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Other › Finally a TRex that flies like a 90
10-16-2005 10:52 PM  13 years agoPost 1
sumonzu

rrApprentice

San José - Costa Rica

My Posts: All  Forum  Topic

After having tried several sets, motors, ESC and after having read carefully all the suggestions posted here and in other forums, I put together a TRex that really flies and feels practically like my Fury Tempest 90 3D!


(see my gallery for more pictures)

Here the list of all components; maybe someone looking for an "(almost) perfect machine" can find my set up interesting (and can save money...)

Frame : CF HeliUp CCPM. A work of art! Perfect for the HS56 servos, ultra rigid and incredibly STRONG!
Motor: 450TH 11T. Really powerful and light, it stays cool even after 10 minutes almost full throttle. Used with 4S: I can reach VERY easily 2900 rpm with carbon blades (could go up, but they are more than sufficient for making any maneuver) almost no rpm drop from hovering to full pitch (+ - 10)
Battery: TP 2000 4S (14,8 Volt)
ESC: Kontronik 40-6-18 (this is the best I ever had: governor mode is awesome. I have Align 35 and CC 35, but I would have bought the Knotronik first and saved money!)
Gyro: Futaba GY 401(tail stable and precise like my Fury)
Tail servo: Futaba mini Digital S9650 (little big, but perfect with the GY 401)
Swash plate servos: HS56
Receiver: Micro Futaba PCM R146iP (no glitches, no interferences)
Blades: Mavrikk carbon 305 mm (just got the 320mm but not yet tested)
Main rotor and mixers: Align metal
Blade grips: Align metal (soon will substitute with the HeliUp ones with thrust bearings)
Swash plate: Micro Heli metal
WholeTail Rotor system: Micro Heli metal

I tell you that I was about to abandon the TRex adventure due to the so-so performances with 3S battery (tested and discarded Align 2800kv; good performance - but not enough - with AON 3500). Who wants to have a machine that does what YOU want, go for the 4S battery: I'm going to test soon the AON 3500 with the 4S configuration.

That's all folks

Marcello

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10-16-2005 10:55 PM  13 years agoPost 2
Heli88

rrKey Veteran

Clarkston, MI

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Looks great, how about some video?

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10-16-2005 10:58 PM  13 years agoPost 3
sumonzu

rrApprentice

San José - Costa Rica

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I'll make a video in the near future if possible.

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10-16-2005 11:10 PM  13 years agoPost 4
noviceclass

rrNovice

Orange County, Ca

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Great Setup and pictures. Interested in how you secured your canopy to the body. Thank you.

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10-16-2005 11:19 PM  13 years agoPost 5
wildstallionuk

rrKey Veteran

ENGLAND, FOLKESTONE, KENT

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I got a similar setup mate but with all Heliup stuff, and a Neu instead. Im currently running 320's on a stretched machine. I was thinking of trying 305's after you try 320's would you share your views as it could save me the bother one day.

Check out the items I have for sale in the clasifieds including a CSM 420

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10-17-2005 12:03 AM  13 years agoPost 6
crewchief_432

rrNovice

Groveland,fl.

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I couldnt get the heliup blade grips to work with the align head they where to loose. I might have been doing something wrong though. If yours work let me know so I can put mine back on.

Did I do that ???

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10-17-2005 12:05 AM  13 years agoPost 7
MikeInMobile

rrElite Veteran

Mobile, Alabama

My Posts: All  Forum  Topic

A 400DH with an 11 tooth pinion ALSO flies like a Raptor 90. I have a carbon fiber HDE (my own frame design) using a 400DH/11 tooth combination, and TP2100 3S Prolites. The headspeed is 3200 RPM and the machine tracks like it is on rails. Because of the high headspeed, I had to install ceramic hybrid bearings in the tail and output gear. Using Maverick carbon blades and Jet Hobby carbon fiber tail blades. The machine sounds like a turbine in flight !

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10-17-2005 03:19 AM  13 years agoPost 8
Mhw

rrApprentice

earth

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whats the weight?

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10-17-2005 06:50 PM  13 years agoPost 9
sumonzu

rrApprentice

San José - Costa Rica

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Weight 725 gr.

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10-17-2005 07:12 PM  13 years agoPost 10
steph

rrKey Veteran

Hampshire England

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Hi MikeInMobile

I allso have the 400 dh with the 2100 tp pro i use a 9t pinion the weight of my trex is 630g i am thinking about trying the 11t pinion may i ask your flight times i am getting 8 to 10 min flight time and the performance is excelent
On the 11t pinion do you know what your amp draw is max pitch

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10-17-2005 11:42 PM  13 years agoPost 11
MikeInMobile

rrElite Veteran

Mobile, Alabama

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Don't really know, but the CC35 and 2100 Pro-Lites don't seem to care. My headspeed is fairly constant with a throttle curve of 0-85-90-95-100. I fly FAI, so my throttle curve is VERY simplistic. With an 11 tooth pinion, the headspeed will increase beyond the safety region for wood blades. I use the Maverick carbons and Jet Hobby carbon tail blades. I also had to change my tail shaft bearings to ceramic hybrid to pervent problems. This does get expensive, but the machine flies great.

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10-17-2005 11:57 PM  13 years agoPost 12
ShellDude

rrElite Veteran

East Coventry, PA

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Would you like some tail with that servo?

Wish they'd hurry up and figure out a way to make tough fast "micro" digital servos.

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10-18-2005 12:37 AM  13 years agoPost 13
sultan68

rrApprentice

Broomfield, CO Elevation 5420'

My Posts: All  Forum  Topic

Bearing source?
Mike, where do you get the ceramics for the T-Rex?

Thanks,
Chris

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10-18-2005 12:44 AM  13 years agoPost 14
crewchief_432

rrNovice

Groveland,fl.

My Posts: All  Forum  Topic

http://www.bocabearing.com has ceramics for the trex and most all other rc use.

Did I do that ???

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10-18-2005 12:45 AM  13 years agoPost 15
MikeInMobile

rrElite Veteran

Mobile, Alabama

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Boca Bearing ...... (http://www.bocabearings.com/). The bearings for the tail gear assembly are 3mm ID / 8mm OD / 3mm Thickness. The part number for 4 of them is YCHB83-ZZ and costs about $27.00 ..... not a bad price for 4 ceramic hybrids! Since the Microheli tail box uses the same bearings as the tail output gear, it was a no-brainer.

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10-18-2005 12:58 AM  13 years agoPost 16
Hunter69

rrNovice

California

My Posts: All  Forum  Topic

Nice setup sumonzu,

I'm glad you found another great setup. How is the futaba 9650 tail servo working for you? I was going to try that on my setup too. I got a HS 50 now and it seems to hold pretty well so far, But digital servo center better than most of the regular servo. I just got a couple of HDS 877 digi servo, they are a great price for a small digital servo, same size as a HS56. http://www.allerc.com/product_info....roducts_id=1813

Here is my setup, i'm pretty happy with it too. http://www.runryder.com/t204930p1/

I'm planning on getting a 3rd heli setup and wondering what other hot setup is out there.

Thanks for sharing Sumonzu,

cheers,

Hunter

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10-18-2005 01:05 AM  13 years agoPost 17
ShellDude

rrElite Veteran

East Coventry, PA

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I'm really interested in those new micro digi servos. Haven't seen much feedback as far as usage goes though.

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10-18-2005 02:47 AM  13 years agoPost 18
OICU812

rrMaster

Edson, Alberta, Canada

My Posts: All  Forum  Topic

9650 servos are strong enough they are the recommended servo to run the swash on a Logo 14, should there be anymore needed to mention?? Anything I have read says nothing but positive about them.

...Once upon a time there were Nitros, flybars and frequency pins...

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10-18-2005 03:04 AM  13 years agoPost 19
ShellDude

rrElite Veteran

East Coventry, PA

My Posts: All  Forum  Topic

I'm not really interested in the swash... truth be known I do just fine with HS-55s for my head.

Its the high speed tail servos which I'm looking for more info on... something that doesn't dwarf my boom like the one above (which I'm sure is an awesome setup).

Shell

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10-18-2005 07:34 AM  13 years agoPost 20
sumonzu

rrApprentice

San José - Costa Rica

My Posts: All  Forum  Topic

Hi Hunter,

" How is the Futaba 9650 tail servo working for you? I was going to try that on my setup too."

It is very precise and constantly centered being a digital, I have used the HS50, it holds pretty well, but there is a BIG difference with the 9650, also the HS50 is very fragile. I think you will be happy with the 9650 and will feel the difference.

I've seen your setup, interesting and nice, the only thing I don't like is that you are using woodies at + 3000 rpm, everybody say it could be dangerous and risky. I suggest you try some carbon, will feel the difference for sure! I use the Mavrikk and I'm really happy.

Marcello

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