Jump to content

Hammerhead 620 kit build


Recommended Posts

Bolt the wing to the fuselage, now make up the wing bolt cover by laying a straight edge on the wing so that it is flat up against the fuselage side. Now using Zap thin tack each of the cover sides in place when happy run Zap along all of the joints. Now measure 15mm from the cover sides and draw a line, this is where the balsa skin will start. mark and trim the 1/8" balsa sheet and glue them in place, remember to leave a four millimetre over hang at the trailing edge. Sand the 1/8" balsa sheet until it is almost flush with the wing, then apply some lightweight filler for blend the cover into the wing.

place some masking tape on the wing along each side of the cover to prevent your sanding block from marking the wing whilst to sand the edges of the cover flat. sand the overhang, cut some 12mm holes over the wing bolts. that's the wing just about done.

20161228_221408[1].jpg

20161228_221742[1].jpg

20161228_222203[1].jpg

20161228_222330[1].jpg

20161228_224401[1].jpg

20161228_224435[1].jpg

20161228_224524[1].jpg

20161228_224724[1].jpg

20161228_225435[1].jpg

20161229_004545[1].jpg

20161229_005959[1].jpg

20161229_144738[1].jpg

20161229_144806[1].jpg

20161229_185831[1].jpg

20161229_190807[1].jpg

20161229_191043[1].jpg

20161229_191435[1].jpg

20161229_191949[1].jpg

Link to comment
Share on other sites

Advert


Now I can attach the tail-plane and fin. Draw a centre line on the tail-plane, then mark the centre of the rear deck former and the rear fuselage post. Position the tail-plane on its seat lining up the centre line with the marks on the fuselage. Now looking from the rear check that that the tail-plane is level with the wing. Glue the tail-plane in place and leave to dry. when dry glue the fin in place making sure that it is vertical. When dry, glue the two rear fairings you made earlier in place, run Zap thing along all joints then lave to dry.

20170104_113241.jpg

20170104_113520.jpg

20170104_113702.jpg

20170104_114831.jpg

20170104_115010.jpg

20170104_115232.jpg

Link to comment
Share on other sites

I chose a simple black and yellow checkerboard design for the cowl. Cut out all of the necessary holes require to clear the engine installation, then rub down the cowl with 600 wet and dry (wet), Draw the design on to the cowl then give it two coats of yellow, when dry mask off the areas that are to remain yellow and give it two coats of black. when dry remove all of the masking and rub the cowl down with 2800 wet and dry (wet) clean then allow the cowl to completely dry, then apply two coats of clear lacquer. now fit the cowl as per the instruction manual.

20170104_155102[1].jpg

20170104_161221[1].jpg

20170104_203042[1].jpg

20170104_204832[1].jpg

20170104_215844[1].jpg

20170105_111240[1].jpg

20170105_112304[1].jpg

20170105_130127[1].jpg

20170105_131048[1].jpg

20170105_131059[1].jpg

20170105_131649[1].jpg

20170105_131656[1].jpg

20170105_132310[1].jpg

Link to comment
Share on other sites

Install the aileron servos, you will need an extension lead for each servo and a y-lead to join them. Stick some servo tape to the servo hatch (don't remove the plastic cover off the servo tape at this stage as you will need to remove the servos when covering the hatch) position the servos over the servo tape and drill pilot holes for the servo screws and screw the servos in place then attach the extension leads. Now cut two holes in the wing where the servo leads will exit into the fuselage.

Using a long piece of plastic tube (I use the outer sleeve from Bowden cable) or similar. feed it through the two holes you have just made. When it is through, tape the end of the extension lead to the cable and pull it through the wing and out of the holes. attach your y-lead ready for plugging into your receiver.

Mark the position of the control horn, drill pilot holes then fit to the aileron. Now make up the linkage from the M2 threaded rod, clevis and fastener. I prefer little stubby linkages, if you like longer linkages install the servo cover with the servo arm at the top.

20170105_222513[1].jpg

20170105_223554[1].jpg

20170105_224324[1].jpg

20170105_224330[1].jpg

20170105_224508[1].jpg

20170105_224611[1].jpg

20170105_224953[1].jpg

20170105_225425[1].jpg

20170106_115542[1].jpg

Link to comment
Share on other sites

Ok this is the last job on the build before I strip everything out of the model and prepare it for covering. Cut and bend the tail-wheel piano wire as show in the instruction manual, make a small U shape from the offcut to use as an anchor for the rubber band that will connect the rudder to the tail-wheel. Drill pilot holes in the tail-wheel mount then position it into the slot and screw in place.

Next filling and sanding, then onto the job I despise most of all COVERING but that's just because I suck at it lol.

20170127_191254[1].jpg

20170127_191550[1].jpg

20170127_191845[1].jpg

20170127_192101[1].jpg

Link to comment
Share on other sites

Fuel proofing the tank box and bulkhead. You can use a commercially available fuel proofer of your choice. I prefer to use laminating epoxy to do the job. First tape off the captive nuts so that you avoid getting epoxy into any of the threads, tape up both sides of the captive nuts. Mix up some laminating epoxy and apply an even coat inside the tank box, bulkhead, front former and outside the tank box. Remove the tape from the captive nuts and leave over night to cure before Sanding smooth.

I will start the covering tomorrow, unless I can think of anything else that I can use as an excuse to put it off lol.

