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Other › Successful First Flight on Trex
05-02-2005 04:45 PM  12 years agoPost 1
bubblehead

rrApprentice

Elburn, IL

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I bought a Trex last fall when they first came out but did not have time to build it until this spring. Yesterday I completed it and test hovered in the basement because it was very windy outside. I enjoyed a very successful first 10 minutes of hover time, thanks to these forums and "Trex tuning." I set the throws, throttle, collective and expos up like "tuning" suggested and although it was touchy it flew fine. Much better than my first hovers with the Shoguns. So far I like it!

It seemed to have plenty of power and after 10 mins of hovering the battery and motor were cool to the touch. I'll check the charger when I get home to see how much power I used during the flight.

Here's my setup:

Align metal swashplate
Align new ball links
Align new servo link hardware
Berg 6 ch receiver on 50 Mhz
Futaba FP 7 UAS Super Transmitter (old but still pretty good!)
HS-50 tail servo
HS-55 cyclic servos
HS-56 collective servo (I wanted 3-56's but the hobby shop only had one left!)
Futaba GY240 gyro mounted upside down under the frame between the skids
Phoenix 25 ESC with latest software
TP 2100 Lipos
JustGoFly 400DH w/8 tooth pinion (had to slightly lengthen the motor mount screw slots)

I'll start tweaking tonight and will measure head speed. It's supposed to warm up later this week and perhaps I can try some FFF at the park. Gotta paint that canopy too!

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05-02-2005 04:54 PM  12 years agoPost 2
infinitemass

rrApprentice

New Jersey Shore

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You don`t have any radio glitching with your antenna wire coiled around the boom support like that?

How did THAT get in there?

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05-02-2005 05:15 PM  12 years agoPost 3
Oh deary me

rrNovice

UK

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I've heard that you can get glitching when antenna is wrapped around boom support.
One of the weakest points of the Trex is that under carriage, so be careful , any hard landing and that gyro will get bashed about. Apart from that it looks great

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05-02-2005 06:30 PM  12 years agoPost 4
bubblehead

rrApprentice

Elburn, IL

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I've tried the antenna in several different configurations on the Shogun and couldn't tell one from another for range. Since I was in the basement I could not do a very extensive range test. When I get a chance outside I'll let you know what I find.

I am planning on changing to a small antenna - I think it is from E-cubed - so soon I won't have the coil going up the boom support.

The landing gear took a couple of bounces last night just fine. I've used Mario's gear on a Shogun with great results so maybe I'll switch to a set if those. I don't love the current gyro location but I could not see a better spot at least for starters. I did not want to take the time to make a mount for up on the boom and I wanted easy access to the gain pot and switches. I think I'll put a cable tie around it just for added security.

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05-03-2005 09:45 AM  12 years agoPost 5
abbenhuys

rrNovice

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Let's be clear about the landing gear: You will break it when you land/crash hard, and the gyro will get 'smashed up a bit'.

It's supposed to be mounted right above where the boom enters the frame, but I've also heard (and seen evidence - a friend had a nice dent in the side of his 401) with crashes, that the blade will strike the gyro when mounted there as well!

SO... I ziptied my shrinkwrapped berg 5 to the outside of the rear frame and mounted the gyro (240) inside the frame right underneath where the boom enters the frame. It doesn't fit perfect, but nothing a ziptie and double sided tape won't mount.

Hope this helps

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05-03-2005 09:48 AM  12 years agoPost 6
abbenhuys

rrNovice

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DUH! Sorry... I should have looked more closely at the pics! I have the newer version with the topmount on the frame for the gyro. BUT... you shouldn't put it there anyways!

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05-03-2005 01:39 PM  12 years agoPost 7
YeTun

rrApprentice

Asmara, Eritrea

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Surprised
I have V2 as well, my frame is not like that. My frame is the same as 450x.

If there is no such place for Gyro mount, where is it suggested?

Your Practice and Patience only succeeds!

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