Hi Glort,
Having caught multiple missiles (sometimes inadvertently) launched at me in my past youth, I tend to shy away from potential ballistic contact! My reasoning is simple and suits me! We own and run a paintball range, now here is how I base my simplistic calculations on the discomfort index - A paintball weighs in around 3g and travels at about 300ft/sec max.... Up close, a hit on bare skin will make you jump and curse... Take a ball-bearing of around, say 30g and shunt it downrange at 40m/s... round figures or 110ft/sec or so.... comes out to around 3x the energy with about 1/4 the sectional impact area.... that's gonna do a bit more than surprise you! ... I have been hit by ricochets before, both mechanical and ballistic, not fun and by and large in an uncontrolled environment they are unpredictable to say the least.... But, enough said! With reasonable cautions taken, the chances of damage to life and property decrease dramatically...
Dont be scared of pulling the Gibs, just bear in mind that they might be quite tight. Nothing ventured, nothing gained. The flange was notched as you described it and I did rotate it 180 once I slipped it over the key. Dont weld it, if anything, put a small brass shim of sorts on the opposite side between the crankshaft and flange inner to stop it hurting the crank... Once you get the knack on the first pull, you will probs wonder why you were shitting yourself before you started, its not so bad, actually.... Fair to say though, it "might" be tighter than you can handle, but it more likely will not...
The power pulses on the centra units might, no, probably will, mess things around, looking at the "damping" oil used, I would actually suggest a thin grease might be a better option.... Why not mention this to them? To test this "theory", I put some new, good old fashioned, linseed based, window putty in a fillet around the inside of TM1's flywheel to see how it "flowed" under rev... quite interesting, it actually does start to flow quite a bit... The mean diameter is around 550mm and at 750RPM... A thin grease would probably flow like syrup on that size 'fuge...
At my guess, the centra units need a bit of shaft "jump" to allow the unit to balance - a la' suspension and cushioned tyre on a road... A rigidly mounted shaft might not have enough deflection to allow the balls to relocate.... This would possibly present problems for industrial type applications...
Just thinking out loud here.... A roid single has around a kg of unbalanced reciprocating mass if I remember, I can get more accurate numbers if you want, I have them written down somewhere... This thump and bounce, never mind the power stroke, is probably going to prove quite interesting to even out with the centra units.... My mind has just blanked out trying to picture the force vectors involved.... Lol... Still, if it costs little but time to install and test, it would be a worthwhile experiment I reckon, but my money is still on the fixed weight balance each wheel system... Where the centra unit would be better, if it works out, is with the lads that are running their roids at various rpm's - ie those that have a low/med/high rpm/power setting on their units for charging and inverter running under various loads....
Agreed, safety nuts can go a bit overboard... This sensationalist attention grabbing alarmist behavior is part of the "new world" we live in... Apply reasonable caution, along with good common sense, and most situations are seldom life threatening. As Quinn said, "Could have been worse..." .... More injury could easily be caused by a simple unattached flywheel slide off while lifting... an easy oversight with serious consequences.. Common sense says stay away from big heavy things that could possibly fall on you... The number of times I do heavy lifting around here and still have to caution interested onlookers to get the F away from the big heavy bits is alarming... Common sense just aint so common anymore... The lemming genetics must be part of a dormant gene that is starting to re-awaken with the use of cellphones...
Enough ranting from my side... I gotta go weld up some roof beams on a 3m high roof... Now where is that safety harness, the safety belt, the safety shoes, the safety glasses, the safety overall, the safety gloves, the safety helmet, the safety..........fuggit, by the time I am kitted out I will look like the Michelin man, I'll just take my chances.....
Keep it spinning...
Cheers
Ed