HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Apr 03, 2012, 05:30 PM
Registered User
Ian Easton's Avatar
United Kingdom, Scotland, Fife
Joined May 1999
2,842 Posts
Thanks OT for the photos. Earlier in this thread some of the builders were recommending that the cabin area get strengthed to support the wing stresses. I wrapped some carbon tow completely around the fuselage and cabin before adding the sheeting. I saw in your photos that you hadn't done anything extra and thought I'd point it out.
Ian Easton is offline Find More Posts by Ian Easton
Reply With Quote
Sign up now
to remove ads between posts
Old Apr 04, 2012, 09:23 AM
Registered User
Oxford, UK
Joined Mar 2009
65 Posts
What I did towards strengthening the cabin area was to insert/glue cocktail sticks (2mm dia), made easy with a mini drill, at junctions. I also used epoxy resin where I thought appropriate.
In the picture there are 6 on the side (one not seen) and 6 on the top (2 at the front covered over) as well as others underneath.
ol Timer is offline Find More Posts by ol Timer
Last edited by ol Timer; Apr 16, 2012 at 03:15 AM. Reason: Additional text
Reply With Quote
Old Apr 17, 2012, 10:49 PM
Registered User
Ian Easton's Avatar
United Kingdom, Scotland, Fife
Joined May 1999
2,842 Posts
I've mounted the tail to my liking. I put a blind nut in the fin (still to sheet the front of it) and have it held in to a piece of ply in the fuselage and an insert into the top of the fuselage. I put a hard carboard tube inside the fuselage to guide the 2" nylon bolt. That way iy wont dissapear down the fuselage at some inconvenint time. The tube also passes through the rear wheel fairing. Some tidying up left to do at the back before covering starts.
Ian Easton is offline Find More Posts by Ian Easton
Reply With Quote
Old Apr 18, 2012, 02:44 AM
Sic itur ad Astra
sparks59's Avatar
United Arab Emirates, Abu Dhabi, Abu Dhabi
Joined Aug 2009
1,603 Posts
I like your neat work Ian!
sparks
sparks59 is offline Find More Posts by sparks59
Reply With Quote
Old Apr 20, 2012, 02:06 PM
Registered User
Oxford, UK
Joined Mar 2009
65 Posts
A nose job

The engine cowl was made by first stacking mostly half inch pieces of sheet along the engine bearers, keeping them together with patches of double-sided adhesive tape.
The assembly was then attached to the engine bearers with same tape.
This was then carved and sanded to the profile shown.
Each segment was then numbered before being carefully prised apart with a steel erase shield (0.1mm thick), to minimise lever marks. I guess a feeler gauge would have done the same.
An electric fret saw was then used to cut the middle out of each segment.
The segments were then glued together as seen in the photos.
Smooth finishing still to be done.
This procedure may be routine stuff to many of you but to me it was pioneer work!
Or maybe there is an easier way?
ol Timer is offline Find More Posts by ol Timer
Last edited by ol Timer; May 01, 2012 at 05:11 AM. Reason: Two pics added
Reply With Quote
Old Apr 20, 2012, 02:53 PM
Registered User
Joined May 2009
559 Posts
There could be an easier way, but there could hardly be a way to do it that makes a cleaner job.
That's really nice work!

David
cd_webb is offline Find More Posts by cd_webb
Reply With Quote
Old Apr 20, 2012, 04:15 PM
Registered User
Chris Jenkins's Avatar
South Korea
Joined Feb 2005
723 Posts
Nice OT.....looking very good. Keep at it !
Chris Jenkins is offline Find More Posts by Chris Jenkins
Reply With Quote
Old Apr 21, 2012, 07:23 AM
Registered User
Tim Trick's Avatar
The Netherlands
Joined Apr 2004
578 Posts
That cowl is looking very tidy. An alternative is to plank the cowl although in the long run I am not sure if it is easier or quicker.

http://www.rcgroups.com/forums/showt...=419079&page=3

The best method is whatever suits you best and you are comfortable with.

