A-10 Warthog Balsa Design and Build: 1/11th Scale - Page 4 - RC Groups
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Jan 30, 2013, 01:20 AM
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Dirty Dee's Avatar
Fixed up the two-seater a bit. Gotta say that one is starting to grow on me.

The hotswap idea could possibly work without doing major changes to what I have currently. I think I have something in mind as to how to implement it.

Still a bit of a ways of from getting a decent number, but I'm thinking this will have somewhere around a 10-15lbs AUW. Not sure what battery setup, and whether to go for 6S or 8S for the 12 blade changesuns. Have a bit of reading to do in the thread.
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Jan 30, 2013, 03:20 AM
was geht , müssen unten kommen
Keenan smith's Avatar
If your going 6s in the cs 90 then go for a 1500kv motor and 110A esc, if your going 8s then go 1350kv with a 150a Esc

K
Jan 31, 2013, 07:05 AM
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Still a bit of a ways of from getting a decent number, but I'm thinking this will have somewhere around a 10-15lbs AUW. Not sure what battery setup, and whether to go for 6S or 8S for the 12 blade changesuns. Have a bit of reading to do in the thread.[/QUOTE]

How about this set up, RC Lander 12 blade fan 1000kv motor can be run on 8
9 or 10 cells, impressive thrust 3.6 kg to 4.6kg. Would be worth looking at, will be putting one of these in my Fly Fly F-100.
Feb 01, 2013, 02:22 AM
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LuvEvolution7's Avatar
the fans seem good. probably cheaper through Hobby King.

the twin seater just oozes cool. I gotta have one, some day.
Feb 01, 2013, 01:37 PM
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meerkat13's Avatar
Hi Dirty Dee,

I just wanted to say that this is some seriously good CAD / design work!

Keep up the great work
Feb 01, 2013, 02:10 PM
Do it Right, the first time!
CoolerByTheLake's Avatar
Quote:
Originally Posted by Keenan smith
If your going 6s in the cs 90 then go for a 1500kv motor and 110A esc, if your going 8s then go 1350kv with a 150a Esc

K
A 150A ESC?? Over kill, isn't it? Look at the numers on this set-up.


Re: HET 700-68-1680 /JetFan 90
--------------------------------------------------------------------------------
I'm using 1,5 year old Turnigy Nanotech 4s5000 (45c/90c) 2x.
This setup pulls about 110amps at 3,25KW.
It's hard to say how much thrust it generates.
Inflight the Jetfan produces visibly more then shown in the graphs of ejets. I experience similar in my Habu.
A HET 700-68-1500 on 8s would be enough for good flight performance but for grass takeoff more power is welcome.
The setup perfoms fine but my next setup would be
10s4500 on HET 700-68-1200.

Grtz,
Emile
Feb 01, 2013, 09:18 PM
was geht , müssen unten kommen
Keenan smith's Avatar
The CS90 is an Amp Hog!
Feb 02, 2013, 01:52 AM
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LuvEvolution7's Avatar
as are all multi blade fans. if you want efficient, you go with less blades. if you want good sound, you sacrifice Amps for sound. just the nature of the beast. in a plane like this, I'll sacrifice Amps for a cool sound.
Mar 03, 2013, 03:12 PM
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Dirty Dee's Avatar
Got back to working on the model. fuselage is mostly complete. added servo pockets to the elevators and rudders.fixed up the canopy since what i had before would cause issues when vacuum forming. the canopy will be pulled twice. the first pull will be the canopy portion. then the excess plastic will be trimmed, put back on the mold, and then pulled again. the second pull will be trimmed to be the canopy framing.


Still need to mess around with rib layout and possibly changing some out to balsa since it looks like this is going to be on the heavy side, maybe closer to 12lbs AUW.
Mar 19, 2013, 01:22 AM
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Dirty Dee's Avatar
small update.

Been working on not having this so overbuilt and trying to lower the weight. managed to get it down about 1 3/4 lbs so far. Closer to ~10lbs AUW now.

Playing around with the retracts and I'm deciding that I'm going to go with the Robart 510RS air up/spring down set. This will give me some wiggle room and be able to install blocks to restrict the movements as it retracts up. The nose gear bay is pretty tight.

also made a Nanotech 6S 5000mAH battery to see how it fits in the bay.
Mar 19, 2013, 07:07 AM
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meerkat13's Avatar
Nice work and well done on the weight saving... it doesn't half add up!

Looking forward to your next update.

Steve
Mar 19, 2013, 04:31 PM
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Looks great. What's left for you to do before you start cutting?
Mar 20, 2013, 12:39 AM
Tijuana Mexico
Mig29's Avatar

Looks perfect


I like your design my design is still in the work any tips I will appreciate.
Last edited by Mig29; Mar 20, 2013 at 12:45 AM.
Mar 20, 2013, 02:59 AM
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darook's Avatar
Quote:
Originally Posted by Mig29
I like your design my design is still in the work any tips I will appreciate.
Nice!! What are you using? CAD, Sketchup?

I used sketchup for my beaver build but would like something more cad oriented. Anything that does not cost loads you guys could recommend?
Mar 20, 2013, 01:30 PM
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Dirty Dee's Avatar
Quote:
Originally Posted by FOShowNoClass
Looks great. What's left for you to do before you start cutting?
Vertical and horizontal stabs are 99% with only some minor tweaks needed prior to nesting for cutting. I was debating making the horizontal stab removable to aid in rewiring if a servo went bad in the tail. may just use some rolled paper for conduits and run some pull cable prior to sheeting and glassing. Need to keep weight down.

Quote:
Originally Posted by Mig29
I like your design my design is still in the work any tips I will appreciate.
Hey Mig. I remember following your original A-10 build thread. from what it looked like, you sketched all the ribs and formers individually. What I would suggest is make a solid/surface model of the plane, and then use intersection planes to get the outlines. Lots of threads and videos made showing this approach (I think D_Fast has a video of his workflow).

here is a good solidworks-specific thread going from start to finish:
https://www.rcgroups.com/forums/show....php?t=1227712


darook, maybe you can check out Alibre Design:
http://www.alibre.com/products/hobby/
Last edited by Dirty Dee; Jan 06, 2014 at 05:02 PM.


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