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BERGFALKE IV CABRIO 1:4.7 SCALE**

Let us all watch your new project progress.
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chris williams
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Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

Followed by the rudder: once again, the false LE is hinged up before construction commences...
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chris williams
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Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

Now the tailwheel assembly can be added, prior to ply-sheeting the rear of the fuselage...
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chris williams
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Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

Moving on now to the wings...using my current wing-build practice, the lower main spar is built over the plan. Once the upper spar is added, the ply webs are glued to the front of the spar and the sub-spar dropped in in front of them.
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chris williams
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Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

The second wing joiner sits between the sub spars: when fitting two joiner boxes like this, it's always prudent to insert the blades into the boxes to ensure that they are exactly parallel as the epoxy cures...
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chris williams
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Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

Once the lower sheeting has been added (not forgetting the ply plate to accept the rubber band retention hook) the wing can be placed on its jigging supports, weighed down and the top sheeting added...
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chris williams
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Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

Now the wing root can be finalised and lined with 0.8mm ply...
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chris williams
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Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

The wing root fairing on the fuselage is simply a 1.5mm ply profile: this is best made by offering up to the wing root and marking around. Also, it's best to leave the wing joiner boxes and incidence tube proud of the wing root up to this stage. This way, a ply blank can be pushed into the wing root with two layers of masking tape in the appropriate places. The resultant marks in the tape will show where to cut and drill, then, when you mark out the profile it will be accurate in relation to the protruding brass...
Once fitted, it was time to add the 6mm half-round dowel from my nearly diminished stock to simulate the metal tube of the full size. Then, at this stage, it was time for the obligatory test rig!
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Jus Gordon
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Joined: 19 Mar 2015, 02:36
Location: Wilts

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by Jus Gordon »

Hi Chris,

Another great build thread, will you be flying this at Whitesheet this weekend, weather permitting?
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chris williams
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Location: Blandford Dorset

Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by chris williams »

Of all the sad words of tongue & pen...'weather permitting' are the saddest... ;)
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Barry_Cole
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Re: BERGFALKE IV CABRIO 1:4.7 SCALE

Post by Barry_Cole »

Not looking good at present...

:roll: :roll: :roll: :roll:

BC
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