Align t-rex 150 and 150x parts compatibility

[abit late]

Thanks. Ordered the upgrade kit earlier today. The longer blade holders aren't available separately in the UK at the moment. Am running a micro spirit on my 150 DFC and the extra resolution will help me dial it in.

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[HeliSmith]

Originally Posted by DPW

I would not think extra 1.5mm in shaft length would make any difference in flight. The upgrade or increase in rotor arm length should make a improvement but again long or short shaft should not affect flight.

New Long Shaft
150 Main Shaft H15H014XX $6.99
Stainless steel Main Shaft 52.6mm

1.5mm seems like such a small number but then I think, well, if the total throw is 10mm then 1.5mm is 15% ... which would definitely be noticeable.. But I don't have the two shafts to truly compare total throw increase ... If it was noticeable it should slow down the roll rate

[lakodathecat]

Just installed the upgrade shaft and arms. It does make a difference in 150, not 150x, more cyclic throw. The geometry is not square with it. Arms are angled down. Looks wrong as can be, but works great. Gives like 2 degrees more cyclic both directions. Wont work with 150x I believe. Really necessary if put 150x grs in 150. 150x grs seems to have less cyclic throw then a 150 mrs. Putting 150x parts into a 150 is not nearly straight forward performance wise. I ended up disabling auto level (it did work but poorly and caused other 150 problems) and went with manual 3d setup. Flys fantastic now, zero movement piro if that is important to you. Very frustrating getting mixed parts configured.

[johnniechang]

Originally Posted by lakodathecat

Just installed the upgrade shaft and arms. It does make a difference in 150, not 150x, more cyclic throw. The geometry is not square with it. Arms are angled down. Looks wrong as can be, but works great. Gives like 2 degrees more cyclic both directions. Wont work with 150x I believe. Really necessary if put 150x grs in 150. 150x grs seems to have less cyclic throw then a 150 mrs. Putting 150x parts into a 150 is not nearly straight forward performance wise. I ended up disabling auto level (it did work but poorly and caused other 150 problems) and went with manual 3d setup. Flys fantastic now, zero movement piro if that is important to you. Very frustrating getting mixed parts configured.

Have you ever try to increase rates in grs app? Original expert setting is quite slow and after tweaking my grs has same roll rate as mrs now. The only downside is the very slow attitude mode.

[lakodathecat]

Thanks I had the roll rate to 96. Can't trust in app, so I always set heli-upgrades with a digital pitch gage, 10 pitch and 8 cyclic. Out of the box 150X GRS in a 150 full cyclic is like 4. The longer arm/shaft increase it to 6. Then by ignoring the app you can increase the cyclic to 8 by increasing the travel.

[martinwl]

Sorry for asking again, just to clarify, can I just buy the new control unit HEG15002 and use it with the ESC of my old T-rex 150 or do I need both, new control unit (HEG15002) and new ESC (HEG15003) to upgrade the heli?