kept some weight to help the torque on an engine that was already light on the bottom end torque.
https://www.rx7club.com/showthread.php?t=379771
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From: fl
think about it:
torque= (force X distance). did you see anything about mass in there?
the argument that light weight rotors will reduce your engines tourque is a joke.
now the lower rotational inertia and probable loss of smoothness associated with it could be interpreted as a loss of tourque, but it technically isnt.
i could see a severly lightened rotor being "capped" to a certain level of boost and thus tourque output for the sake of reliabilty. but apples to apples i see no way how a lighter rotor would make an engine loose torque.
if anything, the motor would probobly produce MORE crank torque because of reduced bearing loads etc...
torque= (force X distance). did you see anything about mass in there?
the argument that light weight rotors will reduce your engines tourque is a joke.
now the lower rotational inertia and probable loss of smoothness associated with it could be interpreted as a loss of tourque, but it technically isnt.
i could see a severly lightened rotor being "capped" to a certain level of boost and thus tourque output for the sake of reliabilty. but apples to apples i see no way how a lighter rotor would make an engine loose torque.
if anything, the motor would probobly produce MORE crank torque because of reduced bearing loads etc...
Last edited by andrew lohaus; Jan 19, 2005 at 12:56 AM.
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