Ian, nice simple job of holding the tailplane down-it shouldn't go anywhere!

cheers

Tim
Tim Trick is offline Find More Posts by Tim Trick
Reply With Quote
Old Apr 21, 2012, 01:16 PM
Registered User
Oxford, UK
Joined Mar 2009
65 Posts
Thanks for the compliments.
And thanks also for the link Tim, I followed it through and wish I had seen the BB Falcon progress much earlier in my build.
Still plenty to do, but should be through before the next snow!
Ray
ol Timer is offline Find More Posts by ol Timer
Reply With Quote
Old Apr 22, 2012, 02:35 AM
Registered User
Ian Easton's Avatar
United Kingdom, Scotland, Fife
Joined May 1999
2,842 Posts
The servo tray went in today as well as all the connections to them.
Ian Easton is offline Find More Posts by Ian Easton
Reply With Quote
Old Apr 25, 2012, 01:38 PM
Registered User
Oxford, UK
Joined Mar 2009
65 Posts
The Falcon plan shows press-studs to attach the engine cowl.
The way I anchor them is to solder a length of safety pin (which solders well) to the male stud and some tubing to the female item. In the latter case it can either be brass or my preference, wire ferrules. The ferrules (with plastic cup removed) are tinned copper tubes with a funnel shaped opening and come in different sizes.
The male studs are fitted first and then used to mark positions for the mating part.
ol Timer is offline Find More Posts by ol Timer
Reply With Quote
Old May 09, 2012, 11:21 PM
Registered User
Ian Easton's Avatar
United Kingdom, Scotland, Fife
Joined May 1999
2,842 Posts
The engine is mounted now, just working on finalizing the cowl cut out shape. All that's left to do after that is cover it!
Ian Easton is offline Find More Posts by Ian Easton
Last edited by Ian Easton; May 14, 2012 at 09:45 PM.
Reply With Quote
Old May 14, 2012, 09:50 PM
Registered User
Ian Easton's Avatar
United Kingdom, Scotland, Fife
Joined May 1999
2,842 Posts
What do you guys recommend for a fuel tank size? The engine has never been in a model before and the instruction manual says a 10oz tank will give about 10 minutes at full throttle. Well, considering I wont be barreling around the sky at full throttle I though 6oz might be adequate.
Ian Easton is offline Find More Posts by Ian Easton
Reply With Quote
Old May 15, 2012, 03:45 PM
Registered User
United Kingdom, England, East Horsley
Joined Dec 2004
21 Posts
Some more progress on the build. Here's the nose shaping completed.

Name: P1020341.jpg
Views: 103
Size: 158.8 KB
Description:

I had some trouble getting 3/32 balsa windscreen frame to bend round without cracking, even when wetted. So I decided to laminate the windscreen from 1/32 plywood and 1/16 balsa. Here's the 1/32 plywood layer:

Name: P1020342.jpg
Views: 116
Size: 175.4 KB
Description:

and here's the 1/16 balsa top layer. I've also fitted the side frames.

Name: P1020343.jpg
Views: 118
Size: 168.8 KB
Description:

Next step will be the cowling. I'll need to decide how to make this.
BalsaBasher is offline Find More Posts by BalsaBasher
Reply With Quote
Old May 16, 2012, 04:26 AM
Sic itur ad Astra
sparks59's Avatar
United Arab Emirates, Abu Dhabi, Abu Dhabi
Joined Aug 2009
1,603 Posts
Nice carpentry BB.
sparks
sparks59 is offline Find More Posts by sparks59
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Repost: Keil Kraft Outlaw Plan required. Steve_Bennington Sport Planes 22 Jul 21, 2010 09:26 AM
Looking fo Keil Kraft plans Ian Easton Free Flight 12 Dec 30, 2009 01:57 PM
EP and R/C Keil Kraft Chief? Ragnar Electric Sailplanes 10 Oct 07, 2009 05:36 AM
Keil Kraft Senator Tony Oliver Free Flight 12 Nov 14, 2004 10:40 PM