1/10th scale Blackburn Beverley.

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MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » December 30th, 2014, 5:35 pm

It certainly took a good couple of days to do the gluing up, and not without the dramas! In previous posts, I mentioned "cock ups"! I was advised that these are in fact learning experiences? This does not apply to the cock up I made yesterday, It was as bad as it gets. I got as far as setting up the pre glued nose section in preparation to fix it permanently to the fuselage, this has to be done with care, doesn't it! Everything fitted in the right place, everything lined up very well, except that the datum line, that where the cockpit section will mate to the fuselage, was dipping at the nose end. I decided that the top joints were too long, this had to be the problem, so I decided to hack off about 1/4 inch to eradicate the dip, I did this and so out comes the glue, clamped up and had a cuppa. About an hour later I noticed that the datum line was sticking up in the air instead of drooping as it was a little earlier. It was clear that I should not have hacked off the 1/4 inch. I had to un-stick the top joints which I managed with a wide chisel eased into the joint. This worked without any damage, but not without model makers rhetoric? The frames lined up very nicely all on their own, so I glued up and all is well. This morning I had to make some repairs to the area, added in some slivers and an extra brace. Thankfully there is no permanent problem from this. But it was a cock up, not a learning experience! Why was the damn thing dipping when I trial fitted it?

Most of my time today was spent poncing about with bits and pieces, preparing to fit the nose wheel mounting. There are a couple of unknowns regarding the nose wheel, such as where to fit the steering servo. It will be all too obvious at a later date?

The advantage of gluing up is that the model can be stood on its back end for attending to the nose wheel and other front end bits. It's going to be very handy for shaping the front frames in preparation for the eventual skin application.

I have a few areas of sorting out to do on some joints. There are a couple that need a piece of wood inserting on one side to make them tight. These are on frame No. B3 which if you recall was originally the B4 frame that was scrapped because of these joint errors, and re-cut to make B3. This will not compromise the strength of the framing.

The plan now is to do all the fiddly bits now the gluing up is done, fit the Starboard side No. 1 aerofoil to line up with the Port side already fitted, and attend to the filling of the joint slots that are there to slide the aerofoil into its position. Once I am happy that the two No. 1 aerofoils are balanced, then I will be able to fit and line up the remaining aerofoils with relative ease! The basic, main nose wheel mount will also be fitted before progressing onto the removable cockpit section. This is essential to progress the frame shaping as the fuselage and the cockpit sections need to be worked together to obtain the correct shaping. I would like the joint between the two to be as unnoticeable if possible? Then when the cockpit section is in its basic framed structure, I will then need to start on the rear section of the fuselage, another five foot lump!
Attachments
PC300007.JPG
Working height?
PC300007.JPG (166.92 KiB) Viewed 10306 times

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » December 31st, 2014, 5:08 pm

This was another one of those days being busy and seeming to get nothing done. Loads of little bits and pieces are now sorted, loads more to go!

The main feature today was to start on the nose wheel mounting. So far there are two layers of 9mm ply, the second just clamped up as you can see. I reckon I will need two more layers of this making the total 36mm. This will be drilled out to accommodate a 1/2 inch brass spindle in a brass sleeve. The hope is that this will provide the steering and suspension functions? I am happy to be advised on alternative (better) materials for the nose wheel set up?

Both of the No. 1 aerofoils are now fitted and glued in, along with the filling of the location slots for these frames. It is starting to come together.

I may have to make a small adjustment to the datum longeron on the starboard side. There seems to be a slight hump. I will carefully check the squareness etc and see what needs to be done. Nothing too dramatic, perhaps the easing of a couple of joints and removing a small amount of material, nothing I cannot handle.

May I take this opportunity to wish all my fellow modellers a very happy and prosperous new year. Happy landings!
Attachments
PC310007.JPG
Nose wheel mounts going in.
PC310007.JPG (150.75 KiB) Viewed 10242 times
PC310009.JPG
Both No. 1 aerofoils fitted and nogged.
PC310009.JPG (168.87 KiB) Viewed 10242 times

Chris Lane
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Re: 1/10th scale Blackburn Beverley.

Postby Chris Lane » December 31st, 2014, 7:14 pm

Malcolm - running brass on brass is not advised. Brass is heavy and hard but not tough and wears quickly. I recommend making both parts in steel but with a thin bronze bush pressed into the bearing hole. The steel shaft will then turn freely without risk of binding and the bronze has the requisite toughness for less-than-perfect landing knocks. This is the axle bearing set-up of choice for the model loco builders! Chris

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 1st, 2015, 5:29 pm

Thank you Chris for the advice. I will certainly use this idea. This material is also used in real steam locomotives, as well as white metal bearings on some older locos.

