3 bladed head

[TommyBear]

Originally Posted by Freeko

Good lord, who's making a 320A esc?

Special order from YGE.
Essentially 2x 160 HV.

[silas3d]

Originally Posted by Freeko

Good lord, who's making a 320A esc?

I've got one on my Gob770. It is a little ridiculous...

[Danny Dugger]

Roger that. Thanks guys.

[Luvmyhelis]

Yeah, those huge Yge esc's have been out for quite a while. I saw my first one at ProStar hobby about a year ago? And they aren't cheap. For the extreme speed guys these may be barely adequate. The vid of the Gob doing runs above were most likely drawing consistent amps well above 200.

The thing about the Tri rotor head and tail is they give the effects of a much larger disc area with much smaller blades. Same thrust but much smaller blade angles also. Less turbulence. They hit somewhere around 180mph with one of the speed Triabolos as posted at Peak. I don't know about anyone else, but that is freaking fast. With everyone going to the Tri systems, It may not be long before we see someone breaking the 200 mph barrier. Sab is obviously in the mix to compete.

[Pascal-KC]

Any update on commercial availability of the 3-bladed head for the Goblin 700/770?

[sashin]

Originally Posted by Pascal-KC

Any update on commercial availability of the 3-bladed head for the Goblin 700/770?

Ditto....What he asked
Have not heard anything after the initial pics of the head and the Urukay demo.

[Thunder Fighter]

I forgot to ask specifically at Goblin day but I expect it would be released very soon. At HeliMasters they said a couple of months which is around now. They did say there will be kits available to upgrade a Goblin as well as the 3 bladed Urukay option.

//Dennis.

[Icanfly]

Personally I don't even get the novelty of having them on these beautiful machines.

I personally am a total fan of tri blades. Some benefit to 3 is that shorter blades are easier to spin, more agile than two longies, you get more area with 3 smaller chord than two fat, and reports are less cyclic used to get the same effect as two, also quieter.

3 looks cool too.

Nice work on the tri head sab guys. Those holes at the root of the clamps stems, they are for the floating feathering shaft retaining pins ya? I have an old Hirobo Shuttle with retaining plates used for exactly that configuration. I would have thought using bearings on the floating individual feathering shafts something to consider in this high tech age. This way anybody can use any blade they prefer, rigid or flexy.

[Thunder Fighter]

SAB have just posted on Facebook that the 3 blade heads, tails and blades will be available in a couple of weeks. 690-3D and 730-2D blade sets initially.

I am going to order the 730-3D and tail set for my 770 as soon as they are available.

//Dennis.

[Pascal-KC]

Yes, this is my plan as well. What head speed are you planning with the 730-3D blades for what type of flying (sport, 3D, hard 3D, etc.).

[Thunder Fighter]

Originally Posted by Pascal-KC

Yes, this is my plan as well. What head speed are you planning with the 730-3D blades for what type of flying (sport, 3D, hard 3D, etc.).

I will be setting the Heli up for a mixture of F3C competition and sport with lite 3D flying, with the 730-2D blades.

I spoke to Ennio (F3C world champ) at Goblin days to get some info from him on his Urukay setup with the 3 blades as a starting point. He is using these blades but was also going to go back and try the 750-2D blades again as well. I plan on starting the hover setup in the 1050-1200prm area for competition with the aero setup around 1700-1800rpm and probably another setting somewhere in between, say 1450rpm.

I have 750mm Edge blades on my 770 at the moment and can't get where I want with headspeeds due to the resonance wobble between 1200 and 1550prm with the 2 blade head, according to SAB the 3 blade head should fix my issue.

//Dennis.

[Joe Bailey]

I intend to run mine at about 1500 rpm, using a 2 blade head on my g4 I can get some pretty awesome 3d going at this speed. Hopefully the Urukay will alow me go get more response for the harder 3d moves at low speed.

[sashin]

Originally Posted by Thunder Fighter

SAB have just posted on Facebook that the 3 blade heads, tails and blades will be available in a couple of weeks. 690-3D and 730-2D blade sets initially.

