Download "Making Identical Balsa Aeroplane Ribs - Das Ugly Stik - RC Model Aeroplane Build & Repair"

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3:41

cut out the slots in an identical location

3:53

cutting roughly around the ribs with a sharp exacto knife

8:37

cut this slot through all of them using my razor saw

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Das Ugly Stik

Stik

Ugly Stik

Planes

Balsa

Rc planes

Covering film

Shrinkable film

shrinkable covering

radio control

rc

free flight

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hi there I've just started to build this

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ugly stick it's a 16 inch wingspan and

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it's got 17 ribs now the ribs are all

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essentially the same size but there's

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three different variations that are

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shown on the plan and what I thought I'd

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do is a quick video showing how I

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produce identical ribs and introducing

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the variations that are needed for this

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build first thing we need to do is take

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a look at the ribs themselves okay so as

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I said we've got the three ribs which

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are all essentially the same size they

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have the same exactly the same profile

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the only variation comes within the

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thickness on this pattern here we need

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some 1 eights 3 mil or quarter-inch 6 6

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point 4 mil or on these we need quarter

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inch quarter inch and we need someone

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eights on that one the other variation

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as well as the thickness is to do with

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the slots for the spruce spars on these

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outer portion ribs on the X portions of

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the wings these ribs you have a single

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spruce bar top and bottom on the more

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central ones you have a doubler as well

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so it's twice as thick the portion that

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you need to take out so what we're going

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to do is we're going to produce 17

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identical ribs of different thicknesses

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and then we're going to cut out the

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slots that we need

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ok so I've chosen a single rib off the

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plan and I've cut that out stuck it to

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some three mil plywood and cut cutting

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out and the one I chose has got the the

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the markings for where the doubler goes

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as well as the the main spruce part so

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it shows the double width and what I've

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done is I've cut out the 3/16 for the

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sparse for front spars they're nice and

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tight fit

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I've also cut out the slot that

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accommodates the Spruce sparse there we

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go

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and eventually as I said that I will

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need to cut that out to accommodate the

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doubler but for now just that what I've

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done there is I've drawn around that on

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a piece of plywood cut it out fairly

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roughly oversize to produce a second

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identical rib what I'm now doing is

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bolting this together okay I've now

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bolted those together and I've got this

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oversized rib on the back bolted

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together with two mill bolts you'll hear

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me mixing my units mainly because the

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plans are in imperial and everything I

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get where I live is in metric whether

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it's bolts to mill bolts three mill ply

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or spruce six mill spruce bars so I'm

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needing to kind of work and convert

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between the two anyway so the next job

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is I'm going to send this to size so

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that this bigger one is identical to the

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one that I've already made I'm then

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going to cut out the slots in an

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identical location and so I've got my

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two identical ribs

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[Applause]

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okay well I'm now cutting roughly around

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the ribs with a sharp exacto knife just

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I mean the closer you go to this the

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less you'll have to sand off in the end

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but the more chance you've got of making

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a mistake I would prefer to leave a

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decent amount of balsa to sand off

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afterwards because at the end of the day

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it's a really simple process sending

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balsa so right so there we go we've got

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that got that template and I've got my

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other templates here I've got five of

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the quarter mil and I've got I should

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have twelve twelve of the three milk all

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the three sixteen so the next job with

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these is to make a sandwich and I'm

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going to bolt them all together using

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these just this threaded rod and some

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nuts and washers and with the plywood

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either side like that and then we'll

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send them together now the first time I

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ever tried to do this I tried to drill

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all the way through and expect it to

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come out in the right place and have

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everything lined up which didn't work

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very well if you've got a drill press

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and you can set them up nicely then yeah

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you could probably do that I'm going to

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take a slightly slower approach and I am

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going to drill each one individually

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I've marked on this rib which hasn't got

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a template at the top because it's

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important to know which is the top

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because they are not symmetrical so I'm

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placing the rib

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over this balsa one I'm drilling a hole

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making sure to leave enough clear space

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around and I pushing my two long

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threaded pieces of long threaded rod

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through keeping that a nice tight fit

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right so we'll put that there and top up

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now do the next one like I say it's a

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bit longer than doing it with that and a

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drill press if you've got one but I like

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this approach because I just feel it I

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can make sure that it's correct now this

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is the top that's the top so it goes on

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that way if we end up getting one the

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wrong way around when we come to do the

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sanding it you'll probably have one that

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doesn't fit there we go okay well I now

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have my my balsa sandwich I've drilled

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them all individually and and put them

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onto these threaded rods I do find that

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doing it individually okay it takes a

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little bit more time it probably took me

