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HelicopterMain Discussion › What is your Trex 250 like in flight? On hold 250 is MIA
09-03-2012 03:23 AM  5 years agoPost 1
Bouchah

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Willow Spring, N. Carolina USA

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I flew a few flights tonight when I arrived home from work. I am wondering how other 250's compare to mine in flight characteristics. Mine, when in forward flight scoots across the sky then it balloons up, enough to where i simply piro 180deg. to complete the stall turn, then start scooting the other direction.

When hovering, some times it will sit still in a hover other times it wants to tip forward and to one side or the other. Not necessarily the same side on all flights.

This is what I am experiencing with mine, Im wondering if others notice the same behaviors or should I start replacing some parts. My swash plate does seem to have some slop in it which does travel up to the blade grips if I rock the blade back and forth with my fingers. I purchased the heli used so I never felt the head when it was new and tight.

As for the wandering during hover, I just thought about this, I do have two different types of batteries, Align 850 Mah and Sky lipo 800 Mah, they are nearly exact in size but I have not weighed them to compare. Maybe the heavier one tilts the nose down and caused drift. I try to install the batteries in the exact position every time as to not cause it to be nose heavy but I dont know how slight of a difference of battery position will make on this small bird.

Any thoughts?

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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09-03-2012 03:35 AM  5 years agoPost 2
gmcullan

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Southbridge, MA

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I have two of the first generation combos. Being small and light, wind has a greater effect on them than it would on a larger heli. The balloon to a certain extent in fast forward flight into the wind, exspecially in response to gusts. But they are predictable and fun. I'm comfortable enough with them to fly them in 15 mph with gust to 20 mph.

I also use the ballooning as an excuse to kick it up into a stall turn and zip back the other way. Great fun!

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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09-03-2012 03:40 AM  5 years agoPost 3
Bouchah

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Willow Spring, N. Carolina USA

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How about the slop in the head, is yours like that or is it fairly tight from the swash to the blade grips?

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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09-03-2012 02:50 PM  5 years agoPost 4
gmcullan

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Southbridge, MA

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Oh heck yes, all the slop you can imagine. The only things I've replaced on these helis are the tail belts, tail belt pulleys, and gears. If they drift, I just don't notice it.

In general, the smaller helis are twitchier than the larger helis. Problably since I have so many of the little ones and fly them so much, I just don't notice drift tendencies. After throwing around the small ones, my 450's almost feel like non-responsive barges.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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09-03-2012 03:31 PM  5 years agoPost 5
rpat

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Weirton, W. Va.

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I have the pro and the other day in the back yard with , I guess about b 7-10 MPH wind the heli was not very stable in a hover. IT was one of those things that you constantly had to be moving the sticks to keep it in one place. As far as the ballooning goes it is probably from the fly bar. We are all flying so much FBL now that when we do fly with a fly bar we forget just how much the FB version would do that.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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09-04-2012 03:24 PM  5 years agoPost 6
cudaboy_71

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sacramento, ca, u.s.

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i had the v1 250, originally w/ flybar...using stock paddles, later SE paddles, then the original 3G and finally a beastx. aside from being light and darty (nothing you can do about that), it flew just like my larger helis. there were never any ballooning tendencies, or anything out of the ordinary.

typically ANY flybarred system will balloon up in fast enough forward flight. FBL systems do it too, but tend to auto-correct for it to some degree.

i'd think if you're really having trouble your CG might be off.

if it ain't broke, break it.

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09-04-2012 04:29 PM  5 years agoPost 7
BladeStrikes

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Shelby TWP,Mi

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Bouchah
What is your Trex 250 like in flight?
I flew a few flights tonight when I arrived home from work. I am wondering how other 250's compare to mine in flight characteristics. Mine, when in forward flight scoots across the sky then it balloons up, enough to where i simply piro 180deg. to complete the stall turn, then start scooting the other direction.
When hovering, some times it will sit still in a hover other times it wants to tip forward and to one side or the other. Not necessarily the same side on all flights.
This is what I am experiencing with mine, Im wondering if others notice the same behaviors or should I start replacing some parts. My swash plate does seem to have some slop in it which does travel up to the blade grips if I rock the blade back and forth with my fingers. I purchased the heli used so I never felt the head when it was new and tight.
As for the wandering during hover, I just thought about this, I do have two different types of batteries, Align 850 Mah and Sky lipo 800 Mah, they are nearly exact in size but I have not weighed them to compare. Maybe the heavier one tilts the nose down and caused drift. I try to install the batteries in the exact position every time as to not cause it to be nose heavy but I dont know how slight of a difference of battery position will make on this small bird.
Any thoughts?
Bouchah,
If I was you,I would for sure go FBL on the Trex 250..You'll for sure get rid of slop in the head and it flys MUCH nicer.Mine used to pitch/balloon in forward flight but never did it again once I went FBL..As for lipos,get some Gens Ace 20C 800mAn packs from HobbyParts .They hold and make WAY more power than the 35C Aligns and under $5.00 bucks..The balance was perfect and fit nice with the canopy on,Align 850mAh about rubbed the top of the canopy..Heres mine on a 15 MPH day and you can see it handles wind awesome..The only thing i'll say if you plan on going FBL is stay far away from the Align FBL systems.
Im bringing up FBL because if you switch it over,you'll love the Trex 250 even more..

