RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

SM BAE Hawk question for you owners/operators

Reply
Old 11-10-2012, 05:14 AM
  #1
Joe Westrich
Thread Starter
 
Joe Westrich's Avatar
 
Join Date: Aug 2002
Location: Mason, OH
Posts: 954
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default SM BAE Hawk question for you owners/operators

How much do you pressurize the main gear. I have mine set so that the main gear is partly compressed when sitting idle.

On take off, it body rolls a little when correcting with rudder on takeoff. Also, it seems to rotate easier when the gear is extended vs. compressed. I guess what I'm getting at is , should I up the pressure in the main gear so it doesn't sit partly compresses or leave it alone?
Joe Westrich is offline  
Reply With Quote
Old 11-10-2012, 06:19 AM
  #2
ddennison
 
Join Date: May 2003
Location: rochester, MN
Posts: 2,381
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: SM BAE Hawk question for you owners/operators

looking forward to the answer, I am awaiting my Goshawk!

Dave
ddennison is offline  
Reply With Quote
Old 11-10-2012, 07:10 AM
  #3
dubd
 
dubd's Avatar
 
Join Date: Aug 2007
Location: Bay Area, CA
Posts: 4,269
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: SM BAE Hawk question for you owners/operators

I like mine to have as much air pressure as possible. I pump 120 psi into the struts.
dubd is offline  
Reply With Quote
Old 11-10-2012, 09:33 AM
  #4
DelGatoGrande
 
DelGatoGrande's Avatar
 
Join Date: Mar 2004
Location: ATHENS, , GREECE
Posts: 2,843
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: SM BAE Hawk question for you owners/operators

110psi to mind(as much as i can get from my air compresor anyway)
It also deepens on how much oil you put in the main struts.
I prefer it on the stiff side so it will be more "solid" during take off control as you describe.
Rotating has to do with how close the wheel axles are to the CG
The stiffness of your mains will actually change your wing incidence.Try to set your strut stiffness so your wing is level with tanks full of fuel.
But on landing when you will touch down empty expect slightly negative incidence meaning that the model will not bounce but stick on the runway.


hope this makes sense ..
sorry for the poor english
DelGatoGrande is online now  
Reply With Quote
Old 11-10-2012, 09:58 AM
  #5
Joe Westrich
Thread Starter
 
Joe Westrich's Avatar
 
Join Date: Aug 2002
Location: Mason, OH
Posts: 954
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: SM BAE Hawk question for you owners/operators

I know when the struts are fully extended it moves the main wheels forward a bit. When my canopy/cockpit is out of the airplane and there is no fuel in the tanks, the airplane sits on its tail (struts fully extended). If I compress the struts partially, it will sit on its wheels.

It may give the wing a slight negative incidence with extended struts but the wheels foward position makes it rotate easier.

I think I will pump up my struts. I think I only have 80 or 90 psi in mine.

I need a good system that will help me put air in the struts.
Joe Westrich is offline  
Reply With Quote
Old 11-10-2012, 11:09 AM
  #6
dubd
 
dubd's Avatar
 
Join Date: Aug 2007
Location: Bay Area, CA
Posts: 4,269
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: SM BAE Hawk question for you owners/operators

The problem I have with mine is it won't maintain air. Not sure where its leaking air.
dubd is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 06:30 AM.