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10 minutes but I find it's a lot more

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accurate and I get better results than

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trying to to do a number of different

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ones now I haven't put these in any old order

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I put them in a specific order all these

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ones at this end including these two

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quarter inch or six point four mil here

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so up to that point they're always have

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that size slot for the single

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the single spar width from there onwards

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so this lot I will need to cut out that

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again to make it thick enough for the

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double spar

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so I'm going to sand these two shape now

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I just need to make sure it's all square

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tighten it up I'm going to sand these

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two shape I might use a knife just to

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take off the the odd high bit first and

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then I'm going to cut this slot through

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all of them using my razor saw so that

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the so that the spa fits through all of

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them nicely and same there and there's

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ten mil balsa to go in the front or 3/8

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square and then once I've done that I'm

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going to take off these these first few

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ribs up to that point which are then

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finished and I will clamp this back up

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in the sandwich and I will cut out that

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to the thicker dimension so I'll get on

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and do that now and we'll come back in a

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bit I thought I'd say just a quick word

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on how I'm getting these down to size

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initially I'm using my David plane which

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is ideal for this and if you do it at an

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angle like that it'll pick up the

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plywood either side so I'm getting the

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gross shape using the plane these baby

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planes are fantastic if you check out my

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playlist on my youtube channel you'll

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see I've done a review of these but once

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I've got down close I don't want to go

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too close because I might end up taking

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off some of the plywood I will then be

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going across and sanding like this to do

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the final

00:10:07

the final shaping so okay but I've spent

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quite a lot of time now sanding these

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seventeen blanks that I've got

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sandwiched between my two plywood

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templates three mil plywood templates

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and it's it's really rewarding when you

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get this lovely smooth finish it's it's

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it's a really nice a nice job it's

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create scarred work but it's nice at the

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end here where it steps down to take

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some sheeting at the trailing edge I

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just check that correct depth so that

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fits nice and smooth there

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the initial edge of that I just did a

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cut with my razor saw first to get a

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nice straight edge this is a 42 42 teeth

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per inch saw so that's that's nice to do

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and the we've got the the slots for the

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central spruce spars and we've got five

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mil or 3/16 boss wood Sparsit go in the

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front and to do those I just prop it on

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a piece of scrap balsa wood and I run my

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saw down either side of the either side

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of the slot and then I won't try and

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take this out now while they're all

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sandwiched together I will once I've

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taken this apart

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I will individually go and just Nick out

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Nick out that with a sharp scalpel and

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that will that will come out quite

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nicely these should be quite a tight fit

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it's the way I made it with the template

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and they may need just the slight

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sanding or a slight shave taken off but

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I I'd rather make them slightly tight

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then end up with them being a bit loose

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because then they're they're no good to

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anybody this is probably the hardest cut

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in the front of the front of the rib

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which takes the the 10 mil leading edge

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mainly because okay you can prop it up

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and you can hold it but it's quite hard

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to get to get that angle right so I I

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cut it quite generously and

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just sanded it to shape so so I as I

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said previously I've got my seventeen

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blanks in the middle although not really

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looking like blanks anymore

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and ten of those are more or less

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finished once I've taken out these these

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pieces but there's seven which I will

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then need to cut out with my razor sore

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again to take this this doubler that

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goes on there on the spruce central

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spars so just to wrap this video up the

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the ribs are not symmetrical so as I

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take them off I put a to to indicate the

00:13:02

top and as I said previously I'm just

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going to use my scalpel

00:13:07

just to Nick out these there we go that

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is probably a little bit too tight so I

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will just take off the little shading

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off the back edge and as long as I'm

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consistent

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rather than taking some off the backs

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some off the front I can then fine tune

00:13:35

each rib to make sure it's a perfect fit

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so that's how I make seventeen

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individual ribs identical and I'm not

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saying this is how you should do it I'm

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not saying this is the best way of doing

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it it's just the method that works for

00:13:53

me that I quite like there's lots of

00:13:55

ways of making ribs but I just thought

00:13:57

I'd share with you how I things what I

00:14:00

think is a good idea

Description:

A short video showing how I make 17 identical ribs for my radio controlled balsa aeroplane, a Das Ugly Stik. I appreciate this nothing new, but thought some may find it interesting and useful, its a great technique that works well for me. https://www.youtube.com/playlist?list=PLGILJsUw3dvRV_vh2MAe0VBraPhvk7KEQ Below is a link to further build videos of my Das Ugly Stik, please follow and I hope you will enjoy - https://www.youtube.com/playlist?list=PLGILJsUw3dvRV_vh2MAe0VBraPhvk7KEQ

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