HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Mar 01, 2013, 10:00 PM
Hobby King Hater
Kimber's Avatar
USA
Joined Mar 2005
4,593 Posts
Battery tray details. It is very important that the battery is secure.
Fire is a possibility, failed CoG settings, damaged electronics,
fouled control parts.

Spruce strips to stiffen, holes to lighten. Blink nuts, see next picture.
Glue block on the front. Support for the rear.



Stop to keep battery in correct location.

Little forward shift might not be too bad, but you sure don't want
it going backwards..



It will have a strap and velcro as well..
Kimber is offline Find More Posts by Kimber
Last edited by Kimber; Mar 01, 2013 at 10:18 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 02, 2013, 07:35 AM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
3,024 Posts
I'm learning from you, Thanks.

I am restoring a 30+ year-old Eagle I that belonged to the late father of a co-worker. It was cartwheeled, repaired, wrecked again, uncovered for a second round of repairs and never attended to, afterward.

I'm attending to the airframe, now, and plan to electrify the plane. Your efforts and photos will prove very helpful. I am grateful for your sharing your effort.

David
davidterrell80 is offline Find More Posts by davidterrell80
RCG Plus Member
Latest blog entry: Hand toss Avro Vulcan
Reply With Quote
Old Mar 03, 2013, 01:17 AM
Hobby King Hater
Kimber's Avatar
USA
Joined Mar 2005
4,593 Posts
David, any thing I can do just ask. Do you have the instructions?
I have saved all the wood if you need patterns for any thing.

Got a lot done today in a fairly short time. The tail is real simple.
They sure don't give you any extra in the kit, I had less than an
inch of one size and didn't mess up any of it. You need to save the
left over from the stabilizer for the fin or you won't have enough.
I needed to get these parts done because we are changing the
control systems and servo placement. Don't any surprise's later.

It feels good when you make a part and it fits perfect first time.

Still a lot of sanding to do, all the sanding is done on the fuselage.
We ordered some filler for the Sportster, I will fill the buggers where
the frames come thru the sides. They are right where the covering
will go.

Also got the windows fitted today. Brad reminded me how much
trouble he had with the Anniversary Cub because he waited til
it was almost done to try them, following the instructions...

Next is the servo tray. We are using 17g high powered servos.

Kimber is offline Find More Posts by Kimber
Reply With Quote
Old Mar 03, 2013, 07:57 AM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
3,024 Posts
Thanks for the offer. I'll certainly remember it.

I do have a copy of your instructions. What is most clear is the increase in materials science and engineering. The Eagle I fuselage is made of slabs of balsa. There are no cutouts and the use of ply is limited to firewall and engine mounts. The Vertical and Horizontal Stabilizers are also solid balsa. It made for easy construction but, I will be very interested to compare the weights of our respective wooden structures.

Oh, and the push rods are made from 1/4 inch wood dowels with a couple inches of wire attached to each end, bound to the dowel with thread and glued.

On one hand, the plane sort of reminded me of the Flintstones; built in the stone age. On the other, it reset my expectations about how finished a build had to be (or look) for it to be a good flying plane; maybe next time, I will think to myself "I don't have to go to the Hobby Shop, I have some dowels and wire (and band aids, or bubble gum, or whatever). I can build it myself."
davidterrell80 is offline Find More Posts by davidterrell80
RCG Plus Member
Latest blog entry: Hand toss Avro Vulcan
Reply With Quote
Old Mar 03, 2013, 08:04 AM
Registered User
epoxyearl's Avatar
United States, MD, Elkton
Joined Oct 2011
9,197 Posts
Your statement" it feels good when you cut something,and it fits the first time" sums up 'why' we build.

There's no doubt you're hooked for life.....and you still have your first flight to go!

I'm watching intently..You do some quality work.
epoxyearl is offline Find More Posts by epoxyearl
RCG Plus Member
Latest blog entry: Wheeling and dealing..
Reply With Quote
Old Mar 03, 2013, 08:16 AM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
3,024 Posts
One thing i'd like to suggest, based on previous experience. You may have not gotten there, but please consider fastening your push rods to the airframe in several places, or otherwise supporting them with structure.

They are quite flexible, and at high speeds, the resistance of the air loading on the elevator/rudder may cause the rods to flex, when you activate the servo to move them... and the surface response will be much diminished.
davidterrell80 is offline Find More Posts by davidterrell80
RCG Plus Member
Latest blog entry: Hand toss Avro Vulcan
Reply With Quote
Old Mar 03, 2013, 08:26 AM
Wasn't my fault, I had it and
Wacky1's Avatar
United States, WV, Ripley
Joined Jan 2012
168 Posts
Quote:
Originally Posted by davidterrell80 View Post
One thing i'd like to suggest, based on previous experience. You may have not gotten there, but please consider fastening your push rods to the airframe in several places, or otherwise supporting them with structure.