I am going to order the 730-3D and tail set for my 770 as soon as they are available.

//Dennis.

What about using existing 770mm blades for a 3 blade setup on the Goblin 770 but running lower head speeds. Can this be done?

[Thunder Fighter]

I know they plan on doing 750mm 3 blade sets but I haven't heard if they are going to do 770 3 blade sets or if they have tested with 770 blades. I guess you could match up your own set but I would stick to lower headspeeds unless the factory release info as they were recommending the 690 size blades if you want to do hard 3d.

//Dennis.

[Luvmyhelis]

Originally Posted by sashin

What about using existing 770mm blades for a 3 blade setup on the Goblin 770 but running lower head speeds. Can this be done?

Yes, it would work as the Sab grips are dampened. The real problem will be finding or sourcing sets of 2 2 bladed 770s that are closely weight matched. On my Triabolo 800 I have flown it successfully as low as 800 HS without problems. There I run NHP blades, which came in close but still needed a good Koll balance to hit perfect cog. Great cog is just as important here as weight matching. The low HS flying is fun, and definitely harder on cyclic management. But I prefer flying the tri at around 16/1700hs myself.

The tri rotor heads run twice as quietly, although they make a unique sound in hard cyclic throws, pretty awesome actually. And, those hard cyclic transitions turn out about a third of the vibes that normally hit two bladed heads. The same movements only need about 10 deg of pitch compared to 13+ on a standard head. The disc feels half again as large, yet is far more nimble!
And, at least on my RcTek tri rotor tail systems that I am running on my 7 and 800. I consistently logged throughout the summer tail vibes that were so low the heli looked like it was setting on the bench spinning without tail blades bolted in at all. All the guys constantly remark about how almost whisper quiet my helis are if I am not flogging them. The Triabolo tri head comes in roughly at $700. I just wonder where Sab's pricing will hit? This will determine if I will try these out this fall or wait till next season myself. I already have three sets of matching 790mm NHP tri's to play with.

[sashin]

Originally Posted by Luvmyhelis

Yes, it would work as the Sab grips are dampened. The real problem will be finding or sourcing sets of 2 2 bladed 770s that are closely weight matched. On my Triabolo 800 I have flown it successfully as low as 800 HS without problems. There I run NHP blades, which came in close but still needed a good Koll balance to hit perfect cog. Great cog is just as important here as weight matching. The low HS flying is fun, and definitely harder on cyclic management. But I prefer flying the tri at around 16/1700hs myself.

The tri rotor heads run twice as quietly, although they make a unique sound in hard cyclic throws, pretty awesome actually. And, those hard cyclic transitions turn out about a third of the vibes that normally hit two bladed heads. The same movements only need about 10 deg of pitch compared to 13+ on a standard head. The disc feels half again as large, yet is far more nimble!
And, at least on my RcTek tri rotor tail systems that I am running on my 7 and 800. I consistently logged throughout the summer tail vibes that were so low the heli looked like it was setting on the bench spinning without tail blades bolted in at all. All the guys constantly remark about how almost whisper quiet my helis are if I am not flogging them. The Triabolo tri head comes in roughly at $700. I just wonder where Sab's pricing will hit? This will determine if I will try these out this fall or wait till next season myself. I already have three sets of matching 790mm NHP tri's to play with.

Roger that
Now to find my heli blade balancer and the kitchen weighing scale
Pricing wise....i hope it will be in the USD$350.00-USD$400.00 range. This is already quite expensive i think...BUT i guess we will have to wait and see what SAB does with pricing.

[TheVortex3d]

Kyle Stacy with the 3 blade Goblin 700
http://youtu.be/R5LGmp6CCR4?list=UUA...lL56c6dOf7LeKA

[Luvmyhelis]

Just wicked. I always marvel at the skill and reflexes the pro's have and how any heli in any brand whatsoever can hold up to the stresses placed on them at this level.

[sashin]

I wonder if the release of the tri-blade head-swash combo will also be on the 20th October when the Urukay is released..

[Thunder Fighter]

I believe so. More info here.

https://www.helifreak.com/showthread.php?t=650692

//Dennis.