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Author Topic: My Brodak Cardinal, converted to electric and flying  (Read 6477 times)

Offline Daniel_Munro

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My Brodak Cardinal, converted to electric and flying
« on: February 22, 2016, 02:42:54 AM »
Hi.

Here is a video of my Cardinal, converted to electric and flying. This plane is 10 years old and was originally powered by a Super Tigre 46. Now it runs an Emax GT2820 (985kv), Turnigy Trust 55A ESC, KR governor/timer, APC 11.5x5.5 prop and a 4S 3000mah battery. I am using about 2100mah so I plan on getting some smaller batteries soon. As it sits currently it weighs 49oz ready to fly.



I sure am enjoying electric. So consistent, quiet and clean. My only gripe is waiting on the fuel to get back in the tank.

But at least now I can focus on my flying and not if the engine will run right.

It is still a little rugged in places but I think I am definitely improving.

Any comments are most welcome.

Dan.
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Offline Jeff Traxler

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #1 on: February 22, 2016, 07:16:43 AM »
Hi Dan,Your reasons are exactly why I love my E-ships.My flying has improved so much that I have sworn off ARF's,BARF's(Broke and repaired/flying),and hand me downs and built my first "PAMPA" capable ship.The Electric Velvet is my first and can be seen here on All Amped Up.A charger/power supply and multi battery parallel board upgrade may fix your fueling woes.Trax
If you wanna sing the blues(Fly Stunt) you gotta pay your dues and "I know it don't come easy"

Offline john e. holliday

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #2 on: February 22, 2016, 10:14:25 AM »
Plane looks like you have a winner.   Do you not use a stooge?   Having worked in electronics I know glitches happen when least expected. 
John E. "DOC" Holliday
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Offline Daniel_Munro

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #3 on: February 22, 2016, 11:48:51 AM »
Plane looks like you have a winner.   Do you not use a stooge?   Having worked in electronics I know glitches happen when least expected. 

John, thanks for your comment, it's the best flying plane I've ever had.

Probably hard to see in he video, but it is held in a stooge. Just a simple block of wood held down with tent pegs and a pin I pull with a long rope.

Dan.
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Online Crist Rigotti

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #4 on: February 22, 2016, 01:23:21 PM »
Nice job Dan.
Crist
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Offline John Cralley

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #5 on: February 22, 2016, 07:28:58 PM »
Welcome to electric control line Dan! I've been flying e control line since 2006 and I can't say it has improved my flying but then I'm hopeless in that regard! What electric C/L has done is make the hobby much more enjoyable! No sticky mess, starts at the touch of the button, completely predictable motor run and low noise level! There is a learning curve and an initial cost but after that smooth sailing!
John Cralley
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Offline Target

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #6 on: February 23, 2016, 09:36:58 PM »
Looks awesome!
I wonder if the same motor would work well for my planned E-Stiletto 660? I would think so, since it also was for a ST .46 originally.....
Great job on keeping it light, did you have to do anything to the conversion to not come out nose heavy? Did you add tail weight for CG?

Congrats!
Chris
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Chris
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Offline Daniel_Munro

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #7 on: February 23, 2016, 09:57:46 PM »
Looks awesome!
I wonder if the same motor would work well for my planned E-Stiletto 660? I would think so, since it also was for a ST .46 originally.....
Great job on keeping it light, did you have to do anything to the conversion to not come out nose heavy? Did you add tail weight for CG?

Congrats!
Chris

Hi Chris. I am definitely no expert on electrics just yet. But I suppose if your Stiletto is kept light it should work. I originally brought a Turnigy motor, but was too lower KV and too big. Maybe if Keith Renecle sees this he will chime in, he recommended the  Emax. Which come from Aliexpress and was only $27 USD.

The Cardinal with ST46, tongue muffler and fuel tank weighted 54oz so it was a weight gain of 5oz. I am going to get some Zippy Compact 4S 2700mah batteries which weigh 2oz less than the ones I am using now.

I simply attached the nose with my dremel and cut provisions for the battery and motor. CG come out only a few mm forward of where it was with before. The motor is light, the battery is heavier but closer to the CG so less of an effect I guess.

I am sold in electrics now. For competition planes I won't go back now.

NZL7396

Offline Target

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #8 on: February 23, 2016, 10:30:06 PM »
Thanks for the reply, Daniel.
59 oz isn't bad at all, but I thought I read you said it was FORTY-NINE ounces, and that is DAMN light!

I'll be able to specifically build the Stiletto for E power, so I will likely do some things for that mod, like notching out the LE of the wing so that the battery can be further back. Cant do much about the motor unless a system with a shaft and forward bearing is used (hmmm?), but the battery and such can be moved back pretty easy with new construction.

