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-   -   lets have a sit down, shall we?? (https://www.pprune.org/rotorheads/543165-lets-have-sit-down-shall-we.html)

krypton_john 9th Jul 2014 22:24

... prefer the smell of Jet A1 in the morning though...

An_engineer 10th Jul 2014 00:06

Fun Police,

Ever watched engineers putting the blades on a 350? Imagine the loading through the rotor head after the first blade is installed. No problems at all.

If your question is regarding the load through the blade itself, then watch the distance they droop when ground handling across bumpy ground compared to the distance when a carefully placed bum is only a few inches from the mast.

Most aircraft will handle it just fine. Not much to worry about unless someone falls off.

Fun Police 10th Jul 2014 00:19

thank you for a reasonable response to an honest question (not that there were not others... but some... :}).

fp

lelebebbel 10th Jul 2014 07:18


1)Simply put a short sling around one of the blade!
(aprox 2.5ft from the blade bolt)
2)hook a chainbock to the sling (small 1/2t is more than anough)
3)hook the chainside hook to the eyeloop bolt of the engine
4)run the chainblock until maximum up
5)then have someone pull gently the other blade down (SEESAW)this will lift the engine out of frame mount
6)turn the rotor to clear the engine compartement
7)run down the chainblock until the engine can reach the work stand

this description is highly simplistic!

Here is a video of this procedure (timelapse)



Go to 5:30 for the engine lift

311kph 10th Jul 2014 10:19

damn!!! timelaps trough seasons... they started in late summer, and finished in early spring...
great work nonetheless

Guilders 10th Jul 2014 14:11

Fun police, all joking aside, your are probably well advised to never, ever fly that machine.....the integrity of the rotor head has been compromised and will no doubt eventually fly off the helicopter! The phenomena is referred to as LEIRSO* and is a pretty well known cause of failures in some helicopter types; particularly the Eurocopter A Star models!




:ok:
*Lazy Engineer Induced Rotor System Overloading

vfr440 10th Jul 2014 14:50

206 engine removal
 
Sorry, don't think you've got that right, at least as far as the 206 is concerned. I totally agree with 47guys & lelebebbebel; if you are in the bush then you have to use calculated SAFE (including OHS) methods to get the duff donk out, and the new donk in. The strap/chainblock system which is located close to the root of the blade and actually bears upon the reinforced (doublers) is the only way to achieve that result. The naked engine weighs in at around 100+lbs. Allowing for 2 of us experienced LAE's you would probably get a hernia trying to lift at a lever arm of a couple of feet, and if/when you dropped it what collateral damage to the engine and the airframe would be sustained, in all probability rendering any further flight thoroughly unsafe?


Sorry, think you have got that ALL WRONG - VFR


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