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Home✈️Aircraft🚁HelicopterHIROBOHirobo Freya › Evo 90 upgrade question
04-03-2012 03:37 AM  9 years ago
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B.T.D.T.

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NY

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Evo 90 upgrade question
Just picked up some bling for my Evo 90 plastic frame.

Hirobo 0404-716. WC engine mount.
It seems this is about 1/8 " too small to fit the frame. Is this the wrong piece or do I need washers?

Also I got a used shinny blue fan hub with the clutch shaft. My old fan hub used the compression collar. This blue fan hub used the key way. Is this better than the compression one?

Also the used clutch shaft is shorter than my old one by 1/4". I will use the old clutch.

Did I get the wrong pieces or the other version of the freya Evo 90 different?

Thanks
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04-03-2012 04:16 AM  9 years ago
B.T.D.T.

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NY

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Is this the washer I need to take up the gap?
2506-014.
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04-03-2012 06:30 AM  9 years ago
F3CWNB

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Napier, New Zealand

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Using a floating washer to "take up the gap" is never the right answer from a structual point of view - but hey, it works.

I would stick with the original fan hub with the tapper collet - much better than the blue one IMO.

Colin
'Life' is Looking Up!!!
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04-03-2012 06:28 PM  9 years ago
Agilefalcon

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Fort Worth, Texas

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The Freya Evo clutch shaft is longer because it goes through an additional bearing, when compared to the original Freya.

I use the WC engine mount myself, I don't recall it being too small. I do use the hardened washers on the outside of the frame to allow tightening of all the bolts.

I've used both the keyed and collar engine fan hubs. I haven't had a problem with either one, though on the Freya I've not bothered to change it from the kit provided hub.

Really, the only upgrade I truly like is the metal yoke. You can then run very hard dampers (or a machined Delrin part that gives minimal movement).

The Freya is pretty solid out of the box and you don't really need to do anything but tune it: Flybar length, paddle shape/size/weight, flybar weight, Bell/Hiller mixing etc.
Chris Berardi
Team BobbyJack's Hobbies
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04-03-2012 09:04 PM  9 years ago
2kwik2c

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Chino Hills, USA

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As for your question in regards to the WC engine mount here's my past experience with it.

If I use the WC mount on a carbon fiber lower frame, this mounts easily with out any use of the washers. But if you're going to use the WC mount of a plastic lower frame such as what you have in the EVO 90, then there is a gap between the mount and the frame. You need to get washers to close those gaps.

The best person to confirm and/or answer this question would be Dr. Ben. He's got a plethora of knowledgeable information on these kits. So far he's the one that have been helping me from the beginning ever since I went towards the Hirobo brand.
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04-03-2012 09:49 PM  9 years ago
B.T.D.T.

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NY

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I kinda figure that mount was made for a different frame since it didn't fit mine. I know I can use flat washers to take up the space, it's just a shame I didn't know before hand it. Now it's going to have a small gap on each side filled with a washer. Now I got to find a black or blue washer.
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04-03-2012 11:00 PM  9 years ago
Hoggy42

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Australia

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If you download the Freya D3op.pdf from 0414-943 FREYA Evolution OP SWM SSZ-‡X

http://model.hirobo.co.jp/parts/

It shows a small picture on page 29 about using the option WC mount. Looks like the stepped washers go on the inside of the frame and the hardened flat washers on the outside of the frame.

Hope this helps I have one that I've not got round to fitting yet took me a while to find this for myself I've downloaded most of the manuals now.
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04-03-2012 11:24 PM  9 years ago
Tag1260

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Ohio USA

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Now I got to find a black or blue washer.
Have you ever used any gun bluing? I happened on a bottle for something else and now I use it on everything. Really makes a difference when you want to hide something. You can get it at wally World in the sporting goods dept.
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04-04-2012 01:23 AM  9 years ago
B.T.D.T.

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NY

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Thanks Hoggy42,

That is what I wanted to see. Flip the other washer to the inside and install flat washers on the outside.

I did try that the other day quicky and it was too large. I guess I will have to give it a real try this time.

Thanks again to all.
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04-04-2012 04:20 AM  9 years ago
Dr.Ben

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Richmond, VA, USA

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The stepped washers do indeed go on the inside.

Keep a list for me of the colorful words you use as you try to keep all six of those washers in the slot while you slide the mount into place. It all works well once it's up in the frames. As noted, use hardened washers on the outside to effectively cap the stepped washers.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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04-04-2012 07:41 AM  9 years ago
brandon113

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bedford, texas

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I use rubber cement or something sticky to hold the washers in while I install the moter. In my old plastic Freya frame you can't install the top inside washers untill the fan is past them. It is a real pain....

Brandon
2 Freya Xspec, 1 Freya, Eagle2, Tsurugi, SDX
Hirobo nut.....
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04-04-2012 11:41 AM  9 years ago
B.T.D.T.

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NY

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Thanks for the heads up and I will keep my pen and paper ready. I just finished balancing the fan. I hope to install it tonight.
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05-06-2012 02:26 PM  9 years ago
B.T.D.T.

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NY

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Just an update. I finally got around to installing the engine and mount last night. Good thing I got backup helis.

I was thinking got to keep a list of words for Ben.

Events and List of words

Slide the engine in without any problem.
"Oops" forgot to install the inner washers

I was holding the heli sideways on the skid rods, thinking this is not that bad with the inside washers installed and about to slide the engine in. And thinking in my head of that list I need to save for Ben. I was thinking more on that list than the actual work on hand. LOL I guess I did not hold it tight or was thinking of that list for Ben and it swing around inverted and "O God".

"BEN!!!!!" Got me thinking about that stupid list.

Laid the heli on the side this time on the table and slowly slide it in.

The fan was hitting the washers and would not go in, removed the 2 washers and was able to slide it half way and then reinstall the 2 washers. Thinking this is not that bad what was Ben thinking. Drop the washer in the heli. "That Ben" Got to stop thinking about that stupid list.

Could not find that washer. "Ahh" it was stuck between the tank and frame.

Installed washers and about to slide engine in. Tight fit so I removed one mounting point on the landing skid. Slowly slide the engine in and used a thin screw driver to help align the washer and mount. It slide right in.

Started installing the screws with the harden flat washers and when I finished one side I got real pissed. "F*&#" There was only 5 washers in a pack. Then realized didn't matter because under that screw was the large thick mounting plate for the remote glow.

Thanks
Gene
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05-07-2012 02:59 AM  9 years ago
Dr.Ben

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Richmond, VA, USA

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Ben
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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05-07-2012 04:16 AM  9 years ago
Hoggy42

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Australia

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Just a tip for you I found out the hard way yesterday. Make sure to connect your earth for the glow to a bolt on the engine. As the nice bling blue engine mount wont conduct electricity.

BTW I put mine in last week didn't find it too bad to install.
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05-07-2012 11:34 AM  9 years ago
B.T.D.T.

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NY

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Thanks for that heads up.
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