NOSE OR TAIL HEAVY
09-27-2005, 06:07 AM
#1
NOSE OR TAIL HEAVY
I MOUNTED A GAS ENGINE in a arf super stick , the plane fly's but ,when in flight it seems to have a tail sag,however I have to give it slight UP at times in fligh when its in a slower flying mode.I dont know what to do take some lead out of the tail or add some,What do you suggest?
09-27-2005, 06:48 AM
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RE: NOSE OR TAIL HEAVY
Could be nose heavy and the amount of up elev deflection/trim you are using is kinda plowing the wing through the air.. Does it slow down to land nicely? If not then you are definitely nose heavy.. However if it is very sensitive on the elevator than you are tail heavy.. It should balance around 1/3 the way back from the LE looking at the pic..
09-27-2005, 07:08 AM
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RE: NOSE OR TAIL HEAVY
IT sounds like it is nose heave with a little too much up thrust
As power is applied, you have to add down to keep it going straight but when you slow down, you have to add up because of the nose heavy condition.
As power is applied, you have to add down to keep it going straight but when you slow down, you have to add up because of the nose heavy condition.
ORIGINAL: suzonka
I MOUNTED A GAS ENGINE in a arf super stick , the plane fly's but ,when in flight it seems to have a tail sag,however I have to give it slight UP at times in fligh when its in a slower flying mode.I dont know what to do take some lead out of the tail or add some,What do you suggest?
I MOUNTED A GAS ENGINE in a arf super stick , the plane fly's but ,when in flight it seems to have a tail sag,however I have to give it slight UP at times in fligh when its in a slower flying mode.I dont know what to do take some lead out of the tail or add some,What do you suggest?
09-27-2005, 06:18 PM
#5
RE: NOSE OR TAIL HEAVY
ORIGINAL: scottfl78
Could be nose heavy and the amount of up elev deflection/trim you are using is kinda plowing the wing through the air.. Does it slow down to land nicely? If not then you are definitely nose heavy.. However if it is very sensitive on the elevator than you are tail heavy.. It should balance around 1/3 the way back from the LE looking at the pic..
Could be nose heavy and the amount of up elev deflection/trim you are using is kinda plowing the wing through the air.. Does it slow down to land nicely? If not then you are definitely nose heavy.. However if it is very sensitive on the elevator than you are tail heavy.. It should balance around 1/3 the way back from the LE looking at the pic..
09-27-2005, 06:23 PM
#6
RE: NOSE OR TAIL HEAVY
ORIGINAL: bubbagates
Did you actually balance the plane before flight and when the fuel tank was empty?
Did you actually balance the plane before flight and when the fuel tank was empty?
09-27-2005, 06:42 PM
#7
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RE: NOSE OR TAIL HEAVY
If I understand what you are saying.
Try flying at medium/normal speed then cut the throttle if it balloons (climbs), you either have a tail heavy condition (stab can't compensate) or you have to much down thrust. I would also check my incidences.
There might be a combination of both.
Try flying at medium/normal speed then cut the throttle if it balloons (climbs), you either have a tail heavy condition (stab can't compensate) or you have to much down thrust. I would also check my incidences.
There might be a combination of both.
09-27-2005, 07:15 PM
#8
RE: NOSE OR TAIL HEAVY
ORIGINAL: RTK
If I understand what you are saying.
Try flying at medium/normal speed then cut the throttle if it balloons
(climbs), you either have a tail heavy condition (stab can't compensate) or you have to much down thrust. I would also check my incidences.
There might be a combination of both.
If I understand what you are saying.
Try flying at medium/normal speed then cut the throttle if it balloons
(climbs), you either have a tail heavy condition (stab can't compensate) or you have to much down thrust. I would also check my incidences.
There might be a combination of both.
09-27-2005, 07:42 PM
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RE: NOSE OR TAIL HEAVY
I had a 60size hanger 9 super stick and it flew with the tail low, looked funny but liked to fly that way. I have seen some other sticks fly with a low tail also.
09-27-2005, 08:00 PM
#10
RE: NOSE OR TAIL HEAVY
ORIGINAL: babflyer
I had a 60size hanger 9 super stick and it flew with the tail low, looked funny but liked to fly that way. I have seen some other sticks fly with a low tail also.
I had a 60size hanger 9 super stick and it flew with the tail low, looked funny but liked to fly that way. I have seen some other sticks fly with a low tail also.
09-27-2005, 11:17 PM
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RE: NOSE OR TAIL HEAVY
All 3 of my sticks from 40 size to Giant flew/fly with a slightly tail down atitude.
I have had a fair share of balooning planes on landing and it has always been a slight tail heavy condition causing it.
How does it fly inverted.
I have had a fair share of balooning planes on landing and it has always been a slight tail heavy condition causing it.
How does it fly inverted.
