RunRyder - Good blades for F3C?

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Aerobatic FAI F3C Contest > Good blades for F3C?

Andreas
Veteran
Location: Sweden

Hi.
I'm going to compete next year and i wonder what blades you guys running?
The machine is a Raptor 90 and i'm going to use 680-700mm blades.
Is there any difference between semi- and symmetrical blades in hovering? Which is better?

cheers Andreas

11-08-2003 Over year old.

G.Man
rrProfessor
Location: Northants, but soon to be Nicosia, Cyprus

S profile were always what I used in the good 'ole days..

used to be called reflex blades then...

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11-08-2003 Over year old.

Andreas
Veteran
Location: Sweden

S profile?
Never heard of that but i guess they are not symmetrical then?

Cheers Andreas

11-08-2003 Over year old.

G.Man
rrProfessor
Location: Northants, but soon to be Nicosia, Cyprus

they are semi with the trailing edge lifting up..

great for right way up and limited upside down...

designed to create more lift and great in autos...

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11-08-2003 Over year old.

Secret Squirrel
Key Veteran
Location: New Zealander living in Melbourne, Australia

I've always used Symmetrical ones.

On my Tempest I've tried Rotortech 720's which were good, but required a higher headspeed (1550+) in hover to stop the machine wobbling.

I'm now trying MS 710's again and I've been able to get it easily down to 1450 in hover with no problems.

Both performed the same in aeros and autos.

Si

-------------
Simon Lockington

11-08-2003 Over year old.

HOMEPAGE

Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

Si,

It's interesting what you felt with the MS's compared to the RT's. I borrowed a set of the MS's and was very disppointed in their performance compared to the TZ91II's I had been using. Top speed on the model dropped noticeably, and the hovering performance wasn't as good, esp in the climbing/descending piro maneuvers. Vertical carry-through follwing the roll in the RST's went to crap also. I haven't yet flown the RT's, but I've spent enough time beside pilots flying them to comfortable in ordering them for next season. Wayne Mann was VERY pleased with their aero performance, and the only issue in hover was a little less ability for the model to sit still on cyclics. Collective feel was said to be improved over the TZ's. Gordie wasn't pleased with the way the RT's rolled, but we may have isolated an outside cause for his particular rolling problem.

I still can't for the life of me figure out why you're getting that mast bump at anything below 1550 with the RT's. Two of my fellow competitors have been easily able to get down to 1500, with that rpm seeming to be comfortable for the blades and not being chosen as the floor for avoiding a mast bump. Must be something about "down under" .

Finshed up the Tempest flight report article?

Ben Minor

11-09-2003 Over year old.

Secret Squirrel
Key Veteran
Location: New Zealander living in Melbourne, Australia

Gidday Ben,
I should probably fill in some gaps here. After a while I put the 60 duro o-rings in the head and shimmed it up to get it tight. I like the feel of a tight heli and although I was expecting a reduction in hover performance it didn't seem to affect it as much as I thought.
Once I did this, I had to run the RT's at 1550 to stop the bumping. Prior to that, I could get it down around 1500 with not too much trouble.
I know that most guys have the best success with a softer head, but I have real trouble in the aeros with a soft head. Now it's going really nicely.

To be fair, the flights I did on the MS blades on the Tempest were done in NASTY NASTY winds, so it was pretty difficult to identify any differences due to the blades.

I have however done all my Vigor CS flying with the MS 710's which prior to a few months ago, was my F3C machine with fairly good success.

Now, I'm pretty sure I'm probably not at the level you guys are with your flying and certainly Wayne is MUCH more qualified than I to make a call on the RT blades. For me however, I didn't notice a large difference. However like I said, I was flying in crap conditions. Hopefully before I go to Aussie I'll have a better opportunity to try it out. It should also be noted that I didn't have any bad experiences with the RT's it's just that they don't handle things too well when you have a small tip over at the bottom of an unplanned auto 200 meters away whilst flying fast backwards

As for the Tempest article, all done! Sending it out on the newsletters tonight!

Si

-------------
Simon Lockington

11-09-2003 Over year old.

HOMEPAGE

MAH Blades
Senior Heliman
Location: NEW YORK

MAH

WHY dont you try new MAH G2 710mm DT or 700mm DT

11-09-2003 Over year old.

panzer
Heliman
Location: Falkoping, Sweden

Hi

I use the SAB #204 semisymmetical blades. The blades are a little short, 675mm.
This is the best blades I´ve used to this date.

