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HomeAircraftHelicopterGasser Model RC HelicoptersOther › Aggressive and Non-Aggressive Clutch shoe......
01-12-2009 07:52 AM  9 years agoPost 1
lazy-b

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Manila, Philippines

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Aggressive and Non-Aggressive Clutch shoe......

I accidentally discover that there are 2 Clutch system:

http://www.youtube.com/watch?v=fsSN...re=channel_page

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01-12-2009 06:07 PM  9 years agoPost 2
TaleGunner

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Deer Park WA

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Any body out there have a life span comparison on the 2 types?

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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01-13-2009 08:33 AM  9 years agoPost 3
lazy-b

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Manila, Philippines

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talegunner:

Theoretically.....The AGGRESIVE type Clutch shoe will give a longer life span:

1. due to much smaller clearance (Gap between shoe and lining), the shoe need to move a little, less movement less stress on Metal on its pivot point (Flexing point).

2. The Pivot point is experience COMPRESSION STRESS, COMPRESSION is better than TENSION, cause TENSION will make metal thinner while COMPRESSION will make Metal thicker....Just imagine a Plastic Nylon, as you stress the Plastic Nylon, the tension will cause the Plastic Nylon to get Thinner...and thinner until it break.

3. The Torque Created by the engine will Further increase the effective Centrifugal Force, this gives a Better Grip of clutch system, as I show in my video.

Wow....look like its a 3 fold advantage.

Ellion

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01-13-2009 10:00 AM  9 years agoPost 4
pgkevet

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Wales

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1. due to much smaller clearance (Gap between shoe and lining), the shoe need to move a little, less movement less stress on Metal on its pivot point (Flexing point).
I would expect that the gap is the same for either type. The theoretical benefit of aggressive shoe that there is a 'dig in' on the point of the clutch.. so a better grip but countered by more lining wear?
2. The Pivot point is experience COMPRESSION STRESS, COMPRESSION is better than TENSION, cause TENSION will make metal thinner while COMPRESSION will make Metal thicker....Just imagine a Plastic Nylon, as you stress the Plastic Nylon, the tension will cause the Plastic Nylon to get Thinner...and thinner until it break.
Surely on any solid metal pivot point acting as a spring then for any compession side there is also a tension side? In either case so long as design isn;t exceeded it isn;t the compression or tension thats the problem but the cycling of these actions ina heating environment that crystallises metal to failure?
3. The Torque Created by the engine will Further increase the effective Centrifugal Force, this gives a Better Grip of clutch system, as I show in my video.
I didn't watch your video but whether aggressive or non aggressive the clutch wings will be affected by 'centrifugal forces'. The ony argument I can see is if the angle of the aggressive clutch points are correctly faced so that at an optimum rpm and spin-out the angle of 'dig' into the clutch liner is also optimal.

The above comments may all be rubbish ..but posted here to be criticsed for my education.

Ace oughta know?

pgk

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01-13-2009 10:04 PM  9 years agoPost 5
AceBird

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Utica, NY USA

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Ace oughta know?
LOL I think you did a superb job.

You can't overlook any details in the system. The digging in can be a world of difference between a soft lining and a hard lining. If the lining and shoe are hard materials than aggressive and non-aggressive will make little difference because the pivot point is very close to the friction surface. Move that pivot point down towards the center of rotation and then you will have a huge difference (like in the auto-rotation clutches).

Ace
What could be more fun?

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01-13-2009 11:12 PM  9 years agoPost 6
TaleGunner

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Deer Park WA

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Well that answered my question

Lazt b says theoretically YES
pgkevet says no and
ACE says no difference if you use hard lining..

So the tally is maybe, no and only if

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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01-15-2009 04:31 AM  9 years agoPost 7
lazy-b

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Manila, Philippines

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Thanks to all your comments.

Thats also my first impression, thats the Newer AGGRESSIVE-TYPE has the possibility of digging up the Clutch lining.

One Possibility of another improvement to avoid digging up is to make the edge of the Clutch shoe near the Half of the Clutch diameter, this will avoid Digging-up even the clutch shoe is fully open.

The only major improvement of this AGGRESSIVE-TYPE is just a further increase in Centrifugal Force due to the Torque of the engine is pushing the Clutch shoe.

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