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Old Jun 21, 2010, 12:10 PM
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Auburn, WA
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Wow, the BD-5 Dilemma and the Sigma-5 are almost identical. Interesting.
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Old Jun 21, 2010, 10:09 PM
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Livermore, CA
Joined Sep 2004
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Quote:
Originally Posted by RobinBennett View Post
It would be easier to balance if you swept the wing a little, but the long nose should do the job...

Are you going to hot wire cut the wings?
I had cut out a few wings with a MiniMag airfoil, a while ago. I have one left in 1.9lb EPP, plus I have a couple 10g motor/esc's out of planes I just sold I can use.
I used sweep to get the C/G right on almost all of my other boomer designs, but I'm trying to keep the build as simple/light as possible and a C/F spar stright across the wingspan seems to works the best.
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Old Jun 25, 2010, 04:18 AM
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Livermore, CA
Joined Sep 2004
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Incase anyone wants a Boomer-Lite, I put one up for sale cheap;

http://www.rcgroups.com/forums/showthread.php?t=1265533
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Old Jul 22, 2010, 10:06 PM
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LittleG's Avatar
Raleigh, NC
Joined Jan 2007
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Sidekick FV Twin Boom with keychain camera

Just wanted to share my latest twin boom plane inspired by Aleg's Sidekick. For those interested, here's the link to its build log.

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Old Jul 24, 2010, 05:01 PM
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Auburn, WA
Joined Nov 2005
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That's cool! How does she fly?
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Old Feb 05, 2011, 02:40 PM
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Livermore, CA
Joined Sep 2004
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I still have another Boomer design I'd like to build some day, but I still have several of them I'm still flying.
I took out the 26" wingspan, 4ozs, 10g outrunner powered Boomer today.
It was just breezy when I got there, but in no time, the wind really picked up. One ot the guys had a wind/meter that showed 14-15, gusting to 18mph at ground level.
I flew some other planes and after a couple crashes, the guys started to pack it up.

I thought, I wonder if this little 4oz Boomer could cut this wind, so I went out closer to the middle of the grass field and launched it. It was a bit twitchy with the gusts and sheer, but totaly flyable. I had it about 70-80% power and had to max it a couple times to fight the gusts.
But for a 4oz, 10g outrunner power plane, it did just fine.
A couple of the other guys had there standard WildWing Boomers and they had no problems as well.
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Old Feb 06, 2011, 04:33 PM
SUPERB RC CRASH MASTER
rc crashburn's Avatar
Houston, Texas USA
Joined Aug 2004
987 Posts
Howdy Butch, is there a video on the little 4 oz. little feller?
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Old Feb 07, 2011, 12:36 PM
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Auburn, WA
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Yeah, I've flown the micro boomer you sold me in winds like that. Squirrelly, but fun.
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Old Feb 07, 2011, 09:14 PM
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Livermore, CA
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Quote:
Originally Posted by rc crashburn View Post
Howdy Butch, is there a video on the little 4 oz. little feller?
Sorry, I haven't realy got into videos yet.
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Old Feb 26, 2011, 08:32 PM
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Livermore, CA
Joined Sep 2004
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I've been wanting to build a simple Boomer type with a 10g outrunner.
I designed the Boomers, because I wanted a more stable, slower speed pusher, like a Flying Wing.
I've built several smaller EPP planes inc a few Boomers, to fly in smaller areas.
The Flying Wings are ok, but are usually pitch sensitive and fly better, faster.

So I figured that a 28" Flying Wing with a rear and front extended wing area would help stablize the pitch some.
Also to keep it simple to build, I desided to use a KLm type 2 wing.
The fuselage will be Boomer type with forward wing strakes like the F-18.
I've got some extra 9mm EPP, so I'll use that and depron elevons.
I'll run a 10g outrunner, 6x3 prop, 6g ESC, Berg 4l, 2 6g servos and a 360mah 2 cell.
So far this is what I got;
Butch
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Old Feb 26, 2011, 09:20 PM
I'm overcoming gravity!
Murman's Avatar
USA, NC, Huntersville
Joined Jul 2008
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Quote:
Originally Posted by Butch777 View Post
...The Flying Wings are ok, but are usually pitch sensitive and fly better, faster.
Butch, have you seen the Divinity thread? That flying wing uses a KFm4 airfoil and will fly extremely slow without needing the booms.
I'm looking forward to the results of your latest project though. I have an 1811 2000kv motor that needs a home.
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Old Mar 09, 2011, 01:25 AM
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Livermore, CA
Joined Sep 2004
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Quote:
Originally Posted by Murman View Post
Butch, have you seen the Divinity thread? That flying wing uses a KFm4 airfoil and will fly extremely slow without needing the booms.
I'm looking forward to the results of your latest project though. I have an 1811 2000kv motor that needs a home.

It looks ok, but besides slow, I'd better pitch controll.

I finally got the airframe put together. It ended up at 2.1ozs.
So it looks like it will be just over 4ozs flying, with 4ozs of thrust.
Its EPP with 6mm depron elevons.
I ran strakes out the back along the tails and out front.
I also ran a small CF rod under the tail to stiffen it.
Plus I ran a carbonfiber tube wing spar. Butch
.
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Old Mar 14, 2011, 08:38 PM
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Livermore, CA
Joined Sep 2004
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I finally got the electronics installed.
I got home before dark and took it out for a maiden.
It was a little windy, about 10mph and a bit gusty for a 10g outrunner.
But its EPP!, so I went for it.
I set my C/G at about 16-18% back, with a little reflex.
I didn't have a 6x3 prop ready so I put on a 5x3.
I taped on a 460mah 2 cell and gave it a toss, then powered it up.
Two clicks of up and it was doing just fine.
I brought it in and moved the batt back about 1/8", but it didn't seem to change anything much, plus I was fighting the wind a bit.
It flew real smooth and was stable in pitch. Maybe a bit too stable, as it didn't loop as well as I wanted. But for just flying around, it was fun.
I'll have to do some more test flying in some calmer weather to get it dialed in.
It ended up at 4.5ozs with the 460mah, so I may see if I can get a 340mah to ballance.
Butch
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Old Mar 14, 2011, 09:25 PM
I'm overcoming gravity!
Murman's Avatar
USA, NC, Huntersville
Joined Jul 2008
3,913 Posts
It wouldn't loop well because you forgot the elevator!
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Old Mar 14, 2011, 11:14 PM
If it flies, I will crash it
mxspode's Avatar
USA, CO, Westminster
Joined Jan 2008
3,022 Posts
Don't take this wrong Butch but it is actually a bit cooler looking then your previous efforts. Looks like it should flip out and turn into a robot all of the sudden, nicely done.

Rob...
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