Watch at YouTube

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09-04-2012 05:27 PM  5 years agoPost 8
jschenck

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La Vista, NE.

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Check for slop in the head that you can remove easily like loose screws or loose ball links, especially in the blade grips. I found when I took the trouble to adjust swash level with a leveler it did help.

250's are really sensitive to paddle alignment also. Make sure they are dead even with each other and flat at zero cyclic.

My 250 DFC flies way better than the flybar'd 250 just because it removed so much slop from the head. When the flybar'd were new they flew well. I'm sure with new bearings and a careful setup the 250 flybar'd would fly really well again.

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09-04-2012 09:58 PM  5 years agoPost 9
Bouchah

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Willow Spring, N. Carolina USA

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Thanks for the replies guys but at the moment I dont have to worry about how it flies. I was flying over a bean field and she went in. I was by myself and thought I saw where it went in but when I started looking it was not there. Ive spent about 7 hours bent over walking up and down bean rows. Luckily my two kids have volunteered to help as well. Ive brought out a paint spray can to mark the ends of the rows that we checked. This is such a crappy feeling, crashing is one thing but completely loosing it is horrible. The hunt continues tomorrow morning.

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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09-04-2012 10:45 PM  5 years agoPost 10
BladeStrikes

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Shelby TWP,Mi

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Very sorry to hear this and hope ya find it..

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09-04-2012 11:19 PM  5 years agoPost 11
gmcullan

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Southbridge, MA

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Never lost a heli, but have had fixed wing fly away. I managed to find all but one. For that one, I even spent hours in a Piper J3 flying low and slow over the farm / woodland area in which it headed out over. Never found it, but it sure was a great excuse to build hours in my log book. That was back in '78 just before I took my Private Pilots tests. But I was signed to solo, and also signed off in the J3.

The lost bird was a 60-size Das Ugly Stick with a low time Enya 60, relatively new Kraft 4-Channel radio system, and covered with bright orange / yellow Monocote. Yes, I still miss that plane. It was a great flier.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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09-05-2012 02:30 AM  5 years agoPost 12
rpat

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Weirton, W. Va.

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gmcullen
Did you have your name in the bird? Actually AMA rules state that you have your name and address in the plane, and if you did than she must really be lost for some one not to turn it in to you.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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09-05-2012 06:07 PM  5 years agoPost 13
dkshema

rrMaster

Cedar Rapids, IA

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Bean fields can be an ugly place to have to look for a small heli. Not quite as bad as a stand of corn, but a 250 in soybeans isn't going to be easy to spot.

Good luck on the hunt.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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09-05-2012 08:57 PM  5 years agoPost 14
jschenck

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La Vista, NE.

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I dropped my 500 in some beans in the middle of the summer. Took a bit of hunting to find it. I put a flying wing in a few years ago too and would never have found it if I didn't hear the motor zipping the prop when I was throttling it. 250 is going to be TOUGH to find, sorry to say.

years ago I helped my brother in-law look for a 60 sized trainer in a corn field, didn't find it. 3 months later the farmer walked over to the club and handed it back still in one piece. not so much as ripped monokote. Too bad the mice had eaten all the insulation off the wires and the engine was rusted solid. wing had water in it too.

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09-05-2012 10:13 PM  5 years agoPost 15
Bouchah

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Willow Spring, N. Carolina USA

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Thanks for the well wishes, still have not found it. Spent another 3.5 hrs in the field today, that puts me at about 11 hrs of walking up and down bean rows bent over most of the time. I have to work one more day then I will be able to really get the search on. The plants range between 1.5' and 4' tall. Its hard to bend over and its hard to stand up straight, my back has seen better days. I keep thinking I am getting close, then I move over to the next row.

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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09-05-2012 11:00 PM  5 years agoPost 16
Riq

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ND

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Been there done that.

It never shows up where you thought it went in, at least in my case.

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09-06-2012 02:11 AM  5 years agoPost 17
dkshema

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Cedar Rapids, IA

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If you can find someone to lend you a metal detector, and have a good idea of where it might be, there should be enough metal in the motor and servos to find it. Kind of a long-shot, but after already wading through beans for a couple of days with no success, this may help.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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09-06-2012 02:20 AM  5 years agoPost 18
gmcullan

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Southbridge, MA

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Regarding having my contact information on my lost plane, yes, I was an AMA member at the time and did have my contact information both inside and outside the fuselage. It's the only plane I never found. Full tank of fuel, full throttle, and trimmed for a gentle climb. Full ground and air search, then door to door to any property along the projected path of the flight. I tend to believe that it was found and then kept by a less than honest person.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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09-06-2012 03:56 AM  5 years agoPost 19
Bouchah

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Willow Spring, N. Carolina USA

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A metal detector has crossed my mind. I still have a few hundred rows of beans to check first though

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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09-07-2012 01:12 AM  5 years agoPost 20
Bouchah

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Willow Spring, N. Carolina USA

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Another 3.5 hrs put towards the search today, still no luck.

I drew up a little map of the field Im working in. No work tomorrow, hopefully I can get this thing found and be done with this.

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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HelicopterMain Discussion › What is your Trex 250 like in flight? On hold 250 is MIA
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