This new years day was another busy one for me and the Beverley, again not a lot to show for the effort. I did a bit more to the nose wheel area and inserted some more gussets at the back end, as well as messing about with tiny detail here and there. I made the front datum longeron for the cockpit section, in essence the same as the mating part on the fuselage. I made the patterns for the frames associated with the cockpit section, this time using cardboard from corn flake packets. The first pattern you can see has six frames marked on it. I will make the biggest, then trim it to make each subsequent smaller frame. Most of the final shaping will be done in situ by clamping the two parts together and using sanding sticks to do the shaping.

My original idea of making this as a monocoque structure to provide rigidity still stands, but I will also now include some longitudinal diagonal braces in areas where I feel this necessary. I am concerned that the front half of this structure will tend to droop a little. I need to be sure that it is square prior to gluing on the skin. I have a good idea where to place the braces, but will do some more thinking about this first. I have a supply of 1/4 x 3/8 inch spruce, so will use this as braces, but cannot really do this until I have finished clamping bits onto the nose wheel area, the weight of the clamps will otherwise hamper this effort!

The cockpit section construction will need to wait until the bracing is done to ensure squareness. I also still have the remaining aerofoils to fit, as well as the main undercarriage load bearing components to install.
Attachments
P1010007.JPG
More patterns.
P1010007.JPG (152.71 KiB) Viewed 10161 times

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 2nd, 2015, 5:21 pm

Another busy day, I seem to have done a million little bits and pieces. The important jobs were the installation of a load of diagonal braces which has squared up the fuselage very well, it is now very ridged, and installing a stiffener between the tops of frames D1 and D2. Having fixed the diagonals, I then straightened up the Starboard side datum longeron by separating about four joints and removing a small amount of wood underneath, (a very tedious operation) and re-gluing. The net result is a much better line on the front end, but there is still a very slight dip in the nose area, not too bad thankfully. I have decided not to fiddle with this any more and match the error in the removable cockpit section. If I hadn't told you, I doubt you would have noticed!

I will be taking time out of the workshop this weekend as tomorrow we are off to the theatre to see "Top Hat", lunch out and all that stuff, should be a good day out! On Sunday we have a bevy of grandsons to dinner, three to be precise. One of these boys works for Virgin, so I hope to get the real low down on the undercarriage failure? On Monday the Christmas dismantling will need to be done, I hope to find some more time to 'do the Beverley' after that? Watch this space???
Attachments
P1020009.JPG
Lots of diagonal braces.
P1020009.JPG (164.46 KiB) Viewed 10076 times

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 5th, 2015, 5:10 pm

Lots to see from today's efforts! The cardboard patterns came into their own making the cockpit bits. As ever, I couldn't resist this dry run, but these are useful as they show the adjustments that are required to make it all fit properly. Still a few more parts to make, but these will be worked out from the assembly rather than from the drawing. Now that I have done this dry assembly, the shape of the aircraft is becoming more apparent. Very pleasing!
Attachments
P1050007.JPG
More progress.
P1050007.JPG (200.1 KiB) Viewed 9980 times

stuart knowles 1611
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Re: 1/10th scale Blackburn Beverley.

Postby stuart knowles 1611 » January 5th, 2015, 10:59 pm

This is coming together really well. Good work Malcolm!

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 6th, 2015, 4:58 pm

I have been very busy all day messing about getting the parts to fit together nice and easy. There are a couple of longereons added to stiffen the frames, and the cockpit area has some bits added to assess the correct set up there. This is being done with the aid of photographs and trial and error. The probability is that I will re-make some bits, glue bits on, shape them, cut them off again, glue more bits on etc, until it come right. Thankfully, the cockpit parts are not important in the structure of the model, but do have significance to the appearance of the model, so must be as correct as possible. I will not be using any kind of "glass", but will use grey paint of some shade or other to represent the windows. Perhaps I will slightly recess the windows to give them definition, this is all BS for the latter stages of finishing? Not too sure when I will be ready to glue up the cockpit section, maybe later in the week?

