HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Feb 13, 2013, 06:45 AM
Registered User
Gree's Avatar
Sydney, Australia
Joined Jun 2006
2,940 Posts
Landing Gear Complete

Gear Doors are all Done
I finished manufacturing the inside of the lower gear doors, riveted, painted, and installed them. I must say it is satisfying to see something you devised years ago fall back together and work first pop.

Next is to hook up and the gear and cycle it properly (after I get the gear door sequencer working correctly), and make any fine tuning required to the fit of the doors.

Not much more to say on this really. I'll let the pictures tell the story...


Brainwave?
It just came to me when I wasn't thinking about it yesterday, that I had not wired up the gear sequencer correctly. Instead of running the receiver to the unit, and which then connects to the air value servo and the two gear door servos, I think I just ran a Y harness to both the unit and the air valve servo. I didn't have time to check this, but this may be the source of the unit not working as it used to... I goes it had been a long time since I used it last. Fingers crossed for that one!
Gree is offline Find More Posts by Gree
Reply With Quote
Sign up now
to remove ads between posts
Old Feb 13, 2013, 10:07 AM
Airplane crasher
CapMike's Avatar
USA, CT, Shelton
Joined Jan 2008
2,732 Posts
Looing damn fine Gree
CapMike is offline Find More Posts by CapMike
Reply With Quote
Old Feb 13, 2013, 01:11 PM
swede
denial15's Avatar
United States, UT, Vineyard
Joined Aug 2005
3,835 Posts
Eh. I guess that'll work, if that's the best you can do.
denial15 is offline Find More Posts by denial15
Reply With Quote
Old Feb 13, 2013, 02:24 PM
Scale Builder
United States, AZ, Litchfield Park
Joined Jul 2002
2,485 Posts
Spectacular Gree.
Chad Veich is offline Find More Posts by Chad Veich
Reply With Quote
Old Feb 13, 2013, 10:16 PM
Registered User
V2rider's Avatar
USA, MD, Hagerstown
Joined Jun 2009
3,281 Posts
Quote:
Originally Posted by denial15 View Post
Eh. I guess that'll work, if that's the best you can do.
(better than LOL, although Idid)
V2rider is offline Find More Posts by V2rider
Reply With Quote
Old Feb 14, 2013, 07:03 AM
Fly it like U stole it
Pickle72's Avatar
Champaign, Il
Joined Mar 2008
2,418 Posts
Wow! I've always been s sucker for a nice set of legs!

On a side note I am so excited for you that this is almost finished up, but also a bit sad. I've been silently following this from just about the beginning, and am going to miss seeing your updates. I guess you are going to have to start another awesome build to fill the void

Matt
Pickle72 is offline Find More Posts by Pickle72
Reply With Quote
Old Feb 15, 2013, 01:48 AM
Registered User
Gree's Avatar
Sydney, Australia
Joined Jun 2006
2,940 Posts
Thanks guys! And don't worry Matt, there are plenty of places in the queue. The next will most likely be a 190D9.


Just to feel a sense of achievement, I thought I would revisit my 'to do' list...

1. Make the rear canopy attachment and install
2. Glue the canopy on

3. Make the landing light and install
4. Make the wing tip navigation light interiors and install, plus glue on the wingtip lenses
5. Get a new motor shaft adapter from Truturn. I found out mine has the wrong thread!
6. Make insides of lower gear doors
7. Make insides of middle gear doors
8. Attach gear doors to struts
9. Attach inner gear doors

10. Make trim tab actuators for ailerons
11. Final coat of paint for ailerons
12. Attach ailerons and hook up servos

13. Put on cowl checking that motor is centred
14. Paint tips of prop yellow
15. Paint prop hub yellow

16. Make tail navigation light
17. Work out how to open the battery hatch and make solution

18. Weather the wing etc
19. Make and install the guns

20. Get new 6S 5000maH batteries
21. Balance
22. Find a place to actually fly this thing!
23. Pray hard to a god I don't believe in
24. Fly...

GREY = done!

I have to add this to the list too...

25. Fix bloody gear door sequencer! - FIXED!


We are slowly getting there!
Gree is offline Find More Posts by Gree
Last edited by Gree; Feb 23, 2013 at 04:49 AM.
Reply With Quote
Old Feb 15, 2013, 03:51 AM
Registered User
Mark Derbyshire's Avatar
United Kingdom, England, Salisbury
Joined Jul 2011
108 Posts
Quote:
Originally Posted by Gree View Post
I have to add this to the list too...

25. Fix bloody gear door sequencer!


We are slowly getting there!
If you can't fix it I can highly recommend one of these

http://www.pololu.com/catalog/product/1350

I used them on all my retract birds. They are programmable via USB using a script. If you want it I can send you the script for my mustang and can modify it for timings etc

Plus they are half the price and smaller of the one you have

Oz stockist

http://www.robotgear.com.au/Product.aspx/Details/403

http://australianrobotics.com.au/cat...vo-controllers

--
Mark
Mark Derbyshire is offline Find More Posts by Mark Derbyshire
Reply With Quote
Old Feb 15, 2013, 10:30 AM
Limey Jeff
Jeff Glasser's Avatar
Glastonbury, Somerset. U.K.
Joined Mar 2009
347 Posts
Denial15...you took the words right out of my mouth!!!!

