HK mossie maiden worry - Printable Version
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+--- Thread: HK mossie maiden worry (/showthread.php?tid=393)
HK mossie maiden worry - sglnichols - 02-07-2011
Hi guys....was hoping for an answer on this from someone with more knowledge than I!....
I have one of the HK mossies and am setting up (weather permitting) for the maiden tomorrow.....
I do have another bit of a concern.....since swapping to the MAS props.....my prop nose cones (and the props...? hard to tell) have a bit of a wobble to them....god knows how this happened....either the nut behind the backplate is not sitting flush (I epoxed the nuts to the backplate) or the backplate has become a bit distaughted. However I'm in no mood now to investiage as I took ages to 'fatten out' the prop shaft with a few layers of heatshink to enable the wider shaft hole to fit the prop shaft (this has worked for me quite well in the past)........
may as well make use of the iphone....
I've uploaded the vid of the 'offset prop'.....the other side is not as bad. The prop shaft is DEF not bent....
What do you guys think?? I am risking it? There is no abnormal noises upon rotation at high speeds.
http://www.youtube.com/watch?v=KShHSiT5uT0
Cheers all......
RE: HK mossie maiden worry - Skidz - 02-07-2011
The prop appears fine. It seems like the spinner only isn't perfectly aligned. I doubt that will cause any adverse vibrations.
RE: HK mossie maiden worry - samste - 02-07-2011
Yeah the prop looks balance, i guess the best thing would be to get the nose cone back plate balance right and all spinning nicely then you will be sure not to get unwanted vibration and any issues that may arise.
But running low Kv motors tends to be more forgiving on unbalanced props and bent prop shafts etc and should be ok.
Whereas an unbalanced prop, prop adapter or nose cone on a high kv causes massive vibration and snaps motor shafts let alone stress out motor mounts and everything else.
(Eg my speedster glider, snapped 3 shafts from unbalance prop or in balance prop adapter)
RE: HK mossie maiden worry - sglnichols - 02-07-2011
Cheers guys.....unfortunately ive had the odd wine since putting the tools down&now lacking motivation&a steady hand to investigate further!ill take it down the field tomorrow2see wot u all think&see what happens
Cheers
Si
RE: HK mossie maiden worry - gbanger - 02-07-2011
I would be checking everything mate.
The whole thing looks out of sortes to me.
There is no way I would be flying a new aircraft with a wobble as obvious at that.
Vibration and/or imbalance is the major cause for electronic and/or mechanical failure.
Sort it out and get it operating smoothly before it hits the sky.
RE: HK mossie maiden worry - brotherblonde - 03-07-2011
I had to leave the field today before Simon's maiden flight.
Was there a maiden?
If so, can anyone give a report?
Thanks.
RE: HK mossie maiden worry - Skidz - 04-07-2011
No maiden. Darren's advice.
RE: HK mossie maiden worry - sglnichols - 04-07-2011
strip a bit too boggy Andrew.....Am happy to wait for a firmer strip....