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Member postings for Caveman

Here is a list of all the postings Caveman has made in our forums. Click on a thread name to jump to the thread.

Thread: WolstonFlyer's Tucano
11/03/2013 22:20:37

WolstonFlyer, looking good, and quite familiar!

Are you going to use an undercarriage or hand launch and belly-land?

I was pleasantly surprised how quickly and easily the balsa can be shaped with a razor plane and a bit of sandpaper. I now feel confident to move onto more demanding models.

From your photos it looks like you've got it cracked too - looking forward to seeing how you get on with the remaining build.

GDB

Thread: The Feisler F103 - better known as the V-1
11/03/2013 19:26:16

Simon, I was browsing and came across this:

http://www.outerzone.co.uk/plan_details.asp?ID=2212

I don't know if you've seen it already, but thought it might be of interest.

GDB

Thread: Cavemans Tucano Build....
11/03/2013 13:13:34

Right, here goes, the final leg:

Added a couple of 'seats' and instrument panels for the pilots - it's a shame both pilots are identical, it would have been nice if they were looking in different directions, but at least they're a suitable size.

Instrument panels courtesy of the internet, printed on paper and then laminated with Selotape, and glued on.

img_4684_s.jpg

I painted to cockpit black - in retrospect it would have been better with some white or grey detailing, but where do you stop?

img_4689_s.jpg

Wings covered and canopy glazed. I didn't particularly enjoy fixing the canopy - I bought some canopy glue as advised by GrahamC which stuck like the proverbial, thanks Graham, but I made the formers for the canopy to fit the body of the plane, so when the canopy is fitted it is a mm or 2 proud of the body!!

In reality it's not that noticable and it makes it easy to get hold of it for removal. It's attached with a tongue at the front and magnets at the back.

Incidentally, I thought that the quality of the canopy moulding was pretty poor, lots of blemishes and on one side two great indents. Fortunately most of the indents were cut way when fitting, and once fitted it looks quite good. But, certainly almost every High Street bubble pack is of better quality. Was mine the only one like this?

img_4691_s.jpg

Covering of the fuslelage underway.

This is only the second model I've covered. I have to say that I found some areas challenging - perhaps I should have approached some of it differently. Some parts don't bear close inspection, but, viewed from a short distance it's fairly presentable.

I decided at an early stage not to go down the scale appearance route.

A, because it involves a lot of time, effort and detailing,

B, because it costs more in materials,

C, the model itself isn't a true scale model,

and D, in my novice flying hands it may not last long enough to make the effort worth it!

img_4695_s.jpg

The 99% finished article.

I used Tower Pro MG90S servos, Emax GT2815/07 motor with APC 11x7E prop , 40A ESC and 2200 3S Lipo.

My Tx is a Futaba 6EX, with FrSky TRF6 Fasst receiver.

The covering is Dark Blue and Peach from Giant Shark, with white Trimline in various widths.

The model ready to fly, including battery, weighs 1.23kg - 2lb 12oz.

The motor uses 349W, giving a ratio of around 128w/pound, so it should perform reasonably - I'm not looking for a rocket!

----------------------------------

So, just when it seemed to be all over I received the latest copy of RCME. Aha, Nigel suggests that the model needs ply doublers over the wing seat area - Grrrrr!

I had actually considered, as I was making the wing removable, installing a couple of 6x6mm balsa longerons in this area, but decided that the battery tray might add sufficient strength. However, in light of the article I added a couple of strips of 3mm birch ply to each side.

img_4699_s.jpg

Incidentally, I installed my first battery 'box' towards the rear of the overwing area, where initial balancing suggested it should be, but when covered, all electronics etc. installed this proved to be too far to the rear. A revised housing with the battery tight to the rear of F2 give a slightly nose heavy balance (with no need for added balast) which I will use initially. The battery can always be moved rearward if necessary.

Well, that's it - I hope some of this will be interesting/useful to somebody!

Cheers GDB

11/03/2013 11:52:10

Olly,

It's definately powered!

I have enough problems keeping them in the air with a motor, and the terrain in my part of the world is a little too flat for slope soaring.

GDB

11/03/2013 11:47:07

Hi WolstonFlyer,

If you look at the build you will see that the snakes cross over at the rear of the fuselage, so the exits are about 5mm different in height. I made the exit holes about 65mm from the rear of the tail post.

img_4701_s.jpg

Rudder snake

img_4702_s.jpg

Elevator snake

These measurements are based purely on how it looked like they might best fit, given the postition of the control horns, and trying to avoid unnecessary friction between the inner and outer tubes. It seems to work OK!

