Composite ARF Kangaroo CG
04-30-2007, 01:57 PM
#1
Composite ARF Kangaroo CG
Hello guys,
Im just finishing my Composite ARF Kangaroo (bought this plane second hand, and it has a fix in the nose section) and with my P-80 the plane was extremely nose heavy, so i moved both batteries (radio and ECU) to the ockets in the back, and this helped a bit, but to balance the plane i had to add about 350g lead in the tail behind the rudder servos.
So, in order to make sure (i know im just paranoid) - the manual calls for the plane to balance 95mm - 100mm forward of the wing joiner tube's front edge, which is about 1-2cm forward of the main landing gear struts.
Just to be on the safe side - is this CG measurement correct ? has anyone found a better point of CG ?
thanks for the help.
Im just finishing my Composite ARF Kangaroo (bought this plane second hand, and it has a fix in the nose section) and with my P-80 the plane was extremely nose heavy, so i moved both batteries (radio and ECU) to the ockets in the back, and this helped a bit, but to balance the plane i had to add about 350g lead in the tail behind the rudder servos.
So, in order to make sure (i know im just paranoid) - the manual calls for the plane to balance 95mm - 100mm forward of the wing joiner tube's front edge, which is about 1-2cm forward of the main landing gear struts.
Just to be on the safe side - is this CG measurement correct ? has anyone found a better point of CG ?
thanks for the help.
04-30-2007, 02:26 PM
#2
RE: Composite ARF Kangaroo CG
ORIGINAL: i3dm
Hello guys,
Im just finishing my Composite ARF Kangaroo (bought this plane second hand, and it has a fix in the nose section) and with my P-80 the plane was extremely nose heavy, so i moved both batteries (radio and ECU) to the ockets in the back, and this helped a bit, but to balance the plane i had to add about 350g lead in the tail behind the rudder servos.
So, in order to make sure (i know im just paranoid) - the manual calls for the plane to balance 95mm - 100mm forward of the wing joiner tube's front edge, which is about 1-2cm forward of the main landing gear struts.
Just to be on the safe side - is this CG measurement correct ? has anyone found a better point of CG ?
thanks for the help.
Hello guys,
Im just finishing my Composite ARF Kangaroo (bought this plane second hand, and it has a fix in the nose section) and with my P-80 the plane was extremely nose heavy, so i moved both batteries (radio and ECU) to the ockets in the back, and this helped a bit, but to balance the plane i had to add about 350g lead in the tail behind the rudder servos.
So, in order to make sure (i know im just paranoid) - the manual calls for the plane to balance 95mm - 100mm forward of the wing joiner tube's front edge, which is about 1-2cm forward of the main landing gear struts.
Just to be on the safe side - is this CG measurement correct ? has anyone found a better point of CG ?
thanks for the help.
just measure with tank empty
and hoppertank full (if any)
these delta,s are forgiving on a not so perfect CG
just dont make it to slow it will back flip and you need some sweat to break out of it :-)
04-30-2007, 04:02 PM
#3
Join Date: Jul 2005
Location: TroonAyrshire, UNITED KINGDOM
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RE: Composite ARF Kangaroo CG
Hi,
I balanced my Kangaroo at the position given in the instructions - which, from memory, is just in front of the joiner tube. In this position it seemed very light on the nose wheel - but it flew fine. Hope this helps.
Colin
I balanced my Kangaroo at the position given in the instructions - which, from memory, is just in front of the joiner tube. In this position it seemed very light on the nose wheel - but it flew fine. Hope this helps.
Colin
05-01-2007, 01:25 AM
#4
RE: Composite ARF Kangaroo CG
100mm is spot on.
Don't release the elevator too quickly on takeoff, you can hold full up in during the TO and slowly release it in the climb out
regards
Dave Wilshere
Don't release the elevator too quickly on takeoff, you can hold full up in during the TO and slowly release it in the climb out
regards
Dave Wilshere
05-01-2007, 10:18 AM
#6
RE: Composite ARF Kangaroo CG
ORIGINAL: i3dm
Thanks guys,
So is it fine that the nose gear is very light, and if i tilt the plane back on the booms, it stays on the booms ?
Thanks guys,
So is it fine that the nose gear is very light, and if i tilt the plane back on the booms, it stays on the booms ?
as soon your turbine runs it will stand strait
dont be afraid full throttle -full elevator.
common mistake: dont let it go to soon after taking off , it could Bounce down again.
05-01-2007, 04:53 PM
#8
Join Date: Nov 2003
Location: Curitiba, Parana, BRAZIL
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RE: Composite ARF Kangaroo CG
ops, sorry to chime in.
no, if the Kangaroo has the standard turbine mount... you can´t overrotate it at take off. But if my memory doesn´t fail me your Roo has a lowered engine mount, so your airplane will rotate easier at takeoff and you will not need to hold full elevator at this moment.. (nor it is recommended)
Enrique
no, if the Kangaroo has the standard turbine mount... you can´t overrotate it at take off. But if my memory doesn´t fail me your Roo has a lowered engine mount, so your airplane will rotate easier at takeoff and you will not need to hold full elevator at this moment.. (nor it is recommended)
Enrique
