Fokker DVIII (oz12213)
About this Plan
Fokker DVIII. Radio control scale model WWI German parasol fighter. For electric power and 3 or channels (the wing is shown both with and without ailerons).
Note this plan bears the date (in the title block) of 2004. It was later published in Flying Scale Models, June 2012.
Update 8/5/2023: Added article, thanks to hlsat.
Quote: "Fokker D.VIII. A 1/8 scale electric powered model designed by Peter Rake with the prototype model built and described by Simon Uglow.
The Reinhold Platz designed 'Flying Razor', as it was nicknamed by allied pilots, arrived too late to have much impact on the outcome of the air battles of World War One. Originally designated E.V (that’s E.5), a series of fatal wing failures saw the parasol monoplane fighter temporarily withdrawn from service. After the problem was rectified - main spars having been found not to be to design specification - the Idflieg (German Air Command) ordered resumed production. Redesignated the D.VIII the Flying Razor went on to claim the last aerial victory of the Great War. A total of 289 E.Vs were manufactured from an initial order of 400 machines.
The Model: Peter’s model is to 1/8th scale, giving a wingspan of 42 in. At this size, the fully assembled model fits nicely into the back of your average family car. With excellent flying characteristics, this may just be the perfect electric scale park flyer.
Designed to use either three or four function controls, depending on which wing you build, I obtained a set of laser cut parts and construction was commenced on the three function version.
(Since this model was designed some time ago, I have updated the plan to show the option of a brushless 'bell' style out-runner motor in addition to the original brushed set-up. It simply requires a rectangular 1/8 ply firewall and spacers. This more closely resembles the arrangement Simon used. PR)
Tail surfaces: The tail feathers are quickly built over the plan from strip, the rudder receiving a laminated outline, of three strips of 1/16 x 1/8 balsa, formed around a foam board template. Laminating in this way produces a very strong but also light structure. Eminently suited to curves, the rudder as here, or wing and tail plane tips are easy to produce, so don’t be afraid at giving this technique a go. Foam board is ideal for producing the template. Take care to not cut to the full rudder size, but 3/16 under to allow for the balsa thickness.
Protect the edges of the template with Sellotape and pin securely to your building board with cling film beneath. Pre-cut your balsa strips and allow to soak thoroughly. You may use ammonia (purchased as Cloudy Ammonia from the cleaning section of your local supermarket) added to the water if you wish, but beware the smell and the irritant effect to eyes and nose. This is especially noticeable if you use hot water for the soaking.
Once nicely pliable, run each strip through a saucer of PVA glue to coat thoroughly. Now take your three strips, stack them and then, starting at one end, work your way around the template, pinning as you go. The laminates will slide over one another at this stage allowing for their different curve radii. I like to use a small strip of shim brass as a fence outside the laminates to help apply even pressure and prevent the pin indentations otherwise caused.
This detaches easily once all is dry. Several days are best here. Ply control horns are let into the control surfaces after covering, to allow hooking up to the closed loop controls (the plan shows pushrod operation, but closed loop is a simple upgrade).
Fuselage: The fuselage follows Peter’s preferred and well proven construction method: a forward fuselage box, mated to a stick built rear fuselage.
The rear fuselage is the standard build; two sides over the plan joined with these sides pinned directly over the plan. Cut the uprights for both sides when building the first and you are almost guaranteed two identical sides. Similarly so the cross pieces. Cut two of each, fitting the lower (pinned and therefore fixed) stations using the second between the top longerons for absolute squareness.
With the forward fuselage largely self-jigging using the precision of the laser cut parts, a few strategically placed supports allow this to be glued in one sitting. This is again accomplished over the plan view, on the building board, to ensure accuracy.
Once joined to the rear fuselage, a series of sub formers are added to accept the rolled balsa top decking and develop the fuselage shape.
Prior to adding the top sheeting, the centre section struts need forming. All the strut lengths are accurately shown and using 1/16 piano wire the bending work isn’t too arduous. The two upper struts are sewn and epoxied to 1/8 ply mounting plates. The lower strut is made a free fit into a piece of brass tube, securely boxed in on F1b. With the fuselage attachment points fixed, the wing attachment point can be soldered in situ.
Whilst you’re in the swing of things, you may as well shape the rear wing strut and undercarriage. These items are each sewn to further ply plates in the fuselage bottom..."
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(oz12213)
Fokker DVIII
by Peter Rake
from Flying Scale Models
June 2012
42in span
Scale Electric R/C Parasol Military Fighter
clean :)
all formers complete :)
got article :) -
Found online 08/05/2020 at:
https://www.rcgroups.com/forums/showpost.php?p=4445462...
Filesize: 153KB
Format: • PDFvector
Credit*: neons
Downloads: 2077
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