I don't know if there's a more scientific way of doing things - I'm a novice at this hobby so I'm at the "make it up as you go along" stage!

As you can see the model's finished now - I'll post the build completion later today.

Cheers GDB

11/03/2013 11:26:40

Steve, please feel free to change the title - Caveman's Tucano build? or something similar?

I'm just organising some more pictures to illustrate the, now completed, build and to reply to WolstonFlyer, which I will post shortly.

Cheers GDB

Thread: Prolux Iron
20/02/2013 18:33:03

Another vote for the digital version. I got mine as a freebee with my original subscription to RCME and have put it to good use since.

As it shows the actual temperature it's very easyto set exactly the temperature required to suit the job in hand.

GDB

Thread: Cavemans Tucano Build....
15/02/2013 14:37:24

Thanks for your advice Graham, order for canopy glue placed!

GDB

14/02/2013 20:38:22

Quite a few days have passed since my last report, but domestic duties have taken precedence for some of those!!

img_4670_s.jpg

img_4671_s.jpg

Elevator, rudder and aileron servos fitted

img_4672_s.jpg

Nose ring fitted and shaped to match (almost) 50mm spinner

img_4673_s.jpg

I cut out the motor/ESC hatch with a razor saw and fitted magnet to retain it. However, while this works very well it allows the hatch to side sideways, so fitted a couple of strips of balsa to locate it accurately. It doesn't look very pretty, and although it isn't really seen I'll redo it to look a bit more professional later.

img_4676_s.jpg

Magnetic catch also added to canopy floor. This should be enough to retain it - time will tell.

img_4680_s.jpg

Undercarriage made from 10swg piano wire and fitted with saddle clamps. As I would like to use an 11x7 prop I have made the legs about 20mm longer than shown on the drawing to give sufficient ground clearance - I may have overdone it - but can always make another, shorter set. The wheel uses here are 70mm, for use on soft ground with longish grass. These will be replaced with 50mm wheels for summer use.

img_4682_s.jpg

This how it looks now. At least it looks like it might fly!

I've roughly checked the COG and it appears that it may be a little nose heavy even with the battery (2200 3s) set right back. If necessry I can add a bit of lead to the rudder horn to get it right.

Next job is to complete the office (pilots are a replacement set from HobbyKing for their Vampire EDF) and sort out the canopy.

I have the vacuum formed canopy and haven't ever fitted one before so that will be interesting, but I've got some good ideas which I hope will lead to success - we shall see!!

GDB

Thread: Building Boards - again
07/02/2013 13:28:56

Ian, I had the same reservations regarding achieving a flat surface.

I did consider buying a float glass table from Ikea as a very flat surface, but, ended up buying the following:

'Vika Amon' table top (cream melamine finish) £13

'Vika Adils' legs (4) silver finish and adjustable £2.50/each

On top of that I use a piece of plasterboard, again flat as a pancake and excellent for pinning into.

To complete the picture I also bought a 'Tertia' ''anglepoise" type lamp which clamps to the table top, gives excellent lighting and which can be placed exactly where needed. Add £5 for a couple of 'Sparsham' low energy bulbs to complete the pictre.

So, for a total outlay of £36.50 I've got a very flat, easily erected and well sized work table which is quickly dismantled for storage, and, of course, can be used for other purposes when no building is in progress.

Here's picture of it in use:

img_4573_s.jpg

GDB

Thread: Cavemans Tucano Build....
03/02/2013 22:45:11

img_4650_s.jpg

Rear of fuselage joined using SLEC jig, which I also used to join the fuselage halves.

Vertical stab post also added at this stage.

img_4653_s.jpg

SLEC jig used to draw the nose together for epoxying the motor mount. Right thrust added at this stage by shortening the right-hand fuselage side ans sanding smooth.

img_4654_s.jpg

Top of fuselage added and sanded to shape.

img_4655_s.jpg

Torque rods inserted into the wing and cut-out for servo cut.