I am also still thinking about bracing of the fuselage in addition to that already installed. I will assess the most likely areas of stress, and bung in a few more struts, just in case?
Attachments
P1060008.JPG
Not a lot more to see?
P1060008.JPG (150.54 KiB) Viewed 9859 times

Steve Rickett 2333
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Joined: May 13th, 2009, 8:18 am
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Re: 1/10th scale Blackburn Beverley.

Postby Steve Rickett 2333 » January 6th, 2015, 5:52 pm

Hi Malcolm,

Looking good so far. You're certainly putting a lot of time and effort into the project, and quite rightly so!! But why no windows? The cockpit is a bit like the airplanes eyes....and will the first thing people see when they view the model. You don't need to go to the effort of a fully detailed cockpit but it would be really nice to be able to see through the cockpit and perhaps have a couple of faces staring back?! Acetate sheet of about 1 or 1.5mm thickness will do the job on what are relatively small windows.

It's hard to assess how stiff the structure is through photos alone, but I bet you'll be very surprised how strong the structure becomes when it's sheeted. I'm guessing you're going to use 1/8" balsa partially sheeted, partially planked?

Weight is usually your enemy, so if you can avoid it I would advise to not add things 'just in case'. These things have a tendency to just end up just supporting themselves!

Looking forward to the next instalment!

Cheers

Steve
Last edited by Steve Rickett 2333 on January 7th, 2015, 8:03 am, edited 1 time in total.

Dave Hayfield
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Re: 1/10th scale Blackburn Beverley.

Postby Dave Hayfield » January 7th, 2015, 12:51 am

Hi Malcolm, noticed in one of your posts about constructing the nose leg gear. I have successfully fettled extreemly robust units using the gas struts from hatchback cars. Dis-assemble the strut to release the gas pressure etc. and you are left with a rod in a tube with an end which has a strong fixing. The rod rotates freely in the tube and is around 1/2 inch diameter. I fitted springs as shock absorbers at the top of the unit and it all works very well. Hope this may be of help but probably too late now !
Thanet Model Flying Club
LMA 520

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 7th, 2015, 4:57 pm

Thank you Steve and Dave for your helpful advice. Steve, with regard to more braces, I am concerned about the possibility (or is it probability) of a wheelbarrow landing. I need to be sure that the nose wheel area is supported, just in case!

Dave, I will be looking into your very helpful suggestion re the gas struts, almost ready made bits?

I decided today that it would be better to get the removable cockpit section glued up so that I can progress the actual cockpit windows etc, much easier on a stable structure, there will be lots of trial and error to get this correct?

I also finished preparing the F1 frame that I cut some weeks back. This is the main supporting frame for the rear half of the fuselage. I seem to be quite good at cock ups, I made one of these on the F1 frame, but have started to put that right. I will need to put a bar glued right across the frame to support the weight of the rear fuselage, this will be one of several support bars in various places. I will endeavour to explain all this when I make the rear end, it will be easier to explain with photos?
Attachments
P1070008.JPG
More progress.
P1070008.JPG (154.29 KiB) Viewed 9703 times

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 8th, 2015, 5:27 pm

Managed several little things today, including gluing the wing root aerofoils in place. I also made the trailing edge stiffeners from lite ply. The worst part of this is feathering the edges to fit reasonably well to accept a layer of 1./8th balsa skin on top of this eventually, which also will need feathering. There are a few complications in this area as the back end of the fuselage has to mate with a fairing that starts in front of the trailing edges and goes along the boom for about 3/4 of its length. At the point where this fairing meets the wing, the balsa skin will be cut at an angle to suit the curve of the fairing as it diminishes forward at the junction of the wing and fuselage. I accept that this description is as clear as mud, but all will become clear in the fullness of time.

When I have finished fiddling with the trailing edges tomorrow, and some little jobs on the cockpit set up, I will be turning my attention to the rear half of the fuselage. I have included a couple of pictures of my drawings to give you some idea of the relative complications of this structure, nothing I cannot handle, but a lot of bad language will be on the cards no doubt? You will notice on this drawing that the original idea for the F1 frame was to fabricate it, not really a good idea considering the job it has to do. The solid one I made from 6mm ply is the better option! I obtain my curves by using a grid system and a flexible curve, a very useful bit of kit!
Attachments
P1080013.JPG
Wing root aerofoils fitted.
P1080013.JPG (163.48 KiB) Viewed 9633 times
P1080008.JPG
Back end elevation.
P1080008.JPG (166.25 KiB) Viewed 9633 times
P1080010.JPG
Plan and sections.
P1080010.JPG (162.19 KiB) Viewed 9633 times

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 10th, 2015, 7:34 pm

Been very busy this last couple of days. Firstly I made a couple of patterns from my stock of packing ply and then today proceeded to make the frames from them. As you can see, I then did the basic set up for the rear end. This did not go without some colourful language, but thankfully it seems to have ended up OK! The frames you can see are made from birch ply, being the main formers for the cam shell doors, the rest will be made from lite ply.

