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HomeAircraftHelicopterHIROBOOther › Which to buy? EX / D3 high torque clutch?
04-01-2009 05:19 AM  9 years agoPost 1
Qooo

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Hong Kong

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I went to our local hobby shop to check the high torque clutch for my Freya Evo90. I found there are 2 look the same with just littel different from the steel tube inside the clutch.

What is the difference between them? Which one should I buy? I copy down the model numbers as follow.

1. 0414-440 EX high torque clutch.
2. 0414-475 D3 high torque clutch.

Do they still have the problem with the defective bearings? I remember when it first came out, the high torque had the issue, right?

Many thanks,

DX7 - FREYA EVO90 SWM - LEPTON EX 6S - LOGO400 VBAR 6S - LOGO600 VBAR 12S

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04-01-2009 11:57 PM  9 years agoPost 2
Dr.Ben

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Richmond, VA, USA

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414-440 is the one that I know will fit your Evo.

I'm not sure what the distinction between that one and the D3 variant is, though I might hazard the guess that the inner sleeve may be of a different length. I'd need someone to chime in here who has held both variants in hand. All of mine are 440's.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-02-2009 01:39 AM  9 years agoPost 3
Qooo

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Hong Kong

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I had looked at them inside the polybags side by side. They looked exactly the same excepted the inner sleeve. The inner sleeve had the same length and same size but there were different rim at both ends.

If 414-440, I should take this one then ...

Thanks for your reply!

DX7 - FREYA EVO90 SWM - LEPTON EX 6S - LOGO400 VBAR 6S - LOGO600 VBAR 12S

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04-02-2009 02:46 AM  9 years agoPost 4
MRC-Hirobo

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Edison, NJ

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The metal tube in the D3 is a few MM longer on the top. Other than that they are basically the same.

MRC Host

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04-02-2009 03:35 AM  9 years agoPost 5
Qooo

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Hong Kong

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You mean I cannot use D3 clutch, right?

Thanks,

DX7 - FREYA EVO90 SWM - LEPTON EX 6S - LOGO400 VBAR 6S - LOGO600 VBAR 12S

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04-04-2009 12:22 AM  9 years agoPost 6
Dr.Ben

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Richmond, VA, USA

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Sleeve clearance between the middle and lower bearing blocks is close with the 414-440 in a Freya. With what Greg posted, the D3 variation is not going to fit up in the Freya chassis.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-04-2009 01:16 AM  9 years agoPost 7
cmir2425

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miami, fl usa

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Its weird that the new eagle3 aocc uses the d3 hub instead of the freya one. They must have made some changes then.

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04-07-2009 10:35 PM  9 years agoPost 8
Tom Retzinger

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Lincolnshire, IL

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It appears there is one major difference in the new D3 auto hub. It is set up for 3.5 mm cap screws going into the main shaft, unstead of the 3 mm cap screws on our Freyas, X-Specs, Evo 90, etc. So it has larger holes machined into the D3 hub for these screws. You definately would not want to use this D3 hub with our 3mm screws going into our main shafts tapped for 3mm screws. There would be too much slop, or play in this, leading to engagement shock to the system.
That said, I know of one person who lost his Freya 90 Evo due to these 3mm bolts shearing off. Has anyone else had this problem? Is it worth the time to either drill out the threads in the main shaft and put a longer, shouldered 3 mm bolt all the way through, so there are no weak threads in the sheer area? Or perhaps, machine the hub and main shaft to take 3.5 mm screws?
Tom

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04-07-2009 11:12 PM  9 years agoPost 9
Dr.Ben

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Richmond, VA, USA

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Shearing of the 3mm bolts is surely not a common issue, but I can see several ways to predispose the hardware to failure.

Obviously, if the bolts get too loose, they'll shear in a manner not unlike you decribe if 3mm hardware were used in the D3 hubs. Second and likely more common, many guys gorilla tighten screws. If this is done with a stout hardened allen driver, it's easy to stress/stretch the threads on the screws, predisposing to failure. I tighten mine to 12 ounce-inches with a torque wrench and stop there.

The use of 3.5mm hardware is clearly Hirobo's response to progressively more aggressive flying styles and powerful engines, but I do NOT think it means that flying the Freya hubs with the 3mm screws is unsafe. About a gazzillion gallons of fuel have been flown in this configuration with precious few failures.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-15-2010 05:56 AM  8 years agoPost 10
puneetp

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Bangalore, India

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this thread is year old , any update on this.

Did finally anyone try fitting the D3 clutch on freya ?

a. 0414-440 EX high torque clutch.
b. 0414-475 D3 high torque clutch.

-Puneet

Machine over Gravity

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04-15-2010 06:33 AM  8 years agoPost 11
Dr.Ben

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Richmond, VA, USA

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Puneet,

It'll fit, but you'll need to use the 414-471 mainshaft and possibly play around with rod lengths since that mainshaft is not simply an exact copy of the usual Freya shaft except with 3.5mm lower holes. I know this will work in principle because I have a Freya shaft in my Eagle (had to shorten it a fuzz to keep the third dogbone in place under the third bearing block). Measure the total shaft length above the top bearing block with a stock Freya SUS shaft, then adjust/adapt as needed for the 414-471.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-15-2010 06:42 AM  8 years agoPost 12
puneetp

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Bangalore, India

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Dear ben , thanks for prompt reply.

Few questions ?

a) By 3.5mm lower holes , then I need to use new collars which will house these thicker 3.5mm holes ?

b) Any idea on what is the length difference of D3 main shaft and 0404-707 shaft . Currently we are using 3rd hole (longest) on 707

Machine over Gravity

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04-15-2010 07:00 AM  8 years agoPost 13
puneetp

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Bangalore, India

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Machine over Gravity

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04-15-2010 09:15 AM  8 years agoPost 14
synodontis

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United Kingdom

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a) By 3.5mm lower holes , then I need to use new collars which will house these thicker 3.5mm holes ?
I can confirm that Hirobo changed the brass collar so its thinner to accomodate 3.5mm hex screws. This also means you have to get the new main shaft that has the holes for the 3.5mm screws, this in turn might have a consequence on what head you can use (but I would change heads anyway, since the SSZ-IV is THAT good over the previous howlers we've had).

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04-15-2010 03:48 PM  8 years agoPost 15
NIKOS PAPISTAS

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KOZANI-GREECE

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Hi.

I'll change in my EXII the older SSR-7 with the new SSZ-V and i put and the D3 clutch.The D3 clutch put only in 0414-471 main mast because the 471 have 3.5mm holes (like D3 clutch) and is 1mm shorter.

Hirobo SDX D3 Fbl - ALIGN T-REX 700 F3C V3 FL HEAD-ALIGN T-REX 500 DFC

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04-17-2010 07:04 PM  8 years agoPost 16
puneetp

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Bangalore, India

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thanks folks. For right now I have put my plan of upgrading on hold. Most likely I will be going ahead clutch with Freya and not D3 as we would need to change the shaft and collar

Machine over Gravity

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