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HomeAircraftHelicopterAerobatic FAI F3C F3N Contest › Compass 7HV with Hirobo Freya head for F3C practice?
03-15-2015 05:06 AM  3 years agoPost 1
bbrc77

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Lancaster, CA

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I have a Hirobo Freya that I was going to convert to electric and I also have a Compass 7HV which I use.

Would it be a good idea to put the Freya Head on the 7HV for practice or not? There are no funds to purchase a dedicated F3C heli so that is not an option.

Your constructive opinions are appreciated.

Thanks.

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03-15-2015 05:12 AM  3 years agoPost 2
RCB49

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Chico CA USA

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hay, first time posting, I also have a 7hv and i really like it, do not know anything about the Freya head is it even the same size main shaft?

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03-15-2015 05:55 AM  3 years agoPost 3
bbrc77

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Lancaster, CA

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I just checked and it is 10mm just like the Freya. What I would like to know is if it is even a good idea or if someone has done anything like that.

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03-15-2015 09:24 PM  3 years agoPost 4
Dr.Ben

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Richmond, VA, USA

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I'd run the stock head, carefully choose your blades, and tune your FBL controller and rates as needed. No need per se for an FAI head any longer in most cases.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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03-15-2015 09:54 PM  3 years agoPost 5
bbrc77

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Lancaster, CA

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Just curious as of why they are not needed anymore. Thanks.

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03-17-2015 03:04 AM  3 years agoPost 6
Dr.Ben

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Richmond, VA, USA

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Rotor head design to an extent is still important, but with FBL the controller makes the model and determines how well it flies. The black art of FB head tuning and tuning has passed in favor of good FBL firmware design and tuning. Rotor blades are a sleeper because of the delicate balance of what is needed for good aeros weighed against hover stability and autorotation reserve.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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03-17-2015 04:14 PM  3 years agoPost 7
Salesmanheliboy

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Nashville, TN

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During the last two US Nats, a pilot used that model (stock). Once (as Ben eluded to) he lowered the head speed for hovering and reduced the rates, the model and pilot was very competitive.

(Agree) Blades make a big difference; even some "CONTEST" blades may not perform as well as other types. I never expected to find me liking dedicated "speed" blades for FAI maneuvers.

(Agree) no need for a dedicated F3C model; just setup and perhaps a set of blades but I'd max out your setup and throw rates first instead of throwing any money at it all.

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03-18-2015 03:51 AM  3 years agoPost 8
bbrc77

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Lancaster, CA

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It all makes sense.

I have the stock blades. Any other recommended? What headspeed should I aim for? I have a Align 750MX 530KV motor and different pinions. Will that work?

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03-18-2015 01:45 PM  3 years agoPost 9
Salesmanheliboy

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Nashville, TN

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Shoot for about 1500 RPMS for your hovering and about 1900 for your aerobatics; that should get you in the ballpark range.

The other thing; set up a hovering only condition. Full low stick should be about -3 degrees and high stick should be about + 8 degrees (center should be about +5 degrees = hovering). Get your pitch curve to look smooth for this range and try it out; you can play with the ranges as you need to get the feel you like.

Good luck.

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04-06-2015 08:10 PM  3 years agoPost 10
bbrc77

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Lancaster, CA

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Thanks. Will do.

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