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02-13-2006 01:31 AM  12 years agoPost 1
perfesser zero

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Dublin, VA., USA

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OK, I've ordered the 6mm head axle thrust BB upgrade for my Hawk Sport. When and if I dork the heli and bend this 6mm spindle, what part number spindle do I need to order to replace this with? As soon as the weather breaks around here I want to go and unwind my Toki. Plus I want to get my heli hauler out of the backyard before it sinks into the water logged ground.

Later...

Tiger 50 - OS 50SX-H
Hawk Sport - OS 37SZ-H
Raptor 30 - OS 37SZ-H
JR 10X/R950S

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02-13-2006 02:17 AM  12 years agoPost 2
SteveH

rrProfessor

Texas

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The part number for the 6mm Feathering Shaft is HW3180A. It's the stock shaft in the Falcon SE and the Raven.

The government cannot give you anything without first taking it from someone else.

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02-13-2006 02:56 AM  12 years agoPost 3
perfesser zero

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Dublin, VA., USA

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SteveH...
I knew I should have just PM'd you in the first place. Thanks anyway Steve!

Later...

Tiger 50 - OS 50SX-H
Hawk Sport - OS 37SZ-H
Raptor 30 - OS 37SZ-H
JR 10X/R950S

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02-13-2006 03:17 AM  12 years agoPost 4
Lefty and Leroy

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Temple, Texas

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So HW3180A is inside CN2221. I've been thinking about the same thing. Steve, would I need new blade holders to accommodate the thrust bearing?

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02-13-2006 03:36 AM  12 years agoPost 5
SteveH

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Texas

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Jim,

No, but the upgrade comes with new radial bearings as well as the thrust bearings because the Feathering shaft is 6mm whereas the stock Hawk feathering shaft is 5mm. The blade grips are the same. The Thrust Bearing Upgrade consists of the thrust bearings, new radial bearings, some bearing spacers, and the 6mm feathering shaft.

The government cannot give you anything without first taking it from someone else.

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02-19-2006 05:02 AM  12 years agoPost 6
Lefty and Leroy

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Temple, Texas

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Thanks Steve, I just ordered the CN2221 upgrade too.

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02-19-2006 05:15 AM  12 years agoPost 7
Mr.Bowflex

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Toronto Canada

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What would you say is the highest headspeed one should run with the stock spindle set-up and 550 fiberglass blades (funkeys).???

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02-19-2006 02:15 PM  12 years agoPost 8
SteveH

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Texas

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Mr.Bowflex,

The likelyhood is not that it is going to self distruct or anything like that, but you can overload the radial bearings with thrust loads, and make them resistant to movement, or notchy. The maximum RPM that will not do this will depend on things such as blade weight and type of flying because the load applied by cyclic commands adds to the equasion also. Anything I would tell you would just be an estimate because I have no sientific data that says what speed to not exceed, but personally, I would try not to go above 1750. I know there will be flyers that will join in and say "I've been turning my stock Hawk xxxx Rpm for years and nothing has failed", and that's fine...have no arguement with them, but just it's what I would do.

The government cannot give you anything without first taking it from someone else.

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02-25-2006 03:54 AM  12 years agoPost 9
Lefty and Leroy

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Temple, Texas

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Perfesser zero, have you installed your 6mm head axle thrust BB upgrade (CN2221) yet? I got mine today. As I'm putting it together I'm finding it difficult to assemble per the instructions. The 6x12mm bearings fits perfectly into the blade grips but the M8x13mm flat washer will not.

Yep, it's true a 13mm washer will not fit into a 12mm hole

Anyone have any ideas?

Thanks,
-Jim

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02-25-2006 04:50 AM  12 years agoPost 10
Lefty and Leroy

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Temple, Texas

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Interesting... the new bearings are 6x13mm, correct size but incorrectly called out in the instruction sheet as 6x12mm.

The M8x13 Flat washer on the instructions is most likely correct but a M10x14mm is actually in the bag.

Still... a 14mm washer will not fit into a 13mm hole.

Now, anyone have any ideas?

Thanks,
-Jim

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02-25-2006 05:44 AM  12 years agoPost 11
Lefty and Leroy

rrApprentice

Temple, Texas

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OK, I found it. The M8x13 Flat washer was hiding under the in-board bearing. I was reviewing the head assembly instructions on the top of page 12 when I noticed where it was originally located. It's called out as 5x10 Flat Washer, which is not correct. Anyway it fits. I removed it and reassembled the head with M8x13 in its new location.

All is well

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02-25-2006 06:26 AM  12 years agoPost 12
naz

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Medford, OR

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I too got the CN2221 thrust bearing upgrade and am having a problem with the M8 x 13 Flat Washer. IT'S 14MM!! It does not fit into the blade grip and of course the result is too much play. This is the 2nd thrust bearing "upgrade" kit I've had problems with parts that don't fit. Is this common??

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02-25-2006 04:02 PM  12 years agoPost 13
Lefty and Leroy

rrApprentice

Temple, Texas

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naz, You don't use the 14mm washer. It's there to make the upgrade assy more interesting.

The M8x13 Flat washer that you need is hiding under the inside bearing in your blade holder. It's used as a shim because the original 5x13 bearing is thinner than the new 6x13 so you'll have to take it out and use it on the outside, per the instruction sheet.

-Jim

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02-25-2006 05:48 PM  12 years agoPost 14
naz

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Medford, OR

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Thanks for your help. I did take the existing washer that was behind the brass bearings in which the stock feathering shaft is placed though, works great. So what's up with those 14mm washers anyway?

Again, thanks everyone
naz

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02-25-2006 05:53 PM  12 years agoPost 15
SteveH

rrProfessor

Texas

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The M8X13 flat washer must go between the outside radial bearing and the thrust bearing to insure the thrust load is applied to the outside race of the radial bearing and resulting to the blade grip. Also, make shure the race of the thrust bearing that has the smaller I.D. hole goes on the outside, toward the blade. If the thrust bearing races are reversed, there will be resistance to turning of the grip on the shaft.

The government cannot give you anything without first taking it from someone else.

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02-25-2006 06:01 PM  12 years agoPost 16
naz

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Medford, OR

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Steve, got it! Used a micrometer to measure i.d. and ensured outer (towards blade) was smaller on both sides compared to inner race. also, washer was inserted between bearing and larger i.d. race.
Sound correct? Thanks Steve
naz

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02-25-2006 06:36 PM  12 years agoPost 17
Lefty and Leroy

rrApprentice

Temple, Texas

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... make shure the race of the thrust bearing that has the smaller I.D. hole goes on the outside, toward the blade.
Good, mine is installed correctly. Ready for the next flight.
Steve, I moved the fly-bar weights in about 3". I'm thinking this will speed up the roll rate a little but not too much... until I get use to that.

Thanks,
-Jim

Oh, just one more thing, what are those 14mm washers for?

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02-25-2006 06:50 PM  12 years agoPost 18
SteveH

rrProfessor

Texas

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Glad you guys have it installed properly.

Jim, yes moving the weights in will speed up the cyclic response. Just make shure you move them the same amount and the set screws a tight. I would suggest moving them half way in and try that, and later, just take them off.

The government cannot give you anything without first taking it from someone else.

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