RE: U-Can-Do 3D EP Anyone seen it yet?  
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All Forums >> Electric Aircraft Universe >> 3D Electric Flying! >> RE: U-Can-Do 3D EP Anyone seen it yet?
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RE: U-Can-Do 3D EP Anyone seen it yet? - 7/13/2005 8:16:40 PM   
aflipz


 

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I feel it is my responsability towards Great Planes to inform you that they have responded to my email and that they are promising a very favorable solution. They say they are aware of problems with some of those esc's.

I must however hold back my praise until i have recieved this ''solution'' Hint; a different brand esc is supposed to be on it's way to my house. The letters ''cc'' are the only hint i'll give you

(in reply to aflipz)
       Post #: 226

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/13/2005 8:21:17 PM   
TManiaci



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From: Temecula, CA, USA
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Oh, and nice Phoenix is a replacement part, cool! You getting anything else? Like a new plane?

_____________________________

TMan

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       Post #: 227

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/14/2005 4:48:54 AM   
aflipz


 

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yeah castle creations rock! I have a mamba25 esc with a cm-8000 motor. The mamba is essentially a phoenix 25 with different software for cars and trucks, everything is programmable; brakes, timing, start mode, even reverse on/of, or reverse type! (delay or smart) All of their brushless esc's can use the phoenix link usb cable for more programming options + firmware updates. (i asked, you can't flash a mamba to become a phoenix, and vice versa at least that's what they said) Believe me, the high temp cutoff works on cc's, so do the lvc's and everything else that is supposed to be there, the mamba takes so much abuse, being in a truck is very different than driving a prop, you can prop your plane and be pretty sure it won't draw more amps than static wot, Trucks however have gearing BUT vary in weight, can run in tall grass and snow causing resistance etc... it's really easy to exceed power demands in rc cars and this thing has all the fail-safe's for it to survive the worst kind of abuse. I kick myself for not getting a phoenix25 in the first place!

i got a tracking number and everything, they actually shipped it out, they say it should take about 10 days to get here. I didn't ask what exactly they were going to send, they just said they'd replace it with a castle creations, i am assuming phoenix 10 a phoenix 25 would be awesome though.

I told them i wanted a new plane cause mine was F@#$%d up but they didn't mention anything about that in their response. Immagine if manufacturers could be held responsible to such an extent! Their warranty states quite clearly that they cannot be held responsible beyond replacing the esc itself... I did send them pics of everything, the gp plane, gp motor and gp esc, who knows maybe they'll take it to another level due to my ''loyalty'' but i wouldn't hold my breath. Replacing that crappy esc with a better one is allready a nice gesture on their behalf. Would sure be nice to receive a test prototype of their upcoming epp arf 3d plane, ok i'm dreaming now...

In another dream, I wish nissan would trade my 02 se-r spec v for an 04, after all, it only has 25000 miles on it and has had 2 engine replacements because of a widespread known issue allready, then they voided my warranty because i have a sport tuned exhaust system. They did this because they know their 2.5 engines are crap and will not last till warranty coverage end. Oh, yeah.. it's in the shop as we speak, their is a problem with the ballancer shaft assembly drive chain and say it's not covered because i have an exhaust header. That's like me telling you your house's roof is no longer covered because you drive a toyota... Just about as closely linked, mechanically speaking. By the way, i put the header there because the engine failures are caused by the pre-catalytic converter on the stock manifold that sometimes desintegrate, get sucked into the engine in certain (normal) operating conditions and scratch the cylinder walls, causing premature wear and oil comsumption, in my case followed by a large BANG sound coming from the engine bay. The first time i thought it was funny and i kept peices of the number 4 piston as a souvenir (they are the size of baby teeth) Now i am finding it harder to laugh at the situation.

Is this what you'd call ''off topic'' ?

