Help! Aileron pushrod not in straight line alignment with servo control-arm linkage-stopper!

[Houndpup Rc]

Thanks for the detailed tip Merv. The following were the checkup i carried out.

1. i did calibrated the esc.
2. i did ensure the elevator was working properly as part of pre-flight checkup.
3. The nose was rather heavy, and i thought it would help in stable flight, but could that be an potential issue?Should the plane be always a little touch nose heavy instead of very heavy?

Yeah, it should always be on the nose heavy side...If it's too tail heavy then it will feel squirrelly and unstable.

 

[AIRFORGE]

Yeah, it should always be on the tail heavy side...If it's too tail heavy then it will feel squirrelly and unstable.

Wha..?

 

[Houndpup Rc]

Wha..?

Thanks!...Fixed.
You could fix it for me too! LOL

 

[AIRFORGE]

Thanks!...Fixed.
You could fix it for me too! LOL

Homie don't play dat!

 

[Karthik1130]

Hello all,today i took the plane again for a second try and this time it was a success, and for that i did the following modifications as given below:

1. 5045 dual-blade pointed tip replaced with 5045 tri-blade bullnose.
2. CG slightly adjusted to be tail heavy by pushing the receiver back, but still maintained a bit of touch nose-heavy.

The following were the observations:

1. After hand-launch, It required a lot of distance to be covered by the plane, before any elevator input takes effect on increasing its altitude.
2. The plane required constant elevator input to keep it in level flight in its cruising speed, or else the nose drops down immediately, and it was a constant stress for me to give elevator input throughout the flight.
3. The plane required almost 75-80% throttle to maintain a safe and cruising altitude.
4. Only at full throttle from handlaunch, the plane could maintain its altitude, without any issues.

I felt it required CG to be further slightly moved back to eliminate the constant elevator input in order to maintain a level altitude flight.
Do you guys still think 5045 pointed-tip dual-blade propeller will work?
Whats your opinion on all of the above point guys?

 

[Piotrsko]

Well back in the day........ we called your plane a pig. Full throttle to just fly says it's draggy or has some sort of alignment issue from the all the flight surfaces. Should be climbing on less than 3/4 throttle. Can you run a 6" prop for more thrust? Needs a couple turns of up added to the elevator linkage so it is visibly pointed up, unless it flies really well inverted ( which is the alignment issue rearing its ugly head). Is there any down thrust? Too nose heavy could mimic a misalignment issue but if it flies better with the more aft CG, by all means keep the cg where it is now if it doesn't get twitchy. Finally, it should be set up and trimmed to fly hands off for a moment or two on it's own. My combat stuff has to be flown all the time, but for 3 minutes every so often, I can deal with that

 

[Karthik1130]

Well back in the day........ we called your plane a pig. Full throttle to just fly says it's draggy or has some sort of alignment issue from the all the flight surfaces. Should be climbing on less than 3/4 throttle. Can you run a 6" prop for more thrust? Needs a couple turns of up added to the elevator linkage so it is visibly pointed up, unless it flies really well inverted ( which is the alignment issue rearing its ugly head). Is there any down thrust? Too nose heavy could mimic a misalignment issue but if it flies better with the more aft CG, by all means keep the cg where it is now if it doesn't get twitchy. Finally, it should be set up and trimmed to fly hands off for a moment or two on it's own. My combat stuff has to be flown all the time, but for 3 minutes every so often, I can deal with that

The following are my queries:

1. Can this motor withstand the demands placed by 6045 dual-blade pointed-tip propeller?
2. Can Simonk 30A ESC run this motor with 6045 dual-blade pointed-tip propeller, even under full throttle without any stuttering of motor safely?

 

[bisco]

Is the cog correct with flite test spec?

 

[Foamforce]

The following are my queries:

1. Can this motor withstand the demands placed by 6045 dual-blade pointed-tip propeller?
2. Can Simonk 30A ESC run this motor with 6045 dual-blade pointed-tip propeller, even under full throttle without any stuttering of motor safely?

The thrust chart you posted on the first page appears to show this motor pulling 12a with a 6042 prop. The max amps on this motor is apparently 30a, so the 6045 seems like it should be fine. Just try it briefly and see if either the motor or ESC gets very hot. You should be able to hold your finger on the base of the motor without being uncomfortable.

