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T-REX 250 › Wich tail blades do you use ?
04-09-2010 08:59 PM  8 years agoPost 1
HSC

rrNovice

Slovenija

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Hello !

Wich tail blades do you use on your 250 T-rex and what is your exspiriences ?

There is few option avaliable :

- Original 37 mm
- Original 42 mm
- Karbon Align 40mm
- Kbd 40 mm
- Any other option................

Curently I runing the 37mm ones, the hold is good, only a litle unconsistent during piroueting, like old gyro setup GY 401 if you remember ( I runing quark, S9257 )

Regars

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04-10-2010 12:05 AM  8 years agoPost 2
rocco.sj

rrVeteran

California,

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I use the carbon tail blades. Alot better then the plastics ones.( IMPO.) The carbon seems to be more accurate on the tail stopping vs. the plastic ones.
Basically, try each one of them and see which one is more suitable for your flying style.( Mines is the carbon.)

Cheers,
Ray F.

JR Americas
Evo Power Battery
Radio Frequency RC

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04-10-2010 02:36 AM  8 years agoPost 3
Graybug

rrApprentice

Melbourne, Florida

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Ray,

Do the carbons give you more TR authority, or just better response? Also, any change in gyro setting between plastic & carbon?


If something hasn't broken on your helicopter, it's about to!

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04-10-2010 03:32 AM  8 years agoPost 4
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I'm using the 42mm square blades. I had the 40mm "Batman" blades on before. I have so much slop in my tail that I don't think it matters what blades I am using. I need to fix the slop first, and then I can decide what blades are best.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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04-10-2010 03:45 AM  8 years agoPost 5
NQNA

rrElite Veteran

USA

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I run the stock Align short blades.

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04-10-2010 03:45 AM  8 years agoPost 6
rocco.sj

rrVeteran

California,

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Carbon tail blades does give you both tail authority & better response.(IMPO)

Also your gyro gain will be alot lesser vs. plastic tail blades, due to less flexing.
All this info i've been sharing has been tested and proven to be accurate.

The only way you can find out about this test we did is through doing tic-tocs,piros,and hard climb out(upright/inverted).
You will see the tail more solid , more crisp and smooth on the piros stops and also in the wind.

JR Americas
Evo Power Battery
Radio Frequency RC

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04-10-2010 02:35 PM  8 years agoPost 7
Graybug

rrApprentice

Melbourne, Florida

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I'm sold on the carbons...thanks, Ray!


If something hasn't broken on your helicopter, it's about to!

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04-10-2010 02:41 PM  8 years agoPost 8
celihopter

rrApprentice

Planet Earth first on the left..

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I use stock blades cut down to about 30mm.

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04-11-2010 07:54 AM  8 years agoPost 9
HSC

rrNovice

Slovenija

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30mm

This is a lot.

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04-11-2010 12:02 PM  8 years agoPost 10
Richardmid1

rrProfessor

Leeds, England

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The stock 42mm blades are the best ive found. Shorter blades allow you to increase the gain but you loose overall tail power.

60% of the time, it works every time!

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04-14-2010 03:00 AM  8 years agoPost 11
Graybug

rrApprentice

Melbourne, Florida

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Bought carbon tail blades today & tried them out. Most excellent! I was using the 37mm plastics, which are fine, but since I'm turning my 250 into a scale MD 500E I needed more T/R authority to compensate for the weight gain. I tried the 40mm plastics that came with the kit but had to decrease the gyro gain. BUT, my check-out flight with the new 40mm carbons was perfect! Didn't have to decrease the gain at all--had the same settings as the 37mm plastics.

I checked the weight of the 40mm plastics and found that they were ~2% different...that could be why I had to dial down the gain since the weight difference added a bit of vibration. But the carbons are a perfect match, hence no gain change.

Like I wrote before, I'm sold!


If something hasn't broken on your helicopter, it's about to!

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02-08-2017 07:38 AM  19 months agoPost 12
1flyguy

rrNovice

Ca, Los Angeles

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KBDD best for a wag tail

KBDD Team Pilot,

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02-08-2017 08:35 AM  19 months agoPost 13
Richardmid1

rrProfessor

Leeds, England

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Tight tail control rod ball links, bent tail control rod, using a steep throttle/V curve and going solely off gain numbers in the TX were peoples main issues with the 250 tail.

I could go into it further but this thread is 7 years old and the Trex 250 pretty much doesn't exist anymore.

60% of the time, it works every time!

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