20170129_122119.jpg

20170129_122222.jpg

20170129_122308.jpg

20170129_122517.jpg

20170129_122602.jpg

20170129_123324.jpg

20170129_123408.jpg

20170129_123648.jpg

Link to comment
Share on other sites

Richard, this is a great tutorial. So Ithought it would be interesting to see what the kit costs but there seems to be no info in this thread. So a Google search for your website seems the next step.........but Google comes up with a site which says " Problem- please contact Support"

so I fear you are losing the chance to have people contact you and actually buy!

Link to comment
Share on other sites

Posted by kc on 29/01/2017 15:29:31:

Richard, this is a great tutorial. So Ithought it would be interesting to see what the kit costs but there seems to be no info in this thread. So a Google search for your website seems the next step.........but Google comes up with a site which says " Problem- please contact Support"

so I fear you are losing the chance to have people contact you and actually buy!

Thanks kc I have thoroughly enjoyed doing it. I purposely left the price off here because. One I am hoping people will use this as a visual aid to help with building my kits and two, though I hope this will generate some interest in my kits. I don't want to anyone to think that I an blatantly using the forum to sell them.

As for my website, I made the decision to get my website professionally designed sometime ago and even from the first viewing I could see that my new site really made my poor attempt at website design look so bad, that I decided to shut my old site down in the hope that no one would remember it lol. My new website will be going live in a matter of days, just as soon as I get to view and have a little play with it so I can make sure I am happy with it before giving my Web designer the nod.

Cheers

Richie

 

Edited By Richie Carey Maddog Designs UK on 31/01/2017 09:38:49

Link to comment
Share on other sites

Well I eventually ran out of excuses not to start the covering so here we go. I wont go into a full this is how you cover a model. simply because I suck at it and it would show lol. I will only touch on the bits some of you may not have tried before or even heard of. Top hinging the ailerons using the covering as the hinge. It is really easy to do, easier than conventional hinging in my view.

First cover the ends of the aileron, then iron the covering to the bottom of the aileron then up the leading edge, leaving enough covering film to cover the wing trailing edge. Tape the aileron to the wing making sure that the tip of the aileron and wing match and that there is sufficient gap between the aileron root and wing for the aileron to move freely.

Fold the aileron over until it is resting on top of the wing, now iron the covering film to the wing trailing edge. Then cover the bottom of the wing as you would normally. The top hinge is finished off when you apply the top covering which I will show later.

20170129_175524.jpg

20170129_180332.jpg

20170129_180353.jpg

20170129_180739.jpg

20170129_180954.jpg

20170129_181004.jpg

20170129_181200.jpg

20170129_181206.jpg

20170129_181707.jpg

20170129_183555.jpg

20170129_190739.jpg

20170129_190745.jpg

20170129_190751.jpg

Link to comment
Share on other sites

Posted by Gary Fentiman on 31/01/2017 11:48:45:

Looks great can't wait to see it finished and maybe buy one

Thanks Gary, that's like music to my ears. I doesn't matter how much work you put into designing a model, there is always some trepidation about how others will view it. thanks again for that comment, its a real boost to my confidence wink.

Richie

Link to comment
Share on other sites

Now fit the other aileron in the same way. Remove the tape holding the ailerons in place and cover the top surface of the wing. Cover the aileron last ensuring that it is in the down position when sticking the film to it. That's the wing complete. just waiting for delivery of the vinyl flame decals now.

Covering the fuselage tomorrow. I'm off to the gym now for some rest lol.

20170131_144059[1].jpg

20170131_144317[1].jpg

20170131_144551[1].jpg

20170131_154330[1].jpg

20170131_173040[1].jpg

20170131_173046[1].jpg

20170131_180517[1].jpg

20170131_180501[1].jpg

Link to comment
Share on other sites

Posted by john stones 1 on 31/01/2017 19:21:24:

Excellent blog Richie yes

Been following along, no one who's rubbish at covering, hinges with it nor uses dark colours, so i reckon you tell porkies or you're just being modest. wink

John

Cheers John, well I know how to do it lol it's just one of those jobs I don't like doing. There's nothing more irritating than doing a first class job covering the bottom of the model, no creases or gaps. Then mess up the top or worse run out of covering as I have just done. I only have both sides of the fin to cover but now I have to wait for a two meter roll of carbon effect Oricover to arrive 😡 I'd much rather spend a couple of days adding rivet details to a scale model lol

Richie

Link to comment
Share on other sites

Still no sign of the carbon effect Oricover. Never mind, there are still jobs I can do. Using Zap thin, glue the Mylar hinges to the elevators, then to the tail plane. Next fit the elevator control horns (I always trim the execs plastic thread, leaving just enough so you can melt it over the nut with a soldering iron to lock it in place) attach the pushrod and adjust as necessary.

Remove the plastic backing from the servo tape and screw the aileron servos in place. fit the linkages and adjust to achieve the required throws as stated in the instruction manual.

Bolt the engine and its mount to the firewall, this is the final engine installation so this time use loctite or similar on all nuts and bolts. Remember to add the stated amount of side and down thrust.

20170202_142154[1].jpg

20170202_142225[1].jpg

20170202_142728[1].jpg

20170202_143705[1].jpg

20170202_145718[1].jpg

20170202_151014[1].jpg

20170203_115434[1].jpg

20170203_120937[1].jpg

20170203_121003[1].jpg

20170203_122514[1].jpg

20170203_132744[1].jpg

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...