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Oct 04, 2012, 02:19 PM
Registered User
Quote:
Originally Posted by foam freak
Wasn't too impressed with performance on stock 12x6 prop with a Nanotech 3000 4Cell 35C . Threw on an APC 12x8 which made a big difference with no increase in amps/watts. It now has unlimited vertical and can even easily hold a knife edge on full throws. I love this plane, out of the 8 Dynam planes I own, this is my favorite.

12x6 Dynam stock prop - 31 amps/450 watts
12x8 APC - 30 amps/445 watts

I will test an APC 13x6 prop when it arrives.
Was that the 12x8E prop??
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Oct 04, 2012, 03:28 PM
Registered User
Gator Hawk's Avatar

ESC Problem


I got mine from Grayson Hobby and have just completed the assembly. During final checkout I found the ESC is not working properly (motor cuts in at out at high throttle position). Unfortunately, I modified the ESC before testing it (it came with a Dean's connector which I changed to an HXT 4mm to mate with the batteries I have from HobbyPartz). Any thoughts on how I can fix this problem? I have a program card that should work with this ESC and I am using an Airtronics RDS 8000 radio system.

Thanks, Tim
Oct 04, 2012, 03:29 PM
Corona, CA
P 51 Jockey's Avatar
Adding a little pitch helps performance a lot but doesn't raise amp draw much, especially with a 2 blade prop. Adding more diameter raises amps much faster.

FWIW, I use a 4240 750KVA motor with a 12-8 3 blade MAS, powered with a 4cell 3300mah, 30c. My static draw is 42A @ 600watts ish. (going off memory) I can fly for an easy 7 minutes and it hauls butt if I want it to. I end up flying at half throttle most of the time and chop the throttle completely on dives.

A 3000mah will fit with no foam carving needed. I had to slightly trim one side of the battery bay to fit my 3300's. I like the CG with the battery sitting in the middle of that area. I didn't like it all the way foreward even with a 2800 4C.

The ESC slides right out after you pull the front cowl off. It's just held on with magnets, but for once the magnets actually work! Just be firm and wiggle it off.
Oct 04, 2012, 03:33 PM
Corona, CA
P 51 Jockey's Avatar
Quote:
Originally Posted by Gator Hawk
I got mine from Grayson Hobby and have just completed the assembly. During final checkout I found the ESC is not working properly (motor cuts in at out at high throttle position). Unfortunately, I modified the ESC before testing it (it came with a Dean's connector which I changed to an HXT 4mm to mate with the batteries I have from HobbyPartz). Any thoughts on how I can fix this problem? I have a program card that should work with this ESC and I am using an Airtronics RDS 8000 radio system.

Thanks, Tim
Probably just have to raise the timing. If your programmer doesn't work, the instructions for Detrum ESC's are at Hobby Partz web site to do it the old way. (throttle stick)
Oct 04, 2012, 10:19 PM
Registered User
poziovahim's Avatar
Quote:
Originally Posted by w4yn
Have you taped hinges? That is the only mod that seems necessary from initial look over.
Assume you had to do some trimming to get 5s pack in!
I am more interest in scale flight so 4S will probably be fine.
Any experience with Sky Blue packs??

Tim
Yeaah man!
I taped the tail feathers and only had to rasp out a tad of the battery box ceiling and of course turn her into a single-seater with a cover over the hatch where the front wind screen was. I think she's a lot prettier now
Dan
Oct 04, 2012, 10:22 PM
Registered User
poziovahim's Avatar
Quote:
Originally Posted by foam freak
Wasn't too impressed with performance on stock 12x6 prop with a Nanotech 3000 4Cell 35C . Threw on an APC 12x8 which made a big difference with no increase in amps/watts. It now has unlimited vertical and can even easily hold a knife edge on full throws. I love this plane, out of the 8 Dynam planes I own, this is my favorite.

12x6 Dynam stock prop - 31 amps/450 watts
12x8 APC - 30 amps/445 watts

I will test an APC 13x6 prop when it arrives.
Good stuff, Thanx
Oct 04, 2012, 10:40 PM
Registered User
Is anyone's Waco that's balanced properly of course, taking any up elevator trim to fly straight and level? Or is everyone's elevator pretty much neutral with the plane trimmed for straight and level flight?
Thanks
Oct 05, 2012, 07:51 AM
Registered User
Quote:
Originally Posted by poziovahim
Yeaah man!
I taped the tail feathers and only had to rasp out a tad of the battery box ceiling and of course turn her into a single-seater with a cover over the hatch where the front wind screen was. I think she's a lot prettier now
Dan
Photo please
Thank you
Ken Smith
Oct 05, 2012, 08:16 AM
Registered User
Quote:
Originally Posted by w4yn
Have you taped hinges? That is the only mod that seems necessary from initial look over.
Assume you had to do some trimming to get 5s pack in!
I am more interest in scale flight so 4S will probably be fine.
Any experience with Sky Blue packs??

Tim
Here are some thoughts on Sky Lipos,
https://www.rcgroups.com/forums/show...y+lipo+reliabl

Ken
Oct 05, 2012, 08:45 AM
Registered User
Quote:
Originally Posted by e-flight-Ken
Here are some thoughts on Sky Lipos,
https://www.rcgroups.com/forums/show...y+lipo+reliabl

Ken
Wow, not good I would say and I just ordered 2 4S 2700ma packs for my new Waco!

Tim
Oct 05, 2012, 11:16 AM
Corona, CA
P 51 Jockey's Avatar
The C ratings are conservative, but I use Gen's Ace. No puffing, German made in a climate controlled facility (important to prevent puffing) and the most consistent of all brands I own. (Turnigy, sky lipo, nanotech)

BTW, I was told that charging a pack at 1c immediately after use will help cool it faster and lessen wear and tear on the cells. Anybody else hear of this?
Oct 05, 2012, 02:22 PM
Registered User
krazyman's Avatar
Quote:
Originally Posted by Scott Morgan
Is anyone's Waco that's balanced properly of course, taking any up elevator trim to fly straight and level? Or is everyone's elevator pretty much neutral with the plane trimmed for straight and level flight?
Thanks
I balance mine at 78mm and still have to give it up elev to fly straight and level. I think it has more to do with the AOA of the top wing which is negative to the bottom wing. I hope this makes sense.

Terry
Oct 05, 2012, 05:29 PM
Registered User
Quote:
Originally Posted by P 51 Jockey
The C ratings are conservative, but I use Gen's Ace. No puffing, German made in a climate controlled facility (important to prevent puffing) .......... (Turnigy, sky lipo, nanotech)

BTW, I was told that charging a pack at 1c immediately after use will help cool it faster and lessen wear and tear on the cells. Anybody else hear of this?
I'm not so sure about that German factory since it is in Shenzhen (China).

http://www.rc-battery.com./app/menu.php?op=index

Cheers,
Ken
Oct 05, 2012, 07:27 PM
Go 4th Air Force
pmacko's Avatar
Can anyone tell me what size screws to use to attach the control horns to the control surfaces? I don't see it in the instructions. Thanks in advance

Paul
Last edited by pmacko; Oct 06, 2012 at 10:25 AM. Reason: incomplete
Oct 05, 2012, 08:16 PM
Registered User
Mine is balanced at published CG and flies straight with elevator neutral.


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