RunRyder RC
 5  Topic Subscribe
WATCH
 1 page 1720 views
Helicopter
e-
Century Radikal E640 - Swift 16 NX
› My home made upgrades
11-29-2005 05:38 AM  12 years agoPost 1
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

first I built an aluminum Z bar, you know the one that breaks all the time.

It turned out OK so I tried a belt drive gearbox.

Also I bent the blade grips so I could use ball links.

The landing gear is of a V1 humer, its an X10 frame cut to fit with 7mm carbon graphite for the skids and the tail boom.

Thanks for looking and fill free to post comments or ask questions

PM  EMAIL  GALLERY  Attn:RR  Quote
11-29-2005 07:33 AM  12 years agoPost 2
rcworm

rrNovice

Ontario Canada

My Posts: All  Forum  Topic

Nice work!

Do you want to sell me a metal Z bar?

ian.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-29-2005 07:23 PM  12 years agoPost 3
zoom

rrElite Veteran

Galveston, Texas

My Posts: All  Forum  Topic

Awesome!

I may have to look into that Z bar as well.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

PM  EMAIL  GALLERY  Attn:RR  Quote
11-29-2005 07:39 PM  12 years agoPost 4
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

I could make more but would like to get a 2mm tap first, I had to use a screw with a cut in the side to tap the threads.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 07:46 AM  12 years agoPost 5
Rob_T

rrElite Veteran

..

My Posts: All  Forum  Topic

Dont just buy 1! Unless you use a tapping jig those 2mm taps dont last long. When you do break off the end in your work, you can salvage the part using modelling pins and pliers to make an improvised tap extractor! (Been there and done that a few times now...)

In the US you'll find #2-56 taps are cheaper than M2, and while they're not interchangeable the screws are about the same size

PM  EMAIL  Attn:RR  Quote
11-30-2005 01:29 PM  12 years agoPost 6
upperking

rrApprentice

Spring Hill, Florida

My Posts: All  Forum  Topic

Hey I want that zbar also..

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
11-30-2005 03:48 PM  12 years agoPost 7
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

looks like I have to set up a few jigs so I make some Z bars.
Also I flew my 3d Pro last knite with 315MM blades, bome is 2.2" longer with a 435tooth belt and went to a 13tooth pinon on my 400df.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 04:23 PM  12 years agoPost 8
zoom

rrElite Veteran

Galveston, Texas

My Posts: All  Forum  Topic

Love2fly,

How well does it fly? If you have an extra 435T belt let me know.

315mm blades is a lot to ask from the 400DF(3000kv) IMO as I have tried it on my Trex. I was thinking of going to a 450TH (3000kv) if need be.

My Trex only achieved 2200 rpm w/ the 1T pinion swinging the stock 305s. Now let me say at that time, I was only using a little 3s 740mah Kokam, so it would be unfair to say what would happen without testing the motor with a larger, more capable pack.

Stretching the kit out with the longer blades and the heli weighing less than 500g AUW, the 400DF may be fine even with the 13T pinion. But before I give my final verdict, I need to fully test out all of these setups.


Here is the video of the 400DF in the TRex w/ 305mm stock woodies:
http://www.runryder.com/helicopter/.../Trex_400DF.zip


.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 07:10 PM  12 years agoPost 9
Bryan R

rrApprentice

Calgary, Alberta

My Posts: All  Forum  Topic

looks really nice !!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 07:28 PM  12 years agoPost 10
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

Zoom, yes I have 3 extra belts $5 each also 2 booms cut 2.2" longer that I'll sell, belt and boom for $9. First come first serve.
Took Stretch out side to see how it would do.
400DF 13tooth pin, ran 2200 @ 0deg and 1800 @ -10deg
I ran 2 packs (Electric Power 1800mah 3s 8c continuous 15c burst) for 10 min each.
Ran 1st pack in normal mode just to see how it handled and clime-out.
ran 2nd pack in idle up and also checked head speed.
IMO power about like himax 4100 as far as clime out go's.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 10:08 PM  12 years agoPost 11
zoom

rrElite Veteran

Galveston, Texas

My Posts: All  Forum  Topic

Love2fly,

I posted data on the 400DF spinning 305s months ago, and it appears that you have come up with very similar numbers. This tells me that the 400DF is not the ultimate motor for use for the stretched kit, as it is not the motor to use for a Trex.

Previous data comparing the 400DF (3000kv) vs. 450TH (3000kv) :

....The following are results to the 400DF (3000kv) in the T-Rex
I wanted to see how well the 400DF would do in my TRex w/ the same 13T pinion as on my 450TH, and since both of these motors have the same kv.

