Rotor direction?

[Sonnyj]

Ok fellers
I got a realy dumb guestion for ya.
See'ns how all rotors turn anticlockwize or ccw, or at least the ones I've seen do.
Why? Will the rotors work the same in a clockwize rotation?
The reson I'm askin this guestion is, I'm lookin at makin a prerotator and I want to get away from the reversing gear like the wunderlick (scuse my spellin) has. Wot I'm thinkin on is a little 2 cycle motor like a weed eater or chainsaw to drive through a standerd Bindex and ring gear. I never thought of it before but I dunno. Can anyone think of why it wont work? :confused:
Thanx
Sonny

[bones]

Hi Sonny, prob no reason why it wont work, one question for you thou is do you really want the extra hassel of starting another motor, then trying to concentrate on two engines then having to turn the RIGHT one off ???? just put a starter motor on it, as it would be no where near the weight, and its just a push button to hold on or off. I have a wunderlich on mine and its a bit of a pain sometimes when there is no wind and a short strip to try and hold the brakes hard enough with the motor pushin, holding the prerotator on hard enough to stop it slipping and all the time makeing sure everything else is right to go and i mean it got to be right, if your flooring it to get of short..Just my two cents worth back to now :beer: or maybe i'm just a :girl:

[russ]

Sonny............true story here

Had a newbie do a couple of hrs with me, doin the basics etc, taxying windin up blades, onto mains,bunny hops etc etc. He got called back to his station urgent like, so training was cut short. A few weeks later he takes delivery of their new gyro. He gives me a call to make a time for me to fly out there and continue his training. Get another phone call a week or 2 later......hey russ, been taxying up and down the strip here......buggered if I can get the blades wound up mate.......and I'm goin like hell mate.
Wait for me to get there ina couple of weeks I say
2 weeks later I fly in, no sooner get out of me gyro, and he's got the new one out of the shed, onto the strip. Look he says, I'll show you.......hits pre rotator, runs down the strip, gets to the far end and comes howling back bowt 60 knts, at a guess. Blades doin bugger all.......I couldn't believe wat he was gettin away with here. Mate I says, when the #$%^@ did I show you that, to get em goin mate
A look of embarrasment now shows

Then I see the reason for the problem............bloody blades had been installed on the head UPSIDE DOWN

True story mate

I reckon bowt now He's got couple thousand hrs up.........never had anymore probs.......never

Log books..........wata them things

[BeefBear]

Sonny, As I understand it, not every gyro designed has their rotors turning anti clockwise. Most turn ACC but not all. And as Russ indicated make sure you have a set of rotors running the right way up.

Ted

[Birdy2]

C Beaty reckons a rotor blade can still autorotate in reversed airflow, or upsidedown, just not as effectivly as the right side up. :confused:
Pondered it for a bit and I reckon he'd be right.

[Sonnyj]

Russ mate
Its mity hard to type with tears in me eyes. Upside down HEHEHEHEHE oh jeez my isdes huert,upside flippin down?
Tthank you mate I aint laffed so hard for so long sence the last story ya told . ( still laffin) Oh criky caint stop laffin every time I think about that I start up again.
I'll come back later when I settle down
Great stuff
Sonny
Ok I think I'm better now.
Thank you Russ, I've realy had a hard couple of weeks here and your tale is just wot I needed. :lol:
Yea mate I think that feller may have been takin the phrase" livin in the land down under" a mite too seriously. :rockon:
:focus:Yup I understand the rotors go on with the round side up an the flat side down, no prob there.
Just seems to me I can lose a little wieght gettin rid of the reversing gear. But not knowing all the tech stuff I figured I might better ask.
I'll work out all the kinks as I go along but I am going to keep the gyro as U\L leagle eg 256 LB. If I use a electric starter motor I'll also need a battry and some heavy cable to get the juices flowing to it. My old Mac runs on a magnito and I have nothing on the gyro that reguires a large amount of currint to work. I'll have to get all the stuff together and weigh it all before I make up the prerot.
Man I can just see the look on your face Russ, watchin this guy come screemin down the runway. :yikes:
:cheers:
Sonny

[russ]

Never borin round my camp fire mate.......mite rite a book one day.........cheers

[ main problem is that a lot of the goins on over the yrs, was a tad nawty......wink, wink]

Gota heap of photos, but the old style photo........not digital stuff, therfore can't email em

[hoody]

hey russ, bring any pix you want to put on a computer as i lashed out and bought a second hand scanner from cash converters.
hoody

[Bob]

Um ok turnin the rotors the other way arround ... won't that mean a set of rotors made for the job ? I've made enough mistakes in makeing me Props to know ya can make them in eather direction... but they only work right in ONE direction ... RIGHT ???? I mean I could see adjusting the pitch of my dorotblades to neg 3 degrees and turning them backards .... they just might work too ... seeings as the top airfoil shape isn't that deep ..... but it would take makeing a new set of rotors to do it right I'ed think !
... I certainly see no reason why ya can't turn rotors clockwize but they gott'a be made for that ... if ya take the normal rotor blades and turn them backwards your drag will be a bunch more than they normally would be simply because the trailing edge is now the what used to be the front of the blade and it don't taper neas as nicely to get rid of that turbulance ....

So I think.... yah Sonny it'll work but ya need new rotor blades to do it right
.... corse if ya have long rotors you can modify them eh ? chop off the end and flip them end fer end ! ???? hehehe OOOOh shame on me fer even thinkin dat ! te weights all wrong and so is the striength of the blade ..... best build new ones mate !
.....
heres a thought .... Sonny ! run your little 2 stroke engine backwards ! .... change the timeing and pull rope and your in like flynn !
that way you don't need to change anything on the gyro .... problem solved ! hehehehehehehhehehhehe
.....

and that 2 stroke is about 2 lbs if that ...alot lighter than a starter motor by the way ...
and Sonny don't have a battery on his gyro eather... add the starter cables switches and battery and you got alot of weight ... he be trying to stay within part 103 here ! ... why I have no idea HEHEHEH ! but hes trying !
....
he'll be back from ROC soon i think maybe he'll have som pic;s for us ?

c ya !

Bob.......

[Mitch]

Hey Bob,

Cant you just take a 'blank' extruded blade and strap it from the opposite end , that you normally would, then have it rotate clockwise.

Watch that glue Mate, it's no good for ya. :crazyas: :peace:
Cheers,

Mitch.

[Bob]

I suppose ya could if ya changed the weight in the tip and the mounting brackets and all dat ....
but thats a BLANK extrued blade.... a blade in Use would have to be reworked alot ,,,, gettin the weight out'a the end might be tough don'tcha know ! .... not to mention all the holes you'ed need to patch up on the other end !
.....
yup i think dat reson is a gettin to me ! hehehehe
C ya !

Bob......