Jeff
Jeff Glasser is offline Find More Posts by Jeff Glasser
Reply With Quote
Old Feb 16, 2013, 10:07 AM
Pursuit of Happiness
Ron101's Avatar
Brentwood, California
Joined Jul 2007
7,199 Posts
Wow man... just perfect
you make me sick

put this thing in a museum or my shop

the lines look perfect on the gear doors..... great work
Ron101 is offline Find More Posts by Ron101
Reply With Quote
Old Feb 16, 2013, 11:23 AM
Registered User
United States, ID, Boise
Joined Apr 2012
27 Posts
Gree. Very nice build. Here is some information for you in interior and primer colors.

Cheers,
1ruffdog is offline Find More Posts by 1ruffdog
Reply With Quote
Old Feb 16, 2013, 01:25 PM
Registered User
seeingeyegod's Avatar
United States, OR, Portland
Joined Jan 2008
1,796 Posts
awesome, reminds me of the fiddly gear doors and gear well (same color green!) on a plastic f-84 model I never finished, and yours actually move!
seeingeyegod is offline Find More Posts by seeingeyegod
Reply With Quote
Old Feb 18, 2013, 03:38 PM
Registered User
United Kingdom, England, Keighley
Joined Nov 2009
147 Posts
gree just a quick question . did you offset the motor the same as a glow engine would be. as on the plane ?
amxen is offline Find More Posts by amxen
Reply With Quote
Old Feb 18, 2013, 10:39 PM
Registered User
Gree's Avatar
Sydney, Australia
Joined Jun 2006
2,940 Posts
A Little Good News

We Have Working Gear Doors
On a thesis writing break, I popped down and had another look at the gear door sequencer. I noticed that the LED was not on sometimes. Turns out it was a simple case of dodgy wiring on the part of the manufacturer. The signal in wire from the receiver is soldered directly to the board. They basically stripped too much insulation from the wires, meaning they could bend about and touch each other, shorting out the unit. Pulling the wires taught and separating them, then hitting the area with hot glue solved the problem...

I will post a video of the final doors working when I get time to assemble the plane again. I am thinking of replacing the door servos with some stronger digital servos to stop the buzzing... I think I have some laying around somewhere.



Thanks very much for all of the great comments guys...

Quote:
Originally Posted by Mark Derbyshire View Post
If you can't fix it I can highly recommend one of these

http://www.pololu.com/catalog/product/1350
Thanks Mark, luckily I won't need one, but it is good to know that these exist. You could do some really cool stuff with these! Maybe for the next build...


Quote:
Originally Posted by Jeff Glasser View Post
Denial15...you took the words right out of my mouth!!!!
Good to have you back on board man...


Quote:
Originally Posted by Ron101 View Post
Wow man... just perfect
you make me sick

put this thing in a museum or my shop

the lines look perfect on the gear doors..... great work
Thanks Ron. I tried really hard to get the doors shaped right. They are exact copies from a 3 view scaled up. I am chuffed you've noticed!



Quote:
Originally Posted by 1ruffdog View Post
Gree. Very nice build. Here is some information for you in interior and primer colors.
Thanks 1ruffdog. Always good to have good references. I won't be repainting anything now though!



Quote:
Originally Posted by seeingeyegod View Post
awesome, reminds me of the fiddly gear doors and gear well (same color green!) on a plastic f-84 model I never finished, and yours actually move!
They do now! Thanks man...


Quote:
Originally Posted by amxen View Post
gree just a quick question . did you offset the motor the same as a glow engine would be. as on the plane ?
Hi axmen. Yes I did offset the motor fractionally. Not as much as the plans called for, but my cowl is actually slightly crooked to make the motor look centred. I have some down thrust as well. I think it should be fine. I did the same for my CMP Zero and it flies great.
Gree is offline Find More Posts by Gree
Reply With Quote
Old Feb 20, 2013, 06:19 AM
Registered User
Gree's Avatar
Sydney, Australia
Joined Jun 2006
2,940 Posts
Retracts Test

Gear Doors
Here is the video I promised of the gear doors in action. I still need to fiddle with the door throws and build a stop for the inner doors so they don't close too far (as you'll see in the video). I will make the doors open a lot more so they are more vertical. A simple adjustment of the sequencer unit when I get some time...

P47 Completed Retract Test (1 min 26 sec)




A Little More Weathering
I also did the exhaust stains on the fuse and inner gear doors, and cordite stains on the wing while I had the plane together. I used Tamiya smoke. A tricky paint. It seems to get a lot darker as it dries. It is semi-clear so you think you have put a lot less on than you actually have. Oh well, it is what it is!



I also put the prop on (with its fancy new yellow tips) for eye candy...
Gree is offline Find More Posts by Gree
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question motor battery prop combination for top flite P47 63"? Gree Glow to Electric Conversions 27 Jul 20, 2014 08:42 PM
Discussion Yes another top flite giant P47 build pand9 Fuel Warbirds 5 Jan 07, 2009 06:25 AM
Discussion P47 Top Flite - Making Off rushspbr Fuel Warbirds 18 Dec 07, 2006 09:03 PM
For Sale Top Flite P47 Tom Jennings Aircraft - Fuel - Airplanes (FS/W) 7 Jan 16, 2006 11:51 AM
Top Flite DC-3 Eddie P Scale Kit/Scratch Built 10 Jul 20, 2001 06:11 PM