As the wing will be removeable, and won't gain any strength from being fixed to the fuselage, I epoxied some glass-cloth to the wing joint to add strength.

img_4657_s.jpg

Spigot from two thicknesses of 3mm birch ply fixed with epoxy into a slot in the front edge of the wing. The spigot is slotted so that it ties in with the forward dihedral brace.

img_4659_s.jpg

A sheet of 3mm birch ply under the wing follows the fuselage line and adds considerable strength to the wing and allows a positive location for the wing bolt. Thought of using 2 bolts but decided on one - I can always change it later.

img_4661_s.jpg

3mm birch ply former takes the wing front spigot.

img_4662_s.jpg

Retaining nut for wing bolt.

img_4666_s.jpg

img_4667_s.jpg

img_4668_s.jpg

Tail feathers fixed

img_4669_s.jpg

Control snakes trial fitted - another restraint to be added later.

img_4665_s.jpg

Now it's starting to look like a Tucano, although there's a long way to go before it's finished.

GDB

03/02/2013 21:57:06

Plenty of work been done on the Tucano build in the last ten days.

img_4640_s.jpg

Wings glued ready for sanding

img_4642_s.jpg

3mm birch ply panels sunk into underside of wing to take the landing gear.

img_4643_s.jpg

Wings sanded to approximate shape. Final shaping will be done immediately prior to covering. Looking out the window it's just as well I've got some building to do - no chance of flying

img_4644_s.jpg

Elevators joined using a length of spruce.

img_4645_s.jpg

Piece added to top of fuselage side to make up for difference in width of balsa sheet between 100mm and 4 inches as noted when making the wing.

img_4647_s.jpg

Fuselage sides joined, doublers and tri pieces added. I made a mistake and put the short tri pieces at the top instead of the bottom, so added more to the top and left it at the bottom - can't see that it will do any harm.

More to follow...........GDB

25/01/2013 16:54:37

I've started the build and have been getting on quite well for the last few days.

First job make the necessary templates for the items to be cut from balsa - I didn't order any of the cut wood packs as I previously ordered wood from SLEC for 3 builds and included the Tucano.

img_4635_s.jpg

First items to cut the wings, and the first problem!

img_4634_s.jpg

The wing centre section is shown on the drawing at a tad over 4 inches wide, whereas the balsa from SLEC is 100mm wide. To compensate I added a couple of mm to the leading and trailing edges.

img_4636_s.jpg

Wing panels cut and ready for gluing.

img_4639_s.jpg

Inter-panels strips added and the wing panels glued together with CA.

I didn't register the comment by Nigel to fix the tips with epoxy until after I'd used CA, but they've stayed put so far, and unless they show signs of fragility I think I'll leave them alone.

I've decided that I will make the wing detachable for ease of storage and transportation. I've got the attachment scheme in my head and will add a section on it later.

More to follow.......... GDB

20/01/2013 17:37:30

Thanks Dylan.

Just been called to dinner, got to go or it'll be in the dog!

Will have a bash later.

Ta... GDB

20/01/2013 17:27:53

Hi, I signed up for the mass build and have now started building.

As I haven't built anything from balsa for about 45 years I decided not to plunge straight into the Tucano build, but thought I would get a bit of experience/practise on something else first.

I ended up building the Zulu ET which was featured in RCME October 2010. The Zulu is now complete and awaiting better weather for its maiden. Fingers crossed!

Having finished the Zulu I have turned my attention to the Tucano. I have to say that on first impressions it's a far simpler build than the Zulu (may live to regret that comment).

I made a start last night, making templates from the drawing and have made the wings today, ready for insertion of the landing gear plates and sanding to shape.

I'll start to include pictures of my progress if someone will point me in the direction of the instructions for placing photos in these posts.

Cheers for now....GDB

Thread: Friday free stuff
23/11/2012 09:25:00

Please count me in!

Thread: Zulu-ET
15/11/2012 15:55:08

Thanks for your prompt reply David.

No, I haven't enquired of the plans dept. as I'm just looking for possible contenders at the moment.

From your comment regarding back-issues, do I take it that if I ordered a back-issue it would come complete with the free plan? I had always assumed that would not be the case - don't know why really!

GDB

15/11/2012 14:04:50

In the October 2010 edition of RCME the featured plan was for Lindsay Todds' Zulu-ET, a high wing trainer type plane.

In the plans service I can only find Zulu-E, the low wing version featured in 2009.

Does anyone know if the plan for the ET variant available anywhere?

Thanks GDB

Thread: Tucano Signing Up Thread
07/11/2012 12:36:07

Yes, I'm in, so that's one more for the total.

GDB

Thread: Mass Build 2013 The Shortlist - time to vote!
06/10/2012 20:43:59

Thanks for the plan link WolstonFlyer.

When I search for Tucano all I get is this:

Search Results for - tucano

None of which refer to the plan - what am I doing wrong??

GDB

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