 

[Merv]

...The nose was rather heavy, and i thought it would help in stable flight, but could that be an potential issue?Should the plane be always a little touch nose heavy instead of very heavy?

Yes, the plane can be too nose heavy, slightly nose heavy is OK, just don’t over do it.

...The plane required constant elevator input to keep it in level flight in its cruising speed, or else the nose drops down immediately,...

You need to trim the plane to fly level. Almost every plane I have built has required some amount of trim to fly straight and level.

Regarding a larger prop, proceed with caution. I always test an new setup as follows.
Run the motor at full speed for 10 seconds or so. Then stop, take the temperature of everything, the motor, ESC & battery, by touching them. Warm is OK but if anything is so hot you don't want to hold it, then STOP. That's too hot, try a smaller prop. If it passes, try a 30 second run and take the temperatures. If it passes, try a 60 second run and take the temperatures. If it passes, go for a fly.

It's always a good practice to take the temperatures after a fly. Keep in mind that a setup that worked when it is mild, 70'sF, may overheat when it is hot outside 95F+.

 

[bisco]

consider adjusting the servo arm so that you can apply more upelevator and less down elevator.

 

[Karthik1130]

Is the cog correct with flite test spec?

yes, definitely cog is correct with the flitetest spec

 

[Karthik1130]

The thrust chart you posted on the first page appears to show this motor pulling 12a with a 6042 prop. The max amps on this motor is apparently 30a, so the 6045 seems like it should be fine. Just try it briefly and see if either the motor or ESC gets very hot. You should be able to hold your finger on the base of the motor without being uncomfortable.

sure,will post the updates here.

 

[Karthik1130]

Yes, the plane can be too nose heavy, slightly nose heavy is OK, just don’t over do it.

You need to trim the plane to fly level. Almost every plane I have built has required some amount of trim to fly straight and level.

Regarding a larger prop, proceed with caution. I always test an new setup as follows.
Run the motor at full speed for 10 seconds or so. Then stop, take the temperature of everything, the motor, ESC & battery, by touching them. Warm is OK but if anything is so hot you don't want to hold it, then STOP. That's too hot, try a smaller prop. If it passes, try a 30 second run and take the temperatures. If it passes, try a 60 second run and take the temperatures. If it passes, go for a fly.

It's always a good practice to take the temperatures after a fly. Keep in mind that a setup that worked when it is mild, 70'sF, may overheat when it is hot outside 95F+.

Is it safe to conduct this propeller test by holding the powerpod by one hand and using the servotester on the other hand to increase the throttle? because i dont have test fixture.

 

[Karthik1130]

Hello all, today took another flight of this plane and I observed a strange thing:
1) During hand-launching the motor stutters by giving some sound when i push for full throttle suddenly, and then it restarts again this cycle repeats, atlast no effective thrust from the motor and it crashlanded moments after hand-launched.
But this stuttering doesn't happen,when i increase the throttle slowly from zero to full position.

Why does this happen?
Note: ESC is calibrated.

 

[Mr Man]

Sounds like the motor mounting bolts might be sticking too far into the motor. This can destroy the motor or esc if the bolts are touching any wires

 

[Merv]

Is it safe to conduct this propeller test by holding the powerpod by one hand.

Power pod held by hand, NO not safe.
Put power pod in the plane. If the plane has landing gear you are set. If no gear, put the plane on a table or workbench the prop hanging over the edge. A plane held by hand will be far safer. Use the Tx for the test, not a servo tester. The servo tester might not produce the same RPM's in the motor.

 

[Merv]

... the motor stutters by giving some sound when i push for full throttle suddenly....Why does this happen?...

Could be a timing issue.
If you can, try a different timing setting on the ESC

 

[Karthik1130]

Could be a timing issue.
If you can, try a different timing setting on the ESC

i have used simonk 30A ESC. is it possible to program the timings of this ESC by using transmitter throttle stick?i don't have any idea.

 

[Karthik1130]

Hello all,
This is the plane which was maiden and returned safely.I used Bamboo dowels for V-tail pushrods as the regular 1mm steel pushrods were bending and flexing during servo movement. How to avoid bending of pushrods?