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Home✈️Aircraft🚁HelicopterHIROBOOther › New life in the Freya X-spec
12-01-2008 06:28 AM  11 years ago
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racingstripe

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Sacramento, CA

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New life in the Freya X-spec
I put the new SSZ-IV on my Freya X-spec, in a word... WOW!

Compared to the stock FFZ-II rotorhead the cyclic response of the SSZ-IV is much greater and most notably for me it is much quicker off center. Aside from collective pitch adjustments during setup, all of the settings in my radio carried over from before with the stock X-spec head. I had to apply several percentage points of EXPO to tame the cyclic response a bit. Furthermore, I used the third hole on the flybar carrier which is slightly more flybar input (greater stability) than the recommended second from inside hole. The flybar is the stock X-spec one, 555mm with stock paddles and no weights.

After flying a SWM Sceadu (CCPM) for a couple of flights I found it would take a minute or two to acclimate to flying an HPM Sceadu. Really kind of annoying. Knowing this I didn't expect much from my setup since the X-spec is HPM - mechanically mixed. However, I'm pleasantly suprised, I can switch from a SWM heli to this one with little transition time.

I've been looking for a used Freya with the SWM (CCPM) upgrade but no luck in landing a deal (as of yet). In a way I'm glad as it saved me from having to buy three new servos and a new Rx. Put to work are 9252's on the cyclic's and a 9451 on collective coupled to a PCM Rx/Tx. The SWM upgrade is on hold for now.

Also new on the heli is a fixed 6v voltage regulator from Perfect Regulators. Everything is running on 6 volts including the T/R servo (S9350).

The engine is a 91SX-h c-spec with the pump and carb from a 91SZ-h.

andy-

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12-01-2008 07:47 AM  11 years ago
pcmpete

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Phoenix,AZ

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Nice setup, can you post close up photos of your front mounted tail servo, please Pete B
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12-01-2008 08:29 AM  11 years ago
racingstripe

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Sacramento, CA

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Yes.

A quick note about the parts diagram... I drew that up for the Sceadu using the Shuttle SE/RG-M rudder servo mount aluminum parts that use a 2.6mm bolt.

For the Freya I used a 3mm bolt so the collar part number is different. I don't have the number immediately handy. However, it's the same collar as used on the washout mixer arms.

andy-

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12-01-2008 02:37 PM  11 years ago
MRC-Hirobo

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Edison, NJ

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your setup looks great.
Greg
MRC Host
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12-01-2008 06:21 PM  11 years ago
racingstripe

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Sacramento, CA

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Thanks Greg!

BTW... the p/n for the 3mm ID collars is: 2521-094

Moving the T/R servo up front will likely make the heli nose heavy. I'm nose heavy running a 2 cell 1500mah lipo, although in flight it doesn't seem to be an issue.

andy-
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12-01-2008 08:42 PM  11 years ago
racingstripe

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Sacramento, CA

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By request...

This part is probably overkill for the purpose but it was fun and educational to make.

Step one was to make a blank of CF angle. There are five layers of CF cloth that make up the angle. The outside (top and bottom) layers of CF is your standard 3k 2x2 5.9oz CF cloth. The inner three layers is a heavier 12k 8.9oz unidirectional cloth (Hexcel GA090).

The layup is important. You need strength across the angle rather than down the length. Two of the inner unidirectional layers have the carbon tows run across the angle.

The epoxy system is one that will tolerate the inside of a car in California during the summer. Most hobby grade epoxies begin to loose their mechanical properties at about 110F.

The CF cloth is wet out one by one, one on top of the other starting with a mylar sheet, the 5 layers of CF and finally a mylar sheet on top. Air bubbles are squeegeed out from under the mylar and the whole mess is clamped between two 1.5" x 8" pieces of angle aluminum thus forming the angle. The epoxy will cure at room temperature but to achieve the final properties of the epoxy it has to be post cured at temperature.

Once post cured the CF angle cuts easily with a Dremel diamond saw. Don't breath the dust! Holes are drilled with a carbide drill and the .250"x90deg countersink is also carbide.