FAI-F3C!

11-09-2003 Over year old.

HOMEPAGE

RotarSoft
Veteran
Location: London UK

Hi,

I found the TG Tapered Symetricals a great all round blade and would probably suit the Raptor very well. I've also run the TG Contest blades which worked well on my Hirobo and JR machines but I've heard people don't get on with them so well on the Raptor.

Currently I'm running 70cm NHP Razors on both my Sylphide and Vigor and they're working really well. Just got some special heavy FAI ones made and due to go testing soon...

Cheers

Mark

11-09-2003 Over year old.

Andreas
Veteran
Location: Sweden

Thanks for all the answers.
The blades that i easily can get here in Sweden is TG, SAB and Razor so probably i'll try one of them.
I can't run 720mm blades with 105mm tail blades on the Raptor so i guess it will be 700-710mm.
Thanx again!

Cheers Andreas

11-09-2003 Over year old.

G.Man
rrProfessor
Location: Northants, but soon to be Nicosia, Cyprus

http://www.ronlund.com/Merchant2/me...ct_Code=TG700SS

They are the S aerofoil blades for F3C

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11-09-2003 Over year old.

Andreas
Veteran
Location: Sweden

Thanks alot Galifrey!

11-09-2003 Over year old.

Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

Andreas,

I'd avoid those mild S TG's if I were you. They used to be flown here in the US more than a few years back but were completely abandoned because they were VERY unpredictable in hover in windy conditions and had an annoying tendency to pitch up in the inverted portion of a roll. They are very fast and auto extremely well, though. Gotta have a blade that hovers well, though, to compete.

Ben Minor

11-09-2003 Over year old.

RotarSoft
Veteran
Location: London UK

Ben

You're quite right.. they fly very fast and auto great.. but hovering and aerobatics are not that good. My dad had some on his standard Vigor for a while, but has now gone back to the Tapered Symmetricals which work much much better.

Cheers

Mark

11-09-2003 Over year old.

Andreas
Veteran
Location: Sweden

Ok thanks.
Then it's probably between Razors or SAB blades.
I ran 680mm Razors on my first Raptor 60 and they were really great in 3D, but i don't know how good they are for competition hovering.
I have no experience with SAB blades.

Cheers Andreas

11-09-2003 Over year old.

Optech
Key Veteran
Location: Vista/Oceanside, CA.

Does TG still make the tapered symetricals? I don't see 'em listed anywhere anymore.

After going .91 engines, the 690mm I have are a little short. Do/Did they make a longer version? I really like how they fly but if the TGs aren't available????

I have the TG 700mm Contest now and am going to give them more flight time before I decide but I want to try the MAH 710 DTs' and the 720 Rotor Techs on my .91 ship.

Mike

Viva La Airtronics!

11-09-2003 Over year old.

Krister T
Heliman
Location: Sweden

Andreas
I've got very good result with the SAB 204 rotorblades especially in the hovering manoeuvres. They are not so sensitive to wind as the Gamma 700 and the TZ91 II's is.
The SAB 204 isn't any speedblade comparing to the TZ91.
The down thing with the SAB 204 is that they don’t auto so well.

Si
I had a pair of gamma 700 that mast bumped allot compared to other gamma 700's.
But after that I had balanced them on the koll rotor so did the mast bumping go away.
What I noticed on these blades was that the chord wise c.g. was way out.

/Krister

11-09-2003 Over year old.

HOMEPAGE

G.Man
rrProfessor
Location: Northants, but soon to be Nicosia, Cyprus

Optech

http://www.motorsandrotors.com/Product_Pages/blades.htm

69cm Tapered Sym The Best Sym Blade! £69.99

and mchristys faves

70cm Semi-Sym Contest blade Mark Christy/Dave Wilshere £74.99

If thats what Dave and Mark use I would be inclined to follow their recs...

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11-09-2003 Over year old.

RotarSoft
Veteran
Location: London UK

Optech,

Don't worry about blade length.. Kunni and Kobayashi were both running 675mm blades at the worlds on their sylphides, and I was running 680mm's myself..

I've found if you go too long on the blade the model gets less steady in the hover.. probably due to lower blade loading.. I've found that 700mm's on my Vigor work well.

My recommendation is try with the 690mm Tappers Symmetricals or the 700mm Razors. I don't think the TG Contest blades will suit the Raptor rotor head.

Cheers

Mark

11-09-2003 Over year old.

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