Dirtyginger's Magic Pie wheel rebuild

[Webby]

Thanks Alan - that explains it. Re. washers - In Camberley near me on the London road there is a great engineers paradise - AHC - and thats going to be the place to go me thinks.

_Gonzo_ - re: loctite .. I hear you and actually if you google around, alot of folks say the same thing as you  ... BUT ... being the rebel I am on the very rare occasion (sorry its not my fault but its to do with my Myers Briggs profile) I had one rouge spoke in the early days - I know because I marked the bugger with tape and it was the same one that kept coming loose - since I dabbed loctite meduim on it, it has been sound ..and very stable and I am approaching nearly 1000 miles now on that pie!

The freindly chaps at AHC said that Loctite medium is designed to be 'undone' with hand tools and that's exactly what it does. Its not a 'solid' glue but rather a sort of sticky thing. Having said that, have you experienced problems first hand?

[MAGICPIE3FOCUSPOWER]

Thanks for your great info!

But how did you measure the correct spokes lenght?

[DirtyGinge]

There are several spoke calculators around that will help you. However I have always found graham@tillercyles great help in both calculating the lengths accurately, and then supplying top quality custom lengths ...

[MAGICPIE3FOCUSPOWER]

Okay thanks for your reply!

[MAGICPIE3FOCUSPOWER]

What is the ERD of the 26" GM rim?

[Morgen 3Eman]

OK, folks, to me an "ERD" is the acronym for "Entity Relationship Diagram", which is a description of a database.   What are you referring to with "ERD"?

Make me smarter, please.  I need all the help I can get.

TTFN,
Dennis

[truly_bent]

Entity Relationship Diagram = Nak!
Evil Rubber Ducky = Ack!

[MAGICPIE3FOCUSPOWER]

Hahaha almost good!

Effective rim diameter

[Bikemad]

OK, folks, to me an "ERD" is the acronym for "Entity Relationship Diagram", which is a description of a database.   What are you referring to with "ERD"?

Make me smarter, please.  I need all the help I can get.

                                                           

Since you asked so nicely;

ERD   Entity Relationship Diagram
ERD   Ethical and Religious Directives (Catholic Health Care Services)
ERD   Emergency Repair Disk
ERD   Episcopal Relief and Development
ERD   Economic Relations Division (Bangladesh)
ERD   Event-Related Desynchronization
ERD   Extended Reach Drilling (oil industry)
ERD   Emergency Response Division
ERD   Elastic Recoil Detection
ERD   Environmental Restoration Division
ERD   Energy Recovery Device
ERD   Explosives Regulatory Division
ERD   Eligible Rollover Distribution
ERD   Early Return of Dependents
ERD   effective rim diameter (cycles)
ERD   Ecosystems Research Division (US EPA)
ERD   Employee Relations Division
ERD   Esophageal Reflux Disease
ERD   Earthquake Resistant Design
ERD   Early Random Drop
ERD   Expected Reinsurer Deficit (CAS Risk Transfer Metric)
eRD   E-Referencedesk
ERD   Estimated Release Date
ERD   Early Release Date (prision)
ERD   Emergency Reserve Decoration (UK)
ERD   Environmental Radiation Data
ERD   Early Renal Damage
ERD   Electronic Restraint Device
ERD   Equal-Cost-Route Descriptor (Cisco)
ERD   Equivalent Residual Dose
ERD   Enterprise Relational Database
ERD   Equipment Readiness Date
ERD   Experimental Research Design
ERD   Employment Relations Divisions (Montana)
ERD   External Reuse Density
ERD   External Requirements Document
ERD   Estimating Requirements Document (mini Cost Analysis Requirements Document)
ERD   Engineering Review Diagram
Erd   Total Residential Energy Demand (Carolina Environmental Program)
ERD   Expected Recovery Date (medical terminology)
ERD   Envelope Recipient Domain (email)
ERD   Exchange Rate Difference (finance)
ERD   Électricité de France Réseaux de Distribution (French)
ERD   External Relations Department (various organizations)

It could also be used to describe the typical British weather that I've had to put up with this "Summer"  - Enormous Rain Drops!
Visual proof attached below (taken on 5th August!!).

Anyway, this should help to clarify the intended meaning:

Effective Rim Diameter.
This is the rim diameter measured at the nipple seats in the spoke holes, plus the thickness of the two nipple heads.
The E.R.D. is needed for calculating the correct spoke length.

I tried to determine the ERD on a built up wheel and I reckon it is somewhere around 518mm on the 26" GM rim that I measured.
(The inside diameter is approximately 508mm and the 13mm long nipples only have ~8mm protruding from the inside of the rim.)

The factory fitted spokes are 110mm long when measured from the inside of the elbow:


Alan
 

[Morgen 3Eman]

Hi Alan,

Ok, I give up!  I now want to remain dumb as a post!  Evil Rubber Ducky it is.

I can't imagine how much work went into compiling your list.  Elastic Recoil Detection! That sounds like porno!   Thanks for the laugh. 

TTFN,
Dennis   

[MAGICPIE3FOCUSPOWER]

Hahah thanks!

Does anyone knows where I can download MP III motor drawing pdf?

Or the anyone knowns the dimenions of the MP3 motor?

[truly_bent]

http://www.goldenmotor.com/hubmotors/Magic%20Pie%20Sizes%20Model.pdf

[MAGICPIE3FOCUSPOWER]

Thanks mate!

So the diameter is 203,5mm?

[truly_bent]

I gather you don't know how to read a mechanical dimensions type drawing.

The width of the axle is 203.5mm. It looks to me like the diameter is 299mm (11.77"). Perhaps Alan can confirm that. He doesn't have anything to do except mope around in the rain anyway.

Jeff

[MAGICPIE3FOCUSPOWER]

Aaha yes I see it now you are correct!
Because it says for 135mm rear fork

Thanks!