Spirit System https://www.spirit-system.com/phpBB3/ |
|
Flight Characteristics questions https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=790 |
Page 1 of 1 |
Author: | Scott H [ Fri 10. Jul 2015 0:10:56 ] | ||
Post subject: | Flight Characteristics questions | ||
I did my first flight today with the Spirit on a DT700, no governor. I noticed three flight characteristics that I've never seen before: 1)In forward flight the model slowly pitches down - Do I adjust the "elevator pitchup compensation" down - usually the models I've flown with other fbl systems I'm always fighting the model pitching up. 2) If in Forward flight I often run the tail to the left or right causing a full but only moderate speed piro (while continuing forward flight), when I did this today and at the portion of the piro where the tail was pointing to the forward momentum, the helicopter pitched downward. When I continued the swing so the tail was at the rear of the helicopter the heli reverted to the angle/pitch it was at prior to the piro. I've never seen that before. I'm guessing it's related to the same tune issue of number 1 above. 3) In testing the rescue feature (acro)- the aircraft leveled, but when I released the rescue switch the the heli tips back at some angle. 10 - 15 degrees (just guessing). What I know is that it doesn't stay in the level position and I did not have my fingers on the elevator/aileron gimbal. I didn't tune the heli at all, so I'm happy to follow the tuning guide, but in the meantime, I thought I'd ask about these characteristics. Anyway that was my observation. I've attached my saved settings file if that were to help. Thanks in advance
|
Author: | ZeXx86 [ Fri 10. Jul 2015 20:13:58 ] |
Post subject: | Re: Flight Characteristics questions |
Hello, thanks for your report. It seems that all the problems are related to one issue. I believe that the issue is in cyclic servo settings. Can you enable Subtrim (tuning) in the Servo tab and check if all servo horns are at 90° while the swashplate is perfectly perpendicular to the main shaft at the same time? This settings must be done with a cyclic leveler, inprecise settings may cause this. At this moment it looks like horizontal position is in some angle - angle that is also visible when the rescue is disabled. I do not recommend to change any other settings as this problem should not happen in any case when basic settings are OK. |
Author: | Scott H [ Sat 11. Jul 2015 0:46:28 ] |
Post subject: | Re: Flight Characteristics questions |
Zex, You were right on. I releveled the swash using subtrims in the software (which I only eyeballed my first time through). I just put one flight on the machine... all three of those tendencies are gone. I'm looking forward to flying the machine with this unit. After a few more flights I'm going to try to follow the instructions and get the governor working. Thanks Scott |
Page 1 of 1 | All times are UTC + 1 hour |
Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |