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Power Helis . CANOMOD . Experience RC

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e-Align T-REX 250-450-500-600 > Are you ready for this? 464gram T-Rex w/ 20 min fly times on a 1200mAH
 
 
rerazor
Elite Veteran
Location: Mich.

My Posts This: Topic  Forum

I agree on making a CF frame that is affordable. Hubdave (heliworkz.com) is working on a CF CCPM T-rex frame. His prices are the most affodable I have seen.

I really like the idea of being able to use smaller batterys (1320 and smaller) on this T-rex. Plus, the cheap replacement costs will make this a "win win" situation.

Nice job Jarod!!!!!!!
01-11-2005 12:59 AM
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jackheli
Elite Veteran
Location: Vancouver - Canada

My Posts This: Topic  Forum		The eCCPM servo arms seem pretty long to me.

What servos is he using? Would the standard Align servos be capable of holding the swashplate with these lengthy arms?



Anyone who has never made a mistake has never tried anything new
Albert Einstein
01-11-2005 02:34 AM
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flytech
Veteran
Location: Sunland, CA

My Posts This: Topic  Forum		Jarod, whats the word on the stretch kit with all this?

is any use trying to integrate the stretch kit to this plan or is that a waste at this point? i imagine the cd motor is not a good match for it and that it'll add more weight. i unfortunately ordered one but imagine it's a wasted investment if i go the direction of this thread.
01-11-2005 02:34 AM
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Jarod
Veteran
Location: USA

My Posts This: Topic  Forum		You could incorporate the stretch kit into this. Its purpose afterall was to increase climbrate and 3D power. Matter fact the stretch kit comes with a CF boom that you could always use in the lightened rex project. Just get a dremel with a cutting disc and cut it to stock legnth. I think that will save like .25 of an ounce. Go fly the stretch stock with gold boom for now. When you break all you stretch blades you will be left with a gold boom and a belt. I had two boom strikes so im just left with a belt. I saved the CF boom for the CCPM. The stretch kit would need a motor that would draw more power to swing the blades. I cant say without testing that the stretch would hurt the lightened rex. It is supposed to be more efficient so it very well may help us get more flight time? But for the most part I have found that these plastic heads just arent up to par with keeping blades that long running perfectly. The tolerances arent close enough with the parts in the head. So with smaller blades the plastic head is within tolerance and is easier to keep in the air flight after flight.
01-11-2005 02:45 AM
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Jarod
Veteran
Location: USA

My Posts This: Topic  Forum
Quote 
The eCCPM servo arms seem pretty long to me. What servos is he using?


He is using Pico BB servos. Check out the specs they are great. There supposed to be much better then Hitecs. Thats what I use Hitecs. But im begining to consider trying these out. They are 5grams and are supposed to be better then the Hitec equivalent.
01-11-2005 02:50 AM
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helicopterMark
Key Veteran
Location: Rumson, NJ

My Posts This: Topic  Forum		Model: GWS Pico BB Servo
Dimension: 22.8 x 9.5 x 15.5 mm (0.90 x 0.37 x 0.61 in)
Weight: 5.40 g ( 0.19 oz)
Speed @ 4.8 V: 0.12 sec/60 deg
Torque @ 4.8 V: 0.70 kg-cm (10.00 oz-in)

nice and light but the torque seems to be a little on the low end, although I suppose with the CCPM there will be less stress on any one of them as they tend to work together, looks like a neat little servo though, might have to give one (or three for that matter) a try.

EDIT: On second thought the torque is pretty good, I was comparing that the HS55, 56, etc that I have been looking at, but for that size 5.4 grams that puts out a good deal of torque...

MArk

Mark Schneider
Team MRC/Hirobo; Rotor Rage; Beam
Turbulence D3 | Hirobo 50 SDX | Beam E4
01-11-2005 03:04 AM
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Barry Janzen
Heliman
Location: Chattanooga, TN Posts: As many as needed!

My Posts This: Topic  Forum		Jarod.....help with motor details.

Jarod,

Have you been able to get more motor details? If he did get it from Slofly.com, then I would guess it is parts that come from GoBrushless.com that several of us have. Would love to make something close for my Hornet 2. If it works well, a T-Rex may be in my future as well!

Help us out here buddy........

Barry
01-11-2005 05:15 PM
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Jarod
Veteran
Location: USA

My Posts This: Topic  Forum		I am still waiting for him to get back to me. I had emailed him with a list of questions. I went to slofy.com to try and start ordering parts needed. His is a double stator and im not sure if he is using the stock can the kit came with. The motor kit they sell doesnt look like the motor I saw because the kits are all single stator kits. Here are the specs from the motor kit from slofly where he got his. The motor kit is really dirt cheap. I love this idea, of building my own motor. The more things I can control the less I need to rely on someone else. I think its so cool that we can just build any motor to perfectly match our applications. I just need to learn what all those motor parts do? I will post details when I get the info from him. For now this is the kit I believe he used.

Brushless motor kit GB1.1 BB
22.7mm Insulated Stator
Stock can for 22.7mm Stator
15-pk of N45 5mm X 5mm X 1mm Magnets
Stock Bearing Sleeve Holder
Stock Bearing Sleeve
Stock 3mm Shaft
3-Color Set (~25ft ea) of 26g Magnet Wire
2-pk 3mm X 6mm X 2.5mm Ball Bearings
01-11-2005 05:57 PM
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Art-Tistic
Senior Heliman
Location: Somerset, NJ

My Posts This: Topic  Forum		Jarod,
What we are all looking for is the GBx double stator kit which slofly doesn't have now because the manufacturer gobrushless has them on hold right now. The kit you mention (GBv is great for a HB for main or tail) The winding of the stator takes some practice but, once you've got that down you can crank out a motor in under an hour. I keep checking the gobrushless site to see if the kit has been released. Holy-S are they going to have a demand problem if this puppy becomes the ticket for the rex.

Regards,
Anthony
01-11-2005 06:10 PM
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Barry Janzen
Heliman
Location: Chattanooga, TN Posts: As many as needed!

My Posts This: Topic  Forum		Jarod,

Thanks for the details......actually I have all those parts and more laying in my CDrom box of parts. Have built several singles but need more details before I start a double. I'm sure several of us could come up with the setup, but learning from others is much faster. No reason to re-invent the wheel on things like this.

Barry
01-11-2005 07:08 PM
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Barry Janzen
Heliman
Location: Chattanooga, TN Posts: As many as needed!

My Posts This: Topic  Forum
Quote 
What we are all looking for is the GBx double stator kit which .........I keep checking the gobrushless site to see if the kit has been released


Guys,

GBx has the Endbells and Flux rings that are needed. Seems like the mount is the only thing missing. I think I can take it from here if I knew the wiring type (star/delta). Wouldn't you think 11 turns is a Star motor?

Barry
01-11-2005 07:51 PM
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Jarod
Veteran
Location: USA

My Posts This: Topic  Forum		Does this help?
01-11-2005 08:02 PM
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Enright13
Senior Heliman
Location: Nottingham, England

My Posts This: Topic  Forum		That looks nice,

but what's with the cap-head screw poking out of it?

BCingU
En ];-)
"Oi! Who put THAT there?"
01-11-2005 08:19 PM
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Jarod
Veteran
Location: USA

My Posts This: Topic  Forum		thats not pemanent its just to hold it inplace for the picture.
01-11-2005 08:22 PM
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avelez
Heliman
Location: Weston Florida

My Posts This: Topic  Forum		Base for motor

I noticed on the pics that the motor has a special mounting base. Is that base homemade by him, or can you purchase that.

Andres
01-11-2005 08:29 PM
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Jarod
Veteran
Location: USA

My Posts This: Topic  Forum		Nope its cutom made. I just talked to him for a second he was at work so I didnt want to start asking a bunch of questions. Im going to speak to him tonight. His motor flew the ccpm rex great. I agree lets not reinvent the wheel. Lets start with something thats works. His motor weighed 34 grams if I remember correctly and could deliver a head speed of 2000 rpms without getting hot or drawing very many amps. Sounds to good to be true. I have been looking all day for an off the shelf replacement but nothing is nearly as light as these kit motors.
01-11-2005 08:43 PM
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avelez
Heliman
Location: Weston Florida

My Posts This: Topic  Forum		That is great, maybe we can get all the info on how to make the motors and where to by the parts. I would love to be able to fly 20 minutes on 1200's.
01-11-2005 08:56 PM
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Barry Janzen
Heliman
Location: Chattanooga, TN Posts: As many as needed!

My Posts This: Topic  Forum		Jarod,

Thanks for the close-up. With my limited knowledge, that looks like Delta to me. Can someone else confirm that. Looks like the wire colors twist together and terminate at the ESC.

Quote 
noticed on the pics that the motor has a special mounting base. Is that base homemade by him, or can you purchase that.
That is the GoBrushless base with two sides ground off. This guy is SERIOUS about weight savings and I agree with him.

Quote 
but what's with the cap-head screw poking out of it?
Quote 
thats not pemanent its just to hold it inplace for the picture


Jarod, I have the same question.Where does the pinion go then? Shouldn't the shaft be coming out of that alum. mount with a pinion on it?

Barry
01-11-2005 11:00 PM
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GTMAXX
Senior Heliman
Location: Leetonia, Ohio

My Posts This: Topic  Forum		To Jarod and all involved with this wonderful project

Keep up the great work!! I've been following this post since it started!! I've got 2 T-REX's and the one kit is still in the box which will be built accordingly to this thread - right down to the wire!! Thanks for you guys posting exact details with pictures, it sure helps when understanding what is going on in these kinds of forums.
Jarod - I really appreciate your attention to detail (detailed pictures with specifics such as part numbers, where gotten, any other pertinent information) - it certainly helps prevent guys like me from clogging up the forum with a bunch of detail questions. The beauty of this whole project is that it will improve the bird immensly without significant cost - actually, it will reduce the overall cost of getting the TREX airborne and fly to it's fullest potential yet!!! Will only be labor intensive and not pocket book intensive. This motor you guys are dicussing really has me excited!! I've been wanting to do something like this for some time, but never had a reason to pursue - Do now though!!
Suggestion: With this project and exact build details/pictures to follow - Bear in mind, many of us have never built an electric motor of any kind............... You folks may want to have a seperate spot for building these motors ie - the do's and don'ts, best way to build (shortcuts or things that can make this motor a better investment, winding do's/don'ts (even down to how to wind these babies!!) ect. - You guys get the picture. Besides, I also see other opportunities for these motors to be used elsewhere within our hobby.
Sincere thanks to all!!!

Best Regards,

Todd Walters
Leetonia, Ohio
01-11-2005 11:44 PM
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johnny b
Senior Heliman
Location: Central Coast, CA

My Posts This: Topic  Forum		One thing to consider, is there are off-the-shelf motors that appear on the surface to be close to the specs of that hand-wound motor, for those of us who don't want to bother winding motors. Again, given the drop in weight, a 16oz Trex is right in the upper-weight band given for the Maxir, which is built specifically around the Axi 2208/20 motor, so at least initially, the Axi would seem to be a good choice of motor. It weighs more, but at 1.5oz, not hideously more, plus the Axi's are known for great build quality, power, and longjevity. If someone could verify this as a good choice, and recommend a proper pinion ratio for it, this would probably be a good choice for people looking for more of a "plug and play" component.

Again, off my fuzzy math, the thing I come up with, is the weight drop is in majority due to using much lighter components all-around. As such, this is a LESS EXPENSIVE version of the Trex, but one that will hopefully prove to be more agile and have longer run times due to lower weight.
01-12-2005 12:36 AM
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24 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ]36700 viewsTOPIC CLOSED
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e-Align T-REX 250-450-500-600 > Are you ready for this? 464gram T-Rex w/ 20 min fly times on a 1200mAH
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