09-28-2005, 01:42 AM
#12
RE: NOSE OR TAIL HEAVY
ORIGINAL: andyt
All 3 of my sticks from 40 size to Giant flew/fly with a slightly tail down atitude.
I have had a fair share of balooning planes on landing and it has always been a slight tail heavy condition causing it.
How does it fly inverted.
All 3 of my sticks from 40 size to Giant flew/fly with a slightly tail down atitude.
I have had a fair share of balooning planes on landing and it has always been a slight tail heavy condition causing it.
How does it fly inverted.
09-28-2005, 06:43 AM
#13
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RE: NOSE OR TAIL HEAVY
The appearance of the fuselage in flight ("tail down attitude") is not a result of the CG location. It is the result of the wing incidence. The wing is going to fly at the angle of attack necessary to obtain the required lift. The fuselage angle in the air then is the combination of that angle of attack and the wing incidence.
Bedford
Bedford
09-28-2005, 07:47 PM
#14
RE: NOSE OR TAIL HEAVY
ORIGINAL: beepee
The appearance of the fuselage in flight ("tail down attitude") is not a result of the CG location. It is the result of the wing incidence. The wing is going to fly at the angle of attack necessary to obtain the required lift. The fuselage angle in the air then is the combination of that angle of attack and the wing incidence.
Bedford
The appearance of the fuselage in flight ("tail down attitude") is not a result of the CG location. It is the result of the wing incidence. The wing is going to fly at the angle of attack necessary to obtain the required lift. The fuselage angle in the air then is the combination of that angle of attack and the wing incidence.
Bedford
09-29-2005, 12:04 PM
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RE: NOSE OR TAIL HEAVY
Methinks beepee is onto something. If the incidence is set wrong, it can definately cause the tail to sag as you describe. It would seem in this condition that the sagging angle of the horizontal stab at the tail is causing an in flight reaction much like down elevator input. This could explain why you must keep giving it up elevator at times, even though the tail is still drooping.ZZ.
09-29-2005, 12:17 PM
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RE: NOSE OR TAIL HEAVY
Yes, But I do not think that would cause a ballooning affect on landing.
ORIGINAL: suzonka
It slows down nice for a landing but blooms up a bit, I have a hard time keeping it down,
It slows down nice for a landing but blooms up a bit, I have a hard time keeping it down,
09-29-2005, 06:01 PM
#18
RE: NOSE OR TAIL HEAVY
ORIGINAL: taildragger21
Is That a 25-50cc gasser on the nose of that 40 size stick??!![X(] Thats a red flag to me
Is That a 25-50cc gasser on the nose of that 40 size stick??!![X(] Thats a red flag to me
09-29-2005, 09:41 PM
#20
RE: NOSE OR TAIL HEAVY
Did you move everything you could towards the tail... ??? With all that weight up front I would hate to have dead weight.. You need to keep the wing loading down with that much weight.. Did you reinforce the firewall?? Strong servos?? beef the tail section and wing joint?? Sorry, I'm not trying to tick you off , but with that small a model, and that nuch motor/weight on the nose, many things can go wrong and can be dangerous.. Plus lots of wieght make's the plane fly horrible.. I know you think it doesn't fly that bad, but if you built another wityh a satio 100 or equivalent glow engine you would see and feel how much better the plane would fly, and I would almost say have almost as much power.. Plus Lighter wing loading! Sorry to critique, but I am just trying to give advice..
09-29-2005, 11:19 PM
#23
RE: NOSE OR TAIL HEAVY
ORIGINAL: taildragger21
Did you move everything you could towards the tail... ??? With all that weight up front I would hate to have dead weight.. You need to keep the wing loading down with that much weight.. Did you reinforce the firewall?? Strong servos?? beef the tail section and wing joint?? Sorry, I'm not trying to tick you off , but with that small a model, and that nuch motor/weight on the nose, many things can go wrong and can be dangerous.. Plus lots of wieght make's the plane fly horrible.. I know you think it doesn't fly that bad, but if you built another wityh a satio 100 or equivalent glow engine you would see and feel how much better the plane would fly, and I would almost say have almost as much power.. Plus Lighter wing loading! Sorry to critique, but I am just trying to give advice..
Did you move everything you could towards the tail... ??? With all that weight up front I would hate to have dead weight.. You need to keep the wing loading down with that much weight.. Did you reinforce the firewall?? Strong servos?? beef the tail section and wing joint?? Sorry, I'm not trying to tick you off , but with that small a model, and that nuch motor/weight on the nose, many things can go wrong and can be dangerous.. Plus lots of wieght make's the plane fly horrible.. I know you think it doesn't fly that bad, but if you built another wityh a satio 100 or equivalent glow engine you would see and feel how much better the plane would fly, and I would almost say have almost as much power.. Plus Lighter wing loading! Sorry to critique, but I am just trying to give advice..
