Couple of questions

[Oli]

I have recently finished building my Raptor 30 and wanted to know how tight are you meant to do up your main blades? Is this just a judgement thing, untill they feel firm or are there any torque settings? Next just out of interest what do the thrust bearing actually do? apart from being a pain in the a!!e to get in without falling to bits. Also are you meant to lubericate any parts of the heli?

Many thanks

[David Drew]

Blades...mainly a feel thing, but a test is to hold the heli with the blades parallel to the ground & side on (hold the skids and head), then jolt the heli down and stop quickly, if the blades fall under the load they are too loose. You will get the idea of the feel when someone has shown you, meanwhile try the 'bump' test above. They should rotate under pressure, but not 'stick'.

The thrust bearings take the outward thrust of the blades caused by centifugal force. At approx 2000 rpm, that weight really is something to have to hold back

A little machine oil on the main shaft and tail rotor shaft where things slide is really all.

I'm still fairly new to all this, and have a Raptor too, so better advice is prob on it's way

David

[Oli]

Thanks for your quick response david

[David Drew]

No probs...some much better advice on it's way I have no doubt.

By the way, that was three (no, delete that, six)questions...cheaper by the dozen

[Ade_Law]

you got it pretty much covered david!

i use tri-flow oi from quick UK to lube the mainshaft and tail shaft

Ade

[David Drew]

you got it pretty much covered david!

i use tri-flow oi from quick UK to lube the mainshaft and tail shaft

Ade

Phew I learn't (almost) all I know from you....

[Nutz]

The thrust bearings take the outward thrust of the blades caused by centifugal force. At approx 2000 rpm, that weight really is something to have to hold back

Strange that I did some calculations tonight here are my results

My main blades at 2050RPM
41.53st on the grip (I wieght aorund 12st)
323 MPH tip speed
33 RPS (revs per sec)

Tail blades would be doing 17,455 RPM
20 stone
532MPH tip speed
17,455 RPM
291 RPS (revs per sec)

[robgt]

Tut tut tut...
You have to show your "working out" these days mate
LOL
Cheers,
Rob

[David Drew]

41 1/2 stone

Bl**dy hell. On a grip!! Wow. All I can say is....I'm getting even further away from now on.

Will have to get some binoculars to fly my Raptor now!

David

[moyesboy]

wow!
forces on the blades grips measured in Stones!
yuo won't see that on Runryder

so how many stones on that M2 caphead on your trex feathering shaft?

[robgt]

1 stone = 6.35029318 kilograms
According to your friend and mine... google

Cheers,
Rob

[Nutz]

Tut tut tut...
You have to show your "working out" these days mate
LOL
Cheers,
Rob

There you go http://www.fraserker.com/helilessons...ade_Forces.xls

I must admit the only part I guessed was my tail blade weight and I run 2050 on a 8.7 ratio (96/11)

[robgt]

Good old Nigel
Cheers,
Rob

[Nutz]

Just relised, the tail blades are turning as fast as the engine