Rotor Blades +/- - Page 2

Aussie_Paul · 07-08-2006, 09:18 PM

Quote:

Originally Posted by russell

Hey paul..........see your little sign off man is rugged up and shivering a tad....

by chance, you wouldn't freezin ya tits off down your way....................bewdy

bleedin cold up ear to.............18 last nite........unreal aye............freezin

Russ said, .............18 last nite........1.8 here!!!!!!!!!!!!

I have a head cold and flew 5 hours over the weekend in a single seat Domiunator style with a pod. Some people never learn. I got no sympathy at all at home last night!!!!!!! BUT I had a great time flying with friends, one who has not woken up yet and has a trike. A Tif next week might convert him.

Next week I begin training the guy from Canberra who bought the U beaut $58k gyro here in Ballarat.

Aussie Paul.

Sonnyj · 08-08-2006, 12:29 PM

Paul
I got no sympathy at all at home last night!!!!!!!
Wellcome to the real world, and my house

All kiddin aside, I hope you get to fellin better soon.
Cheers
Sonny

Brian · 08-08-2006, 05:28 PM

Bones,
Pictures wont help you much as the difference between the tapered and twisted and straight blades are not all that visable.
Rob is probably the best bloke to get the facts from. The only thing I found with Robs hub bars are that they vary a bit which is disconcerting cause they should all be the same.
Anyway, going by what Birdy said about you being over rotored, I reckon a foot shorter, tapered and twisted would be the go but I would not sell your present rotors till you test the new ones !!

I was flying 28 ft AKs and have gone back to the Patroneys 26 ft 6 in and they are far far better for mustering, no comparision !!

bones · 09-08-2006, 08:27 AM

Ok Brian, so you went from 28' AK's to 26'6" Patroneys,,,, so do the Patroney's, can they handle quick full one side to the other side, with out shakin like a dog sh*tting razors, cause i was just talkin to a guy last night who flew a light weight gyro with 28' AK's and he said there was no shake side to side.. just wondering which way to go.

Aussie_Paul · 09-08-2006, 10:23 AM

Good morning people and Russell!!

IMHO Ak's don't shake because they have very little pitch, and hence less lift, hence don't have to work as hard.

FWIW I would be interested Ii I were a musterer to try some AKs with 1.5 degrees and say 2 degrees of pitch and see if they shake. If not, then the extra lift would be advantagous, but I reckon they would shake.

Aussie Paul.

bones · 09-08-2006, 11:38 AM

Quote:

IMHO Ak's don't shake because they have very little pitch, and hence less lift, hence don't have to work as hard

So why do they seem to be able to do the same job then, im getting more confused, the more i think about this subject..

Birdy2 · 09-08-2006, 12:07 PM

Bones, all you gota do to increase the pitch/lift on blades that have a low pitch set in is to pull that stick back.

Pulln the stick back in pitch has the same effect as side t side as far as the blades are concerned, its cyclic input. [2 cycles per rev]
The faster they are spinin, the more cycles per second, more cycles per second means the pitch changes need not be as great to have the same effect.

Brian · 09-08-2006, 02:09 PM

Quote:

Originally Posted by bones

Ok Brian, so you went from 28' AK's to 26'6" Patroneys,,,, so do the Patroney's, can they handle quick full one side to the other side, with out shakin like a dog sh*tting razors, cause i was just talkin to a guy last night who flew a light weight gyro with 28' AK's and he said there was no shake side to side.. just wondering which way to go.

Bones, quick side from side is probably more to do with the size of the rotors rather than how they perform, but in my case, yes, Robs blades are able to be pushed a lot quicker from side to side than the 28 AK's.
Personally, I like Robs blades better BUT the results can vary from one gyro to another eg, the same blades might be smooth as silk in one gyro and as rough as guts in another gyro. Rob built me a new hub bar, I sent him the blades but they were no where as smooth as the original hub bar! [Rob cant work it out iether

]

It would be interesting to give the AK's some more pitch and see what the results are, I reckon it would try them out for shake. I have a set of Ricks 27 fter's which need a new hub bar and cause Geoff builds his hub bar the same ar Rick did, I will give Geoff the job and ask him to pitch them at 1.5 or 1.8 and see what happens, I reckon originally, they had about 1.5 but I might be wrong!

russ · 09-08-2006, 05:30 PM

YEARS............back, most blade makers.....ie Rotorhawk,Benson,Jack Allens,Larkins............all made blades that you as the pilot could easily change blade pitch to SUIT YOUR applications.

Hub bar at each end had blocks top and bottom, with oversized holes. Blades had block at the ends with oversizes holes.
You butted these together, [ blade to hub bar ] inserted the joining bolts [4 ] and rotated the blade around the loose bolts, this allowed you to set whatever pitch you wanted, then you tensioned the 4 bolts up. Do the same to the other blade...................bingo, go flying.

Why this practise stopped beats me............

bones · 09-08-2006, 08:43 PM

hmmm yes Russ thats right, good point about those blades,,,,,, hmm you just got me thinking about that,,, might look at putting that attachment system, in these rotors cant be hard,then as you said just adjust it to suit.