(in reply to TManiaci)
       Post #: 228

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/15/2005 3:36:20 AM   
4 stroken ron



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I flew mine for the first time tonight. I can't say it is a good airplne but maybe it will grow on me. I have a stock motor and am running a 11.1v 1500 mil LIPO. Low rates seem too low and high rates seem too high. I can sort that out. I first landing was a little hard and broke a tooth off the nylon gear, now the gear train is noisy. Are these interchangable with GWS 350 gears?
Second landing was even harder and the battery poped out the side. I can fix that. How do you guys get tape to stick to this thing? I tried stripping tape and it won't stick? I can't even get the velcro that was included in the kit to stick to it. I have a roll of the clear Duct Tape, I haven't tried it yet, will it stick?
I guess I need MORE POWER.
Ron

(in reply to aflipz)
       Post #: 229

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/15/2005 5:21:37 AM   
TManiaci



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From: Temecula, CA, USA
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Ron,

I can't find anything that sticks really well either. What I did discover was that if you "paint" the inside of the zipper area with foam safe CA, then hit it with spray kicker, it thins, spreads and hardens, yet it remains real flexible. Seems to make the surface pretty tough.

After seeing that work, I'm thinking a sheet of fiberglass cloth painted with CA would make it bulletproof, and keep it light too. I think you could lay in a well fit piece on each side, wet it with CA and brush it flat, spray on kicker and BAM, instant kevlar battery proof walls. Might be a good way to make the front-end real strong too, ugly, but strong I bet the velcro will stick to that better too...

_____________________________

TMan

(in reply to 4 stroken ron)
       Post #: 230

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/15/2005 7:57:09 PM   
4 stroken ron



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The clear Duct Tape seems to stick. All fortified and ready to try again.
Ron

(in reply to TManiaci)
       Post #: 231

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 2:28:58 AM   
TManiaci



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From: Temecula, CA, USA
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All,

Finally go to load-test the new COOL S 4200 Brushless 5:1 gearbox rig from Dymond with various props and batteries.

Had to make an adapter to put APC Slow-fly props on the hex-nut hub for GWS props. Just cut a hub out of a GWS prop with the hex pockets, then chuck it up with a spare gearbox shaft in the drillpress. Used the Dremel to take it down close to 0.312 dia, then finish with a file to precise in the APC prop hubs. Then cut it in two, getting two adapters out of one hub. Works REALLY well... and now we have a wide selection of props (APC), where GWS and E-Flight has a VERY limited selection of pitch-diameter choices.

So, the results...


APC 9x6, TP1320 mAh, 12C, 16.8A, 154 Watts
APC 9x3.8, TP1320 mAh, 12C, 13.6A, 140 Watts

APC 9x3.8, Wattage 1500 mAh, 7C, 11.3A, 105 Watts

APC 9x3.8, Dymond 2000 mAh, 10C, 14.5A, 154 Watts

Battery Weights
TP1320, 3.25 oz
Wattage 1500, 3.70 oz
Dymond 2000, 5.3 oz


So, it was clear real fast the we hit the right prop with the 9x3.8 (second tried). Next step down is a 8x6, probably too small, so didn't try it. These were all fresh charged batteries, with starting no-load from voltage 12.32 to 12.44 V. We hit them WOT for about 3 seconds to see the current settle before the readings were recorded. Our target was to run the TP1320 near capacity (15 A) and still use the Wattage 1500 without severe overload (10.5 A capy).

This should pull this little bird really well. We'll fly tomorrow and report. It was pulling 26 oz's thrust @ 17Amps on the stock GWS 11x4.7. I'll try to get the thrust rig out and measure this setup later.

_____________________________

TMan

(in reply to 4 stroken ron)
       Post #: 232

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 3:37:19 AM   
4 stroken ron



