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throttle actuator authority

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nimbusaviation(at)YAHOO.C
Guest

Posted: Sun May 15, 2011 3:47 am Post subject: throttle actuator authority

Setting about carb' rebalance (912) we were puzzled to find the setup unable to achieve full throttle arm position at the carb - i.e. we are about the width of a 1 UKP coin short of the full throttle stop  ~3 mm, and in violation of the rotax setup instructions. 



Tracing this geometrical conundrum back it appears that the slot in the throttle 'quadrant' plate in the cockpit is too short by about ~2cm. Has anyone encountered this? The build manual does not indicate dimensions of the throttle lever, so either there is a mal-position of holes in the arm, or the slot was too short to start with, or both. We have not yet opened the throttle lever box. The aircraft has over 400hrs of normal ops, but we worry we might be a tad short of full rated T/O power.



There was a small stop installed at idle (cockpit), however with this removed the problem remains. 

Glenn Rainey

Cumbernauld, Scotland

G-OJHL

classic monowheel

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charleslaverty(at)googlem
Guest

Posted: Sun May 15, 2011 5:12 am Post subject: throttle actuator authority

hi

   I had a similar situation, I found that I had slotted the plate at at 90 

degrees & when pushed forward the lever comes down at a angle on the top 

corner. I removed this with a swiss file plus a little bit & got full 

travel. The idle stop is required to prevent strain on the cable thimble 

attachement on the carbs.

                                                                             

                                  charlie laverty.



--------------------------------------------------

From: "Glenn Rainey" <nimbusaviation(at)YAHOO.COM>

Sent: Sunday, May 15, 2011 12:43 PM

To: <europa-list(at)matronics.com>

Subject: throttle actuator authority



 	  Quote: 	
		   



 Setting about carb' rebalance (912) we were puzzled to find the setup 

 unable to achieve full throttle arm position at the carb - i.e. we are 

 about the width of a 1 UKP coin short of the full throttle stop  ~3 mm, 

 and in violation of the rotax setup instructions.



 Tracing this geometrical conundrum back it appears that the slot in the 

 throttle 'quadrant' plate in the cockpit is too short by about ~2cm. Has 

 anyone encountered this? The build manual does not indicate dimensions of 

 the throttle lever, so either there is a mal-position of holes in the arm, 

 or the slot was too short to start with, or both. We have not yet opened 

 the throttle lever box. The aircraft has over 400hrs of normal ops, but we 

 worry we might be a tad short of full rated T/O power.



 There was a small stop installed at idle (cockpit), however with this 

 removed the problem remains.

 Glenn Rainey

 Cumbernauld, Scotland

 G-OJHL

 classic monowheel

- The Matronics Europa-List Email Forum -

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rlborger(at)mac.com
Guest

Posted: Sun May 15, 2011 5:53 am Post subject: throttle actuator authority

Glenn,



If you have sufficient space between the end of the throttle lever and the face of the instrument panel and all that is preventing full throttle travel it the slot in the top of the throttle quadrant, then get a thin file and gently file the slot forward enough to obtain your full throttle opening.  It shouldn't take much additional movement of the throttle lever to get your 3mm at the carbs.



Be sure you replace your throttle lever idle stop as required by Rotax.



Blue skies & tailwinds,

Bob Borger

Europa Kit #A221 N914XL, XS Tri-Gear, Intercooled 914, Airmaster C/S Prop

http://www.europaowners.org/forums/gallery2.php?g2_itemId=60232

http://www.biplaneforumgallery.com/index.php?cat=10046

Europa Flying!

3705 Lynchburg Dr.

Corinth, TX  76208

Home:  940-497-2123

Cel:  817-992-1117

On May 15, 2011, at 6:43, Glenn Rainey wrote:



 	  Quote: 	
		   

 

 Setting about carb' rebalance (912) we were puzzled to find the setup unable to achieve full throttle arm position at the carb - i.e. we are about the width of a 1 UKP coin short of the full throttle stop  ~3 mm, and in violation of the rotax setup instructions. 

 

 Tracing this geometrical conundrum back it appears that the slot in the throttle 'quadrant' plate in the cockpit is too short by about ~2cm. Has anyone encountered this? The build manual does not indicate dimensions of the throttle lever, so either there is a mal-position of holes in the arm, or the slot was too short to start with, or both. We have not yet opened the throttle lever box. The aircraft has over 400hrs of normal ops, but we worry we might be a tad short of full rated T/O power.

 

 There was a small stop installed at idle (cockpit), however with this removed the problem remains. 

 

 

 Glenn Rainey

 Cumbernauld, Scotland

 G-OJHL

 classic monowheel

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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budyerly(at)msn.com
Guest

Posted: Sun May 15, 2011 3:13 pm Post subject: throttle actuator authority

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Glenn,

 The throttle slot is cut by the builder.  Follow the build manual and  consider following the Rotax manual also.  I build into the 914s a stop for  100% and ensure the forward slot will just bend the throttle cables at full  115%.  For idle, I put a #10 nutplate and a 10-32 flat head screw (a 525  10R-8 to 12 will work also) which is sufficiently long to stop the throttle just  as the carb idle stop is contacted.  Those with vernier style throttles  have a bit of a chore.  You must come up with some method to stop from  bending the idle stop which is a very common rough running and engine failure  problem.

  

 Please consult the manual and pull the throttle box from the cockpit module  and get the throw correct.  At the end of a project, when our attention to  detail should be peaked and our research impeccable, we all make minor  mistakes.  Double check to be sure.  I have never had a problem with  the stock throttle operating flawlessly.

  

 Regards,

  

 Bud Yerly

Europa Tech Support

 Custom Flight Creations, Inc.

www.customflightcreations.com

(813)  653-4989

  

  

 [quote]   ---

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