Thread Tools
Oct 04, 2012, 06:48 PM
Registered User
OK, one more question: I am ready to channel in the 16g wire into the wings. I am wondering the best place for ESC location. As I understand, in the wing box next to the batteries if best for performance but heating is going to be a big issue as venting will be difficult. Just behind the fan allows for cooling but that is quite away from the battery(as much as 35 inches). My thought is to place them in the undersurface of the wing near the root (within ~6 inches of the batteries) in a cut out area and place a hinged plastic vent over the top. Ideas?
Sign up now
to remove ads between posts
Oct 05, 2012, 04:35 PM
Up-Out-&-Gone
demondriver's Avatar
Quote:
Originally Posted by rlebaron
OK, one more question: I am ready to channel in the 16g wire into the wings. I am wondering the best place for ESC location. As I understand, in the wing box next to the batteries if best for performance but heating is going to be a big issue as venting will be difficult. Just behind the fan allows for cooling but that is quite away from the battery(as much as 35 inches). My thought is to place them in the undersurface of the wing near the root (within ~6 inches of the batteries) in a cut out area and place a hinged plastic vent over the top. Ideas?
From what the Electric experts now say Rleb, they say have your ESC's as close to the batteries as possible, so maybe put the ESC's in the forward section of the fuselage or in the bottom of the wings the same way Windrider AKA Ming does his 737.
Latest blog entry: RC F-102 Maiden flight!
Oct 07, 2012, 11:03 PM
Registered User
So these just showed up from HP-took about 3 days to arrive-FAST! I have not powered up the retracts but I was pleasantly surprised with how nice the wheels were. The plan is to assemble the gear/trucks this weekend (hopefully). Still need to find a decent steerable nose retract- any ideas?
Oct 12, 2012, 01:04 PM
Scope Creep Specialist
MrADT's Avatar
Quote:
Originally Posted by rlebaron
So these just showed up from HP-took about 3 days to arrive-FAST! I have not powered up the retracts but I was pleasantly surprised with how nice the wheels were. The plan is to assemble the gear/trucks this weekend (hopefully). Still need to find a decent steerable nose retract- any ideas?
I picked up some retracts from HK. They seem solid enough, although for now they are still just mocked up. There are some pictures in here of the LG trucks if you want to take a look. There's also a like to the retracts I am using.

https://www.rcgroups.com/forums/show....php?t=1704586
Oct 13, 2012, 09:44 PM
Registered User
Awesome- good to know. Been working on the landing gear. I still have some dremmel work to do setting up the elastic bands.


Quote:
Originally Posted by MrADT
I picked up some retracts from HK. They seem solid enough, although for now they are still just mocked up. There are some pictures in here of the LG trucks if you want to take a look. There's also a like to the retracts I am using.

https://www.rcgroups.com/forums/show....php?t=1704586
Oct 14, 2012, 12:54 AM
Up-Out-&-Gone
demondriver's Avatar
Quote:
Originally Posted by rlebaron
Awesome- good to know. Been working on the landing gear. I still have some dremmel work to do setting up the elastic bands.
Baron your 747 wheel trucks look great!
Latest blog entry: RC F-102 Maiden flight!
Oct 14, 2012, 02:06 AM
Scale Modeler
Concordefan's Avatar
Quote:
Originally Posted by demondriver
Baron your 747 wheel trucks look great!
I'll double that......
Oct 15, 2012, 02:03 PM
Scope Creep Specialist
MrADT's Avatar
Quote:
Originally Posted by rlebaron
Awesome- good to know. Been working on the landing gear. I still have some dremmel work to do setting up the elastic bands.
Those look pretty slick! are they going to remain horizontal, or are you going to incorporate the tilting on the wing gear trucks?
Oct 15, 2012, 02:46 PM
Registered User
Quote:
Originally Posted by MrADT
Those look pretty slick! are they going to remain horizontal, or are you going to incorporate the tilting on the wing gear trucks?

Thanks. Yeah I will dremmel out a little where the struts attach to give some tilt then probably use DD method of elastic banding the truck to the strut. More to come.
Oct 16, 2012, 12:18 PM
Registered User
I have the fan choice narrowed down to this Lander type 64mm setup from HK

http://www.hobbyking.com/hobbyking/s..._Version_.html

versus Change Sun 70mm 10 blades with turnigy L2855-2800 outrunners-

http://www.hobbyking.com/hobbyking/s...ner_630w_.html.

Any thoughts or preferences?
Oct 18, 2012, 03:39 PM
Scope Creep Specialist
MrADT's Avatar
Quote:
Originally Posted by rlebaron
I have the fan choice narrowed down to this Lander type 64mm setup from HK

http://www.hobbyking.com/hobbyking/s..._Version_.html

versus Change Sun 70mm 10 blades with turnigy L2855-2800 outrunners-

http://www.hobbyking.com/hobbyking/s...ner_630w_.html.

Any thoughts or preferences?
I don't have any data on thrust output for either option. If they are comparable,I say, go with the 10-blade... the changesun is nearly one third the weight of the alloy fan. And the additional diameter ought to help your thrust output. Plus, more blades just look cooler!
Oct 19, 2012, 10:14 AM
Registered User
LuvEvolution7's Avatar
deffinitely subbed. watching with interest.

Rich
Nov 13, 2012, 09:18 PM
Registered User

Wingbox build


So after a crazy month at work I found some time to keep pushing ahead. I finally got the fuse put back together after coring it out. I am not sure of the overall weight reduction but have a majority of the bits in a box to measure. I went ahead and started with the wing box. The pictures pretty much tell the story. The second and third carbon spars were supposed to have been just one but I was worried the combined length would be too long/deep once embedded given the dihedral so I oped for two instead. I still need to sand the box to contour but figured that would be an easier task once it is attached to the fuse. The pisser is that measuring from the wingtips as well as mid wing, the left wing looks to be about 1/4" off- must have gotten a bit off during the box assembly. I hope it won't matter much but we'll see- There is plenty of foam at home depot to build again.

That brings me to the next thought. I am nearing(ish) the end of the airframe assembly so now the real fun will begin with adding electronics and mechanical components as well as finishing the thing. Where are you all getting decals from? I thought about just importing some images into my tile program and printing them on decal paper but figured you pros might have an easier way.

As always thanks for all the input and if someone sees something grossly wrong with everything, please let me know before I start the finish work.
Nov 13, 2012, 10:05 PM
Up-Out-&-Gone
demondriver's Avatar
Looking amazing Ryan. . .Love the solid foam wings & carbon fiber structure. . . .I use airlinercafe.com for my decals.
Latest blog entry: RC F-102 Maiden flight!
Nov 14, 2012, 08:41 AM
Registered User
carrerars's Avatar
WOW, WOW, WOW !!!!!
This is a incredibly nice plane....
Keep up the good work
Markus


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion 747-400 build w747 Electric Ducted Fan Jet Talk 418 Oct 17, 2013 04:33 PM
Data Boeing B747-8I is being modelled in 3D on RCU Concordefan RC Airliners (Commercial, Cargo, Troop Carrier) 22 Jun 28, 2012 10:08 AM
Help! Looking to build a large scale 747-400 RoJack1 Giant Electric Planes 3 Jan 03, 2009 10:12 PM
Build Log Depron 747 Build teha99 Foamies (Scratchbuilt) 26 Nov 14, 2008 02:22 PM
Build Log first build log on rcg, 747 edf foam and tape Foamies (Scratchbuilt) 14 Jun 20, 2008 12:35 AM