I have to say that I don't mind not cleaning my E plane, nor having to be a mechanic. The e planes are pretty sweet if you ask me. You could also, fly a plane before putting on a paint finish, and get it all tuned and dialed in, THEN spend the time painting it, and that's sweet too!

Congrats on the E success.

R,
Chris
Regards,
Chris
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Offline Daniel_Munro

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #9 on: February 23, 2016, 10:37:56 PM »
Thanks for the reply, Daniel.
59 oz isn't bad at all, but I thought I read you said it was FORTY-NINE ounces, and that is DAMN light!

I'll be able to specifically build the Stiletto for E power, so I will likely do some things for that mod, like notching out the LE of the wing so that the battery can be further back. Cant do much about the motor unless a system with a shaft and forward bearing is used (hmmm?), but the battery and such can be moved back pretty easy with new construction.

I have to say that I don't mind not cleaning my E plane, nor having to be a mechanic. The e planes are pretty sweet if you ask me. You could also, fly a plane before putting on a paint finish, and get it all tuned and dialed in, THEN spend the time painting it, and that's sweet too!

Congrats on the E success.

R,
Chris

Damn typos, it's been a long day at work. Original weight was 44oz not 54. Converted weight is 49oz but will be 47 when I get the Zippy batteries.
NZL7396

Offline Target

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #10 on: February 23, 2016, 11:07:17 PM »
Damn typo's indeed! Now I'm impressed. I think I can get my Oriental on a weight loss diet as well, though.
"She" is at 48 oz now, but I can easily and safely shed an ounce on the ESC, another 1-1.5oz on the battery (using only 1650mah of a 4s2500, plan to go to 2100 or so), and ditch the aluminum gear for some CF gear, or at the very least, drill some holes....And I have 3/4 oz of tail lead I might be able to ditch then?
Weight loss made easy.

I would think you might be able to safely go to a lighter ESC as well, since you are running the KR timer with it's cut out circuit....just a thought.

R,
Chris
PS. Get some rest!
Regards,
Chris
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Offline Keith Renecle

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #11 on: February 24, 2016, 10:26:29 AM »
Hi Chris,
The Stiletto is one of those all time great designs that I have often looked but never built. The 2820 motor is a little bit small for a .46/.50 size model. Last year I bought some of RSM's Black Tiger motors and one of them was the BT 3548C-900 Kv. It weighs 160 grams and is there not much heavier than the 2820. I was trying to lower the weight of my original Newtron but it was just too heavy for this motor and it go too hot. I was looking at Billy Werwage's USA-1 for this motor with it's lightweight I-Beam wing, but the Stiletto 660 should be ideal. These are really good motors and I'll be using a bigger Black Tiger 4250C-900 in my Newtron 2 for the Australian world champs in May. It should fly early next month and I'll post some pics if it comes out reasonably well.

To Daniel, thanks for posting the video, your set-up is working really well. I look forward to meeting you in April.

Keith R
Keith R

Offline Target

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #12 on: February 24, 2016, 02:51:14 PM »
Thanks Keith, I'll have a look at Eric's offerings for sure.
Vr,
Chris
Regards,
Chris
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Offline Motorman

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #13 on: February 25, 2016, 09:59:26 AM »
I use that same prop and mine doesn't buzz like that. What rpm are you using?


MM

Offline Daniel_Munro

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #14 on: February 25, 2016, 05:12:45 PM »
I use that same prop and mine doesn't buzz like that. What rpm are you using?


MM

Motorman, it's turning at 9400rpm. I started at 9200 and the buzzing was less pronounced.

The MVVS motor with a 12x6 APC in my other plane buzzes the same.

Both props are balanced perfectly, don't know why they do it.
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Offline Motorman

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #15 on: February 25, 2016, 08:46:48 PM »
Rpm and weight are about the same as me. The Cardinal is a bigger plane than mine maybe it's loading the prop more and giving you a little tip flutter. The other possibility is your motor hitting a frequency in that rpm range which might shorten bearing life. or maybe it's normal vibration rattling through your light weight airframe. It's a mystery.

MM 

Offline Mark Knoepfle

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #16 on: March 02, 2016, 06:44:49 PM »
Daniel - thank you for sharing. I've copied your set up, hardware wise, and will see what I can do with it.

Mark

Offline Target

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Re: My Brodak Cardinal, converted to electric and flying
« Reply #17 on: March 03, 2016, 07:44:56 PM »
If I don't go with the Black Tiger 3548 from Eric, the Emax GT2826/05 looks like it would work for the Stiletto 660.
It should work for @ 55-65 oz plane, I would think.
http://www.headsuphobby.com/Emax-GT2826-05-860kv-Outrunner-Brushless-Motor-F-301.htm
R,
Chris
Regards,
Chris
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