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search-n-destroy
Extreme 3D
Extreme 3D


Joined: 27 Sep 2016
Posts: 570
Location: winnipeg

PostPosted: Mon Jan 09, 2017 2:58 am
PostPost subject: Creme de la Creme Co Axial
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http://www.tech-sov.com/products_detail_101.htm
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Burgess
Extreme 3D
Extreme 3D


Joined: 27 Mar 2012
Posts: 1085
Location: Wales

PostPosted: Mon Jan 09, 2017 7:30 am
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Sovereign Engineering might just have brought their line of coax models helicopters to marker at the right time.
Walkera had intended to market a 400 or 450 size Sikorsky X2 with dual swashplates. I look forward to seeing how Sovereign Engineering design their version of the Sikorsky X2.

Here's the link for a pdf review on the CTX-5FBL, I like the idea of bevelled gear driven main gears, however, it will be interesting to see how well they function. The tri-blade rotors have flap fulcrum hinge-point similar to 5-blade floating heads (o happy days setting up the tracking) Wink

http://www.tech-sov.com/upload/files/CTX-5FBL_MHWMAR15.pdf


Burgess
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search-n-destroy
Extreme 3D
Extreme 3D


Joined: 27 Sep 2016
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Location: winnipeg

PostPosted: Mon Jan 09, 2017 8:50 am
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Laughing Ha ha @ blade tracking comment. The batteries are also $120 usd each and if they stop making spare parts it becomes an expensive static model.
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Burgess
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PostPosted: Mon Jan 09, 2017 12:38 pm
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The engineering looks ok in the PFD article. Battery packs can be added together or constructed from single cells. The supply of clone T-rex parts have drastically reduced. Push comes to shove could always convert to an IC engine.



Burgess
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search-n-destroy
Extreme 3D
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Joined: 27 Sep 2016
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PostPosted: Tue Jan 10, 2017 12:05 am
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Beautiful parts yes. Also like the look of the rotors not being a mile apart. Kevin.

Last edited by search-n-destroy on Tue Jan 10, 2017 7:46 am; edited 1 time in total
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Burgess
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PostPosted: Tue Jan 10, 2017 3:08 am
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That photo's of the earlier CTX-5 with the two-blade flybared rotor heads, which may have quite generous teeter moment movement on both rotors, plus flexing of the plastic rotor blades, so increased the spacing between rotor heads would be a safety measure. I failing to find any photos of extremely wide spaced rotor heads.


Burgess
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tombo242
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Joined: 04 Nov 2008
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Location: Santo Estêvão, East Algarve, Portugal. Now 82, but still feels 22.

PostPosted: Tue Jan 10, 2017 6:05 pm
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The usual cause of co-axial rotors clashing is over controlling by the flyer. I found that when I reduced the servo action as below it was not possible to cause a blade clash.

D/R&EXPO
Pos '0' AILE 85% - 20%; ELEV 85% - 20%; RUDD 100% INH
Pos '1' AILE 85% + 10%; ELEV 85% + 10%; RUDD 100% INH

TRAVEL ADJUST
THRO 100%; ELEV 80% (up&down); GYRO 100%;
AILE 80% (both ways); RUDD 100% (both ways); PITCH 100% (both ways)

SUB TRIM = ZERO All

Of course this was the DX6i conversion settings not the stock Tx.

Tom.
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search-n-destroy
Extreme 3D
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Joined: 27 Sep 2016
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Location: winnipeg

PostPosted: Tue Jan 10, 2017 8:47 pm
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Burgess wrote:
That photo's of the earlier CTX-5 with the two-blade flybared rotor heads, which may have quite generous teeter moment movement on both rotors, plus flexing of the plastic rotor blades, so increased the spacing between rotor heads would be a safety measure. I failing to find any photos of extremely wide spaced rotor heads.


Burgess
Hi Burgess, I was actually referring to big lama owners who install those long extended shafts. I removed the comment and picture because it was off topic. Sorry. Embarassed Kevin
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search-n-destroy
Extreme 3D
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Joined: 27 Sep 2016
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PostPosted: Tue Jan 10, 2017 8:55 pm
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tombo242 wrote:
The usual cause of co-axial rotors clashing is over controlling by the flyer. I found that when I reduced the servo action as below it was not possible to cause a blade clash.

D/R&EXPO
Pos '0' AILE 85% - 20%; ELEV 85% - 20%; RUDD 100% INH
Pos '1' AILE 85% + 10%; ELEV 85% + 10%; RUDD 100% INH

TRAVEL ADJUST
THRO 100%; ELEV 80% (up&down); GYRO 100%;
AILE 80% (both ways); RUDD 100% (both ways); PITCH 100% (both ways)

SUB TRIM = ZERO All

Of course this was the DX6i conversion settings not the stock Tx.

Tom.
Your right Tom. Smooth flying is the best way to prevent blade strikes. I have never had a blade strike using 100% stock Big Lama & Tx. Kevin
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