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Home✈️Aircraft🚁HelicopterSynergy R/CSynergy N9 › So who IS still keeping their N9???
03-29-2010 05:51 PM  10 years ago
Yanga

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Edinburgh, Scotland

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Hi Paul,

I think you got your post in as I was writing mine.

Out of curiosity can I ask what gyro, servo and tail blades are you using?

Cy.
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03-29-2010 06:00 PM  10 years ago
thenewguy

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Corvallis, Oregon Where there is liquid sunshine!

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pwood,

It sounds like you know where the issues are. I understand the cost of the crown and tail gears is a pain. If I had gone through that many I would not be happy ether. Your on the right track and that is what's important.

Chris
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03-29-2010 06:16 PM  10 years ago
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

I have the original SAB tail blades and Futaba 9256 servo in the machine.

I started with a Futaba 611, then Spartan 760, then Spartan Quark and now V Bar FBL.

The Quark broke the most. The stops are quite soft, I just had the gain too high. It didn't give the usual 'wag'.

I don't blame the gyros at all. I have given other helis much more abuse and nothing broke. Except hitting the tail on auto practice with my old XCell Tempest FAI.

Regards
Paul
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03-29-2010 06:53 PM  10 years ago
Yanga

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Edinburgh, Scotland

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Cool, you strike me as an experienced dude and know what you are talking about through that experience.

I only used the stock tail blades for one day myself before I killed them in a crash (aforementioned hurricane dart action) but I have heard some say that they are a bit extreme for modern gyros on the powerful tail system of the N9 due to their wide chord. I have even heard some say that 95's work better than 105's in that respect. Personally I like the Radix 105 and Spartan 760 combo.

Regarding cost I agree strongly that these parts are stupid expenso!

Later dudes...
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03-29-2010 06:56 PM  10 years ago
thenewguy

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Corvallis, Oregon Where there is liquid sunshine!

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Yanga,

You are correct about the tail blades being to much. I believe Matt and Todd recommend using 95's not 105's. I still run the 105, I do not do a lot of hard reverse piro's though.

pwood, You might drop Matt Botos a e-mail and ask him his recommendations on tail blade length.

Chris
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03-29-2010 09:55 PM  10 years ago
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

I have a set of radix 95 and Edge 105's in my 'parts bin' maybe i should just install them.

I was waiting for them to break. 2,5 years later and lots of gears...... and the tail blades are still perfect....

Thanks guys

Regards
Paul
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03-30-2010 09:39 AM  10 years ago
Yanga

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Edinburgh, Scotland

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For whatever help my simple banter with terrible grammar and punctuation may offer you are assuredly welcome. I like to talk helis to help and to learn, especially about this heli, I am a total fanatic about the N9... probably even obsessive maybe.

Best regar'ds and thanks to yas all.

Cymon
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03-30-2010 04:06 PM  10 years ago
cdrking

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Seattle

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Paul,

Yes ditch the 105's and run the 95 mm tail blades. With 105's on the N9 it makes for a very large tail disk. This can be very hard on the gears.

IMO if you are stripping crown gears in flight then something is not right. That is unless you are a very hard tail reversal type of flyer. If you're not doing a lot of hard reversals then you should be able to keep the crown and tail gears.

Here's my Spartan settings if that will help. Are you using the software to program the Spartan?

To hover is divine, the alternative is rather PLANE.
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03-30-2010 05:02 PM  10 years ago
Entityofme1

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Birmingham, AL.

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You have to set the mesh fairly tight on this bird at first for the crown gear. You want it to be notchy or ratchety feeling to a degree where it has some resistance when turning the main disk with blades. It should be somewhere in the middle as to not moving with complete ease but also not requiring a great amount of effort to turn the blades by hand either. It takes some time to know what is too loose and what is too tight, however I feel that you could error with a bit more tightness than necessary and be fine in favor of it having too much freeplay which will more than likely strip a tooth and destroy the crown gear everytime. I would recommend always at least putting one shim under the crown gear hub as I have never seen a mesh that was too tight without a single shim underneath. It could require as many as three shims under the head which I have used at one point but commonly it will be 1-2 shims. You can also press down or pull up on the tail boom blocks while tightening the bolts ( kind of tricky but can be done) and this will allow for some minor adjustment as well. It's been said before but if you start to see the little shavings of gear around its outer edge after a few flights this is common as the gear is wearing in. Alot of guys when first getting into their N9 will be amazed at how fast and crisp the tail response is with starts and stops (especially using 105 mm tail blades) and will keep these settings because they can be fun in all honesty. But these kind of speeds just arent practical for most types of flying unless it's just for showing people how fast the tail can get. Alot of us could probably benefit from slowing the tail down anyway and I'm speaking for myself as well.
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03-30-2010 05:40 PM  10 years ago
cdrking

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Seattle

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^^+1

I set my crown gear mesh too tight last summer and it was chirping. That's first time I experienced it being too tight. I agree run it tight.

Jeff
To hover is divine, the alternative is rather PLANE.
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03-31-2010 12:17 AM  10 years ago
whyfly

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Temecula C.A.

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I have 3 N9 never had issue's with the tail gear.One of the N9 has the metal gear set which I love and 2 of the N9 has stock gear set also gyro are 611 and one with the spartan, today I put gallon on one N9 trying to lock in piro flips/chaos and yes I'm keeping 3 N9.
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03-31-2010 07:55 AM  10 years ago
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

You guys have got me thinking.....

95mm Radix has been installed. Will go fly this afternoon.

What i find strange, is the Synergy has always been reported as having a powerful tail..... but it is 80mm from bolt hole to bolt hole. My Turbulence / SDX is 88mm.

Will report back

Regard
Paul
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03-31-2010 05:00 PM  10 years ago
cdrking

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Seattle

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My Turbulence / SDX is 88mm.
But isn't the Turbulence belt drive with no crown gear?

Jeff
To hover is divine, the alternative is rather PLANE.
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03-31-2010 06:12 PM  10 years ago
spdntckt

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San Jose, CA USA

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its not just the diameter of the disc but also the RPM. what is the tail drive ratio on the turbulence?
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03-31-2010 06:16 PM  10 years ago
Paul Woodcock

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Dubai - United Arab Emirates

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Hi Guys

Yes, the Turbulence is belt driven with no crown gear. The drive method shouldn't affect the 'power' of the tail.

I test flew with Radix 95's. I only had 2 flights. The first was with the VBar gain set as it was for the SAB 105's. It was too low. The second flight, i upped the gain from 70 to 80 and things were much better. These blades are clearly not as aggressive as the SAB 105's.

Thanks guys. I should have done this a long time ago.

Regards
Paul
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04-10-2010 11:54 AM  10 years ago
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

Just found some metal tail gears at Experience RC..... N9 will stay!!!!!

Regards
Paul
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Home✈️Aircraft🚁HelicopterSynergy R/CSynergy N9 › So who IS still keeping their N9???
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