MOTOR: 400DF Brushless w/ 740mah 20C Kokam Battery

Heli Tests TREX

Idle UP mode:
Weight: AUW 579g
Pitch: -------------------0
Pinion: 13T
Amps :-----------------13.2
Head Speed: 2220rpm max

At_____ -10 deg pitch
19.2 max amp draw
1920 rpm Max HS

Normal mode 50% in a hover +7 deg pitch

The 400DF drew 6.3 amps @ 1440 rpm head speed
Video Coming:

Impression:

Despite the same kv, power source and pinion, the achieve a similar hover HS @ 50% thr (1350rpm (450TH) vs. 1440rpm (400DF) ), the 400DF could not reach the same maximum expected HS of the TH's ~2640 rpm. It only produced 2220rpm. However, what is interesting is that of the 2220 max HS @ 0 deg pitch, this motor's HS only dropped by 300rpm, vs. the 450TH's 440rpm. The only thing I can offer to explain this is the the Kokam was being choked off with the micro deans connectors once I asked for than the 20 max amps (2X10 amp connector pin rating) it supplies. I plan to retest with 40 amp ultra dean connectors as well as run the K 740s in parallel as a 3s2p 1480 setup as well as with my CC 35 which just arrived today....


Lets all face it. That is really what we are turning our hummers into when we stretch it out, "Lighter versions of the T-Rex".

Now the 400DF is totally rocks when it comes to spinning 255s, but I think its limt may be arond the 272-280mm range. I will have to prove that though.

Justgofly sells the 450TH which is an ideal motor for the T-Rex. I will just have to see if it will fit on the 3D Pro's mount.

The whole idea about stretching the 3D Pro out was to be able to swing cheap T-Rex CF and wood blades. This would have improved the amount of lift as well as allowed us to run a larger battery for increased flight time.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 10:15 PM  12 years agoPost 12
zoom

rrElite Veteran

Galveston, Texas

My Posts: All  Forum  Topic

Continued:

Love2fly. I'll bet if you go back to your 255s:

1. your headspeed will increase to ~2600rpm w/ that 13T (which is where it should be for that sized pinion)

2. The lift may actually improve since the motor is nolonger over burdened.

3. I know it defeats the purpose in stretching it, if you have to get a different motor as well as electronics.

It would be interesting to see what the DF will do with the 280s since the kit is already stretched???

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2005 11:07 PM  12 years agoPost 13
pencil shavings

rrNovice

fairport, ny

My Posts: All  Forum  Topic

what about shogun carbons @272mm's and maybe even dropping a tooth on the pinon to let the motor unload a bit more?

PM  EMAIL  Attn:RR  Quote
12-01-2005 01:06 PM  12 years agoPost 14
zoom

rrElite Veteran

Galveston, Texas

My Posts: All  Forum  Topic

The 272s may be fine even with the 15T. Its just that spinning the 305s is asking alot of the 400DF.

The DF does a pretty good job of holding its headspeed, but the question is whether it is reaching its optimal HS.

A 15T should yield ~ 3000rpm; 14T ~ 2800, and 13T ~ 2600.

Whatever blade length allows the motor to reach these numbers will be fine. I do know the 255s barely taps its power. So, the quest is to find the 400DF's optimal blade length.

Other variables include:
using ultra deans instead of micro deans, blade thickness (like 90s woodies are ~5mm thick which draws unnecessary power, etc.)

The optimal blade length is somewhere between 255-305mm

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

PM  EMAIL  GALLERY  Attn:RR  Quote
12-02-2005 06:21 AM  12 years agoPost 15
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

I have been thinking about making Zbars and don't like my design, I used flat stock and a thin washer on the sides to act as thrust plate. Idid not think i would need them but i saw there was some binding.
Bling is nice but I wont my Pro to fly good and not brake over the smallest bump and those swash sets ar not cheep.
Any how I don't have a mill or a lathe so its hand built and polished, it only took about 2 hours to make and could make more but i'm not going to sell junk just to make money
I think a beefy plastic would work good not all that bling but easy to shape. I could make 3 or 4 jigs and knock out some plastic parts.
Now the tail box is a good part and I would make some If anyone would like one let me know. Thanks

PM  EMAIL  GALLERY  Attn:RR  Quote
01-01-2006 08:50 PM  11 years agoPost 16
rcworm

rrNovice

Ontario Canada

My Posts: All  Forum  Topic

Hi love2fly

How is the progress on the metal "Z" bar for the 3D pro see saw? I just broke another and I'm getting tired of ordering the entire assembly just to get the z bar.

I asked Century whether they would consider selling the "Z" bar separately. I have noticed that they sell the head axels (CNE201A) and tail booms separtely (CNE316A). No sense buying sets just to get one part.

Anyway Happy New Year!
ian

PM  EMAIL  GALLERY  Attn:RR  Quote
01-09-2006 10:17 PM  11 years agoPost 17
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

PM  EMAIL  GALLERY  Attn:RR  Quote
01-09-2006 10:26 PM  11 years agoPost 18
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic


this part is hand made out of plastic, about 4 hours to make and 4 grams, works like a champ.
I also made some landing gear.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-09-2006 10:28 PM  11 years agoPost 19
love2fly

rrApprentice

McMinnville Oregon USA

My Posts: All  Forum  Topic

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1720 views
Helicopter
e-
Century Radikal E640 - Swift 16 NX
› My home made upgrades
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Monday, December 18 - 10:32 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online