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250 Class Electric Helicopters 250 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar. |
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02-11-2012, 08:48 PM | #1 (permalink) |
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Join Date: Sep 2011
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Trex 250se 3GX (Fully loaded)
I did a fun (and extremely expensive) experiment. I bought 2 Trex 250SE kits, one I build stock and the other one I squeezed every single after market upgrade available today. This thing ended up costing more than a Trex 700e v2 3GX.
I then went to the field (Central Park great lawn) and tested both helis to see the difference between the two same but very different birds. Highlights: 1. Not sure if its the Microheli tail assembly upgrade or DKS 95i tail servo but the tail wag that 250 is prominent for is absolutely gone. Huge plus! 2. Weight? Well as you could imagine, this guy is heavy! 310 grams without battery 390 grams spool up weight (with TP 850 65C battery) 3. The biggest difference is the quick response. These servos are increible. Tjey move several steps ahead of the stock servos. I recommend if you are willing to pay up. The only thing is that fitting them into the frame is a head ache. Specially since stock rods need tweaking. 4. Looks? well, see for yourself. I love the orange theme, looks great in the air. |
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02-12-2012, 08:27 AM | #2 (permalink) |
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Join Date: Apr 2009
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One word - WOW!!!
And three more words - I want one! Great job!!! |
02-12-2012, 10:08 AM | #3 (permalink) |
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Join Date: Jun 2011
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Im glad im not the only one willing to put as much into this as a bigger bird. The only difference from your setup to the one im building is that im using the DS92A+ servos for cyclic and the AR7200BX for less of a mess with the wiring.
The birds look absolutely beautiful though! Enjoy your new machinces |
02-12-2012, 01:19 PM | #4 (permalink) |
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Join Date: Jul 2011
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Expensive. DS95 for cyclic are overkill imo but hey! Who says its a bad thing. I particularly like the orange frame. Probably my next buy. But ill get red cause it match my canopy. And i too have the AR7200BX. But i cant fly cause its - 1 000 000 degre out here.
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02-12-2012, 02:24 PM | #5 (permalink) |
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Join Date: Mar 2010
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WOW, I love it.
Is there any chance you could list all the upgrades, I'm torn between converting my Trex 250 to FBL and upgrading all/most of the parts or waiting for the Blade 300X. Cheers Steve
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Blade 180CFX | 300X MSH Mini-Protos 3S, Spirit FBL Parkmaster 3D, Funjet, Sbach 3D, FrSky Taranis, FPV260 Quad, Pheonix Sim |
02-12-2012, 06:06 PM | #6 (permalink) |
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Thread Starter
Join Date: Sep 2011
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- Extreme orange frame
- KDE bottom plate - KDE battery mount - Microheli Tail assembly - Microheli mani gear - Microheli tail gear - Screwz steel screw upgrade for 250 - 3GX - 3x cyclic servos 95 - Tail servo 95i - Xtreme head dampeners - Edge main & rotor CF blade - Align metal tail boom mount - Microheli Aluminum tail boom support - Scorpion motor - Xtreme metal bearings (main shaft) - Xtreme aluminum hex bars (extra support for frame) Last edited by Nlgravity; 02-12-2012 at 10:59 PM.. Reason: Forgot some upgrades |
02-15-2012, 02:54 AM | #8 (permalink) |
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Join Date: Jan 2012
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Very nice, I could be wrong but why havent you used weighted grips?
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02-15-2012, 05:07 PM | #9 (permalink) |
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Join Date: Jan 2011
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Your 250 is awesome...nice job! Really dig the orange frame!
Mine is pretty close to yours except I couldn't justify what you did with the servos (see attached)..... |
02-15-2012, 11:24 PM | #10 (permalink) | |
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Join Date: Sep 2011
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Quote:
--- I am here: http://maps.google.com/maps?ll=40.744512,-73.993207 |
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02-16-2012, 09:08 AM | #11 (permalink) | |
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Join Date: Jan 2011
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Quote:
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02-16-2012, 12:58 PM | #12 (permalink) | |
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Join Date: Sep 2011
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Quote:
But I love it. It is as steady as a Trex 700. And the tail wag is gone (not sure if is the MH tail or 95i tail servo (or possibly both). But I like the tail a lot! |
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02-16-2012, 01:09 PM | #13 (permalink) |
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It's the servo, not the tail.
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TRex 250 DFC | TRex 250 DFC (Scale) 2 @ TRex 450 DFC | TRex 450 Pro 3G (Scale) TRex 550 DFC DX8 + Telemetery on all |
02-21-2012, 11:31 AM | #14 (permalink) |
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Thread Starter
Join Date: Sep 2011
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Do you know what is the sweet spot for gain values in 3GX when using with 250?
This weekend I tookj my helis for a long day of flying (car battery fed my TP charger thousands of volt to continually charge my batteries @ field). And I realized that during very fast forward flight,, the 250 has a bit of tail wag. Other than that, the performance was unbeliabable! |
02-21-2012, 12:35 PM | #15 (permalink) | |
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Quote:
It's one of those things that is plainly written in one of those hover-over baloon explanations, but most people never see it until they look for it, myself included. Out of the box, my gain was in the mid 30s and it held OK. Once I adjusted the internal gain so that the radio was up around 60 the tail held much better. Joe
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TRex 250 DFC | TRex 250 DFC (Scale) 2 @ TRex 450 DFC | TRex 450 Pro 3G (Scale) TRex 550 DFC DX8 + Telemetery on all |
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02-22-2012, 12:19 AM | #16 (permalink) | |
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Join Date: Sep 2011
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Quote:
Didn't get the part of ballon hover.... |
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02-22-2012, 06:12 AM | #17 (permalink) |
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Yes you should set it up with the PC and adjust the gain for best results. The hover over is when you put the mouse over the option, a balloon pops up explaining the feature. I should have explained better.
Joe
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TRex 250 DFC | TRex 250 DFC (Scale) 2 @ TRex 450 DFC | TRex 450 Pro 3G (Scale) TRex 550 DFC DX8 + Telemetery on all |
02-23-2012, 09:32 PM | #18 (permalink) | |
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Join Date: Dec 2011
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Quote:
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02-24-2012, 10:28 AM | #19 (permalink) | |
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Join Date: Sep 2011
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Quote:
They are not labeled as "250 blades". You have to go by size |
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