A lot of the time yesterday was spent looking at the drawings and thinking through the procedure, even then, today lots of that went out of the window, and thinking on my feet kicked in! I have a couple of other pieces to glue on in the morning, keep the old fingers crossed that it goes OK?
Attachments
P1100008.JPG
New bits!
P1100008.JPG (166.49 KiB) Viewed 9545 times
P1100013.JPG
Setting up the back end.
P1100013.JPG (147.81 KiB) Viewed 9545 times

Dave Hayfield
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Re: 1/10th scale Blackburn Beverley.

Postby Dave Hayfield » January 11th, 2015, 12:49 pm

Hi Malcolm, I'm sorry to say this but I feel quite demoralised and inadequate! You have been carving wood for some considerable time now and your workshop looks much too clean and free from shavings. I make a mess putting an 'almost ready to fly' model together. Congratulations on being so orderly.
Thanet Model Flying Club
LMA 520

ian redshaw
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Re: 1/10th scale Blackburn Beverley.

Postby ian redshaw » January 11th, 2015, 5:00 pm

Its nice to see the shape emerging! It's looking a treat, all your planning and patience is coming to the fore. Top job!!

Ian.

ps. agreed, make some mess at once!

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 11th, 2015, 5:21 pm

I try not to be untidy. I am constantly clearing up, put my tools away, sweep up and have a clear bench for the next operation. Even so, occasionally, I find that everything seems to be in the way, this causes bad language and a tidy up is essential. It's better for the nerves and blood pressure this way! The broom is always handy and it takes only a few seconds to sweep the dust and offcuts away. I never leave an untidy workshop at the end of the day!

The first picture show the bench when I was sorting through some offcuts to make the smaller frames this morning. The next shows the band saw ready to cut some curves. I used some corn flake boxes to make the patterns, as you can see from the next picture there are some patterns and frames together. I seems to me that the shape transition from frame 4 to 6 is not correct? The No. 5 needs to be adjusted a bit. This can be seen in the last picture where I have dry fitted the No. 5 to show this. What do you guys think?
Attachments
P1110014.JPG
Mess!
P1110014.JPG (146.88 KiB) Viewed 9453 times
P1110017.JPG
Mess and band saw.
P1110017.JPG (169.48 KiB) Viewed 9453 times
P1110018.JPG
Things that cause the mess.
P1110018.JPG (160.14 KiB) Viewed 9453 times
P1110019.JPG
The reason for making the bits that make the mess????
P1110019.JPG (134.49 KiB) Viewed 9453 times

ian redshaw
Posts: 217
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Re: 1/10th scale Blackburn Beverley.

Postby ian redshaw » January 11th, 2015, 6:07 pm

It looks to me like frame 6 is the one that needs more shape to it? Perhaps with a slimming down of 5's curves to make it flow?

Ian.

Alan Cantwell 1131
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Re: 1/10th scale Blackburn Beverley.

Postby Alan Cantwell 1131 » January 11th, 2015, 7:48 pm

It looks like a boat hull shape, would the planking be a tad concave?

MalcolmDouglasPorter

Re: 1/10th scale Blackburn Beverley.

Postby MalcolmDouglasPorter » January 12th, 2015, 6:22 pm

It was one of "those days" today, if there was anything that could go wrong, it went wrong! Shouting and swearing at a model aeroplane does not help! Grrrr!

However, Ian, you analogy of frame Fd6 being at fault was spot on. It caused me to take a long hard look at the compound curves and make some adjustments. Having got that about right, I now notice other "cock ups" that need attention. Perhaps now I'm beginning to understand why some people build from kits?
Attachments
P1120022.JPG
Not as good as I wanted it to be!
P1120022.JPG (142.35 KiB) Viewed 9330 times

Alan Cantwell 1131
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Re: 1/10th scale Blackburn Beverley.

Postby Alan Cantwell 1131 » January 12th, 2015, 8:09 pm

image.jpg
image.jpg (73.72 KiB) Viewed 9311 times


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