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From: Grinnell , IA, USA
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WOW TMan, thats great. I guess I should order one of those motors.
I had my UCANDO out again tonight. The clear Duct tpae held things together real good. I turned up my low rates a little and got my Expo set at -50 (Futaba Super 8) Still using the stock motor. I liked it a lot. I am not really a 3D flyer. I like to think of myself as an "advanced" sport flyer. This little plane did everything I tried, and did it well. I bounced it off a fence post with only slight damage, the ground came up and hit me pretty good a couple times and the UCANDO still wanted more. I finally stripped the gear on the second pack. Grrrrrrrr..... Done till I get another motor, or a new gear. The stock motor, CC pixie 20P and Elactrifly 11.1v 1500 mil batery pack combo seems to be enough power to satisfy me for now, altough I do run with the throttle open furthur than I would like and so I get shorter flight times.
Anyway, I like Tmans' report on the COOL S 4200 I think I will order one.
In the mean time anyone have a spare gear they can send me? :-)
Ron

(in reply to TManiaci)
       Post #: 233

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 4:34:14 AM   
aflipz


 

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See, those loads are way too high for a 8-9amp esc, gp sold the bl8 wich is just that purposely for use with 4200 can motors or 1000kv outrunners that end up in the same ballpark power vs amp. Plus i am using cells capable of 21-25 amp continuous. No wonder it fried to oblivion. But hey if they say it's ''ideal'' and write prop suggestions on the package who is a noob like me to argue...

Still grounded, plane ready but no esc, i am not about to buy a 3rd one when i have 2 on the way from their respective manufacturers. Tman, that means if it's a cc10 i am going to wait for my eflite 20 before flying again and will sell the cc10 nib.

(in reply to 4 stroken ron)
       Post #: 234

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 4:35:27 AM   
TManiaci



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From: Temecula, CA, USA
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Just got a thrust reading.

TP1320
APC 9x3.8
Dymond COOL S 4200 Brushless w/ 5:1 gearbox
Dymond Sky Advantage BL 25 ESC w/ BEC

And the number is....

22 OZ's ! Yeahaaa. This thing will be nice and stong verticle now .

AUW is now 14.90 oz (accurate to 0.05 oz) with TP1320 onboard. We now have a 1.48:1 thrust to weight ratio.

_____________________________

TMan

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       Post #: 235

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 4:53:07 AM   
TManiaci



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aflipz,

I think that Phoenix-10 will be fine, the specs say it's good for 15 amp Surge. I would take that to mean you can push it 13-14 amps for short periods (3-5 seconds) without damage. Just use it when you need it, you should be fine IMHO.

See Phoenix-10 Specs here. I believe the CC's are under-rated, and will perform well above spec without much risk. I run my Jeti 8 amp at 13-14 amps all the time, so does my son in our twin E-Flight QQ Yak 54F's. My boy works it way harder than I do, not a problem yet with well over 100 HARD flights on the hardware. He really wrings it out, the little brat.

I do think you will need to set up for 13-14 amps to get "good" performance with this bird at 15 ozs. I wish I had thrust tested the stock gear before we fried the motor... I bet it's barely putting out 16-17 oz's thrust by the way it flew, and overloading the brushed 280 motor more than 20% at that.

_____________________________

TMan

(in reply to aflipz)
       Post #: 236

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 5:16:06 AM   
4 stroken ron



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From: Grinnell , IA, USA
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I did thrust measurements on the stock motor, when it was brand new, not broken in. Using a 11.1v 1500 mil 8c Electrifly battery.


GWS 11X4.7
Amps 10.8
Thrust 11.5 Oz.
Watts 110


APC 10X3.8
Amps 8.0
Thrust 10.8 Oz.
Watts 81


Seems the COOL S is wayyyyyyy better
Ron

(in reply to TManiaci)
       Post #: 237

RE: U-Can-Do 3D EP Anyone seen it yet? - 7/16/2005 8:35:58 AM   
aflipz


 

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From: Montreal, QC, CANADA
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The more i look at my plane the more i want something else. Perhaps the potensky cobra ep. it's relatively affordable in foam only package (all hardware, just no motor/gearbox) It looks stiffer, is much less ridiculous looking than the ucdep, has landing gear and the flight vids i've seen are quite convincing. It certainly doesn't look like it's performance is out of my reach And it's epp. i'm addicted to hot glue and shoe goo, what can i say! Repairing these things is so fast and easy once you get the hang of it, i'm hooked!

(in reply to 4 stroken ron)