The (3) 3mm flat head bolts that mount the bracket to the main frame can't be very long or they will hit the fore/aft servo.

andy-

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12-02-2008 12:08 AM  11 years ago
Dr.Ben

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Richmond, VA, USA

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Fine craftsmanship here....

For whatever degree of noseheaviness you may have now with the servo up front, you'll be better off later on if you coose to upgrade to a 520, Spartan, or similar one-piece affair.

Ben Minor
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12-02-2008 12:24 AM  11 years ago
F3CWNB

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Napier, New Zealand

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Racingstripe

That's a work of art Look's like something that Hashimoto would be happy to have on his machine Well done!!!
'Life' is Looking Up!!!
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12-02-2008 01:55 AM  11 years ago
Agilefalcon

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Fort Worth, Texas

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Well done! I am indeed impressed.

My X-Spec is also sporting the new SSR-IV head and has CCPM conversion.

The new head is amazingly stable yet has great snap - just what we were looking for. I found I could do a pirouetting pie-dish and only needed to bump the stick once every revolution. I was shocked!

I think if more people here about this awesome new head and the fact that MRC are packaging it with everything you need to bolt it on to any Freya or X-Spec, more people would be out there trying it.

Sure, it costs a little money, but not as much as a new heli - and it will transform your machine with something beautiful too.

Chris.
Chris Berardi
Team BobbyJack's Hobbies
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12-02-2008 07:47 AM  11 years ago
racingstripe

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Sacramento, CA

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Thanks guys!

I've been using the front T/R servo as you see it since about '06. The setup has been holding up well.

Chris,
I found I could do a pirouetting pie-dish and only needed to bump the stick once every revolution. I was shocked!
Yeah, me too.

While I can't do a piro pie-dish I can do piro flips and found out just about the same thing. If there is anything negative to report it's if you're at all ham fisted on the cyclics, you'll see it and the flying gets ugly. I guess that's more of a strike against the pilot...

andy-
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12-02-2008 09:11 AM  11 years ago
Brendan78

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NSW Australia

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I've got it setup on my Freya Evo OP2 and love it as well, awesome heli. Just running in a new OS91HZ-PS with SB20 at the moment so that should give it even more kick
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12-02-2008 09:38 AM  11 years ago
bexander

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Gothenburg, Sweden

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racingstripe: The plastic ring mounted round the tailboom holding the M3 bolt. From which parts is it made?
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12-02-2008 03:17 PM  11 years ago
racingstripe

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Sacramento, CA

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The plastic ring mounted round the tailboom holding the M3 bolt. From which parts is it made?
From the stock plastic T/R servo mount.

Here's a pic:

Proofread carefully to see if you any words out.
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12-02-2008 03:38 PM  11 years ago
bexander

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Gothenburg, Sweden

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racingstripe: Do you have the partnumber?
I have a Freya EVO and it has another servo mount for the t/r.
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12-02-2008 03:49 PM  11 years ago
racingstripe

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Sacramento, CA

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bexander,

0414-135 'rudder servo mount'

andy-
Proofread carefully to see if you any words out.
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12-02-2008 05:09 PM  11 years ago
Big Electrics

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New Jersey

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QUESTION ?
Could this setup be done on the .50 Evolution?
I only need one!
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12-02-2008 06:52 PM  11 years ago
racingstripe

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Sacramento, CA

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Yes.

http://www.runryder.com/t210370p1

Proofread carefully to see if you any words out.
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12-03-2008 01:32 PM  11 years ago
bexander

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Gothenburg, Sweden

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Thanks!

This will be an excellent mod for my electric converted Freya as I then can mount the batteries a bit further to the rear.
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12-04-2008 02:08 AM  11 years ago
monyet

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Singapore

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Nice job racing stripe. What was the reason for making the tail servo mod?
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12-04-2008 06:59 AM  11 years ago
racingstripe

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Sacramento, CA

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Ruined an 8700G and 9254 from oil getting into the motor. Was like someone filled the gearbox full of molasses.

Both servos finally bit the dust in flight. Luckily they just froze up around neutral so the ensuing auto wasn't too exciting.

andy-
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