They are quite flexible, and at high speeds, the resistance of the air loading on the elevator/rudder may cause the rods to flex, when you activate the servo to move them... and the surface response will be much diminished.

Not only that but heat from the summer sun will "soften" the plastic too. Making control and trim diminish. I have better luck with the old wood dowel and wire pushrods.
Craig
Wacky1 is online now Find More Posts by Wacky1
Reply With Quote
Old Mar 03, 2013, 09:51 AM
Hobby King Hater
Kimber's Avatar
USA
Joined Mar 2005
4,593 Posts
They are wire control rods. The housing will be braced at each
bulkhead. With these you can get a straighter shot than with
the wood rod ones.
Been looking at different servo mounts and am going with a couple
rails across the fuselage instead of making a tray.
Kimber is offline Find More Posts by Kimber
Reply With Quote
Old Mar 03, 2013, 10:40 AM
Wasn't my fault, I had it and
Wacky1's Avatar
United States, WV, Ripley
Joined Jan 2012
168 Posts
Another way, more costly, is to use threaded rod and carbon fiber tube. Cut the rod to length, next cut the carbon tube about 3/4-1" shorter on both ends, and jam nut the tube in place on both ends of the threaded rod. Very strong.
Wacky1 is online now Find More Posts by Wacky1
Last edited by Wacky1; Mar 03, 2013 at 10:40 AM. Reason: kant sphell
Reply With Quote
Old Mar 04, 2013, 05:40 PM
Hobby King Hater
Kimber's Avatar
USA
Joined Mar 2005
4,593 Posts
Funny thing about CF rods, we ordered an assortment from Tower.
the box was just a little short and they bent them slightly to get
them in the box, and they stayed bent. Didn't think much about it
at first, then tried to use a couple of them, called Tower, but it had
been several months so we have a bunch of useless rod. About fifty dollars worth. The real small ones are fine,, the 1/8 and larger
are bowed.
Kimber is offline Find More Posts by Kimber
Reply With Quote
Old Mar 04, 2013, 07:21 PM
Registered User
sirzeppu's Avatar
United States, UT, Farmington
Joined Aug 2011
1,427 Posts
That's a real bummer on the carbon...someone wasn't thinking at Tower. I would think common sense would dictate they get packed straight because the majority of applications they are used for REQUIRE them to be straight. Sheesh.
sirzeppu is online now Find More Posts by sirzeppu
Reply With Quote
Old Mar 04, 2013, 07:50 PM
Wasn't my fault, I had it and
Wacky1's Avatar
United States, WV, Ripley
Joined Jan 2012
168 Posts
That is crazy, bent carbon rods are pretty much useless.
Wacky1 is online now Find More Posts by Wacky1
Reply With Quote
Old Mar 04, 2013, 08:24 PM
Hobby King Hater
Kimber's Avatar
USA
Joined Mar 2005
4,593 Posts
Quote:
Originally Posted by Wacky1 View Post
That is crazy, bent carbon rods are pretty much useless.
Kimber is offline Find More Posts by Kimber
Reply With Quote
Old Mar 04, 2013, 11:18 PM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
3,024 Posts
If the bend set, I think the rods are made with a thermoplastic such as polyester and not epoxy. It wouldn't hurt to set them up on a cookiesheet and cook them... this datasheet says the heat distortion temp is 289 degrees F. Use some metal to set them up so the bow is up in the air, heat them to about 300 degrees, let them get soft and gravity will straighten them out. Carefully pull them out and the air will cool them down.

http://www.green-resins.com/pdf/T341-68G.pdf
davidterrell80 is offline Find More Posts by davidterrell80
RCG Plus Member
Last edited by davidterrell80; Mar 04, 2013 at 11:25 PM.
Reply With Quote
Old Mar 04, 2013, 11:26 PM
Hobby King Hater
Kimber's Avatar
USA
Joined Mar 2005
4,593 Posts
48" will not fit in our oven! Good idea, maybe find a music wire that
fits the hole and heat it with a heat gun?? Can't loose much.

Thanks for the info, will keep you posted.
Kimber is offline Find More Posts by Kimber
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Yippee! Got my first "real" quad coming!! TurboRacer Multirotor Talk 18 Feb 19, 2013 09:20 AM
Build Log #46 Model building clinic >CG Eagle 2< my first kit PoniesatemyBagel Balsa Builders 15 Oct 23, 2012 04:49 PM
Discussion My first real build, MQ-9 Reaper ll Bullish ll Electric Plane Talk 4 Jul 07, 2011 08:07 PM
Discussion First real heli building question jfl14609 Beginner Training Area (Heli-Electric) 7 Dec 08, 2009 07:19 PM
First real pico flight - first real pico crash - PARTS INFO PLEASE! rojoyinc Electric Heli Talk 2 Feb 23, 2002 11:46 AM