HABICHT QUARTER SCALE

Adam C · Post by **Adam C** » 10 Jan 2021, 08:34

Plan received, thanks cliff.

In an attempt to calm my nerves about incidence , I had a thought to add a cross piece between f8 and 9 on both side that has the anti rotation pin hole pre drilled during the build. You can thread a long pin through and check for squareness before planking. Wing incidence is then set and you adjust the stab to this. The fitting of the fuselage rib and fairing is therefore cosmetic and self aligning. I cant see the slight dihedral canter of the root rib causing a problem but welcome your thoughts on this.

I always though mk1 eyeball was ok until one day I put it to the test and found its hard to spot errors of up to 2-3 degrees on a curved and built model.

Post by **chris williams** » 11 Jan 2021, 10:17

(Can't resist it!) Should have gone to Specsavers

Post by **chris williams** » 11 Jan 2021, 12:21

A few more details, including the mighty lump of lead that was required! (In retrospect, the Schweyer version with the shorter nose might not have been the best choice)

Post by **chris williams** » 12 Jan 2021, 09:49

Now for some details of the fin fairing...

Post by **chris williams** » 13 Jan 2021, 09:44

The airframe is now ready for the process of covering & painting...

SedB · Post by **SedB** » 13 Jan 2021, 11:58

Looks stunning Chris! I hope you share some pics of the covering and painting process!!
Looking at the very small gap between the stabiliser and the elevator, I was wondering wether you used 'normal' pin type hinges, or are they temporarily fixed?

Dan

Post by **chris williams** » 14 Jan 2021, 10:00

The hinges are the usual Robart style pin hinges, which will be permanently fixed after the covering process..
My current preference for covering is to Solartex the fuselage and film the flying surfaces. (Strips of 'Tex ironed on in the appropriate places initially, will quite successfully simulate the joins in the plywood on the full-size) This helps preserve my stock of 'Tex, requires a lot less painting, is significantly cheaper, and a lot lighter, too. Concave and sharply curved convex areas are left open, with the edges of the 'Tex submerged under 2-pack primer. This is brushed on in six or seven coats. A light application of aerosol black will act as a guide coat, and the primer can be carefully taken down initially with 120 grit dry, on a block, followed by 320, which is fine enough to feather out the edges. From here I spray further 2 coats of primer over the whole of the fuselage, flatting down wet with 600 w & d paper. Then it's time to spray on the 2-pack top coat...

SedB · Post by **SedB** » 14 Jan 2021, 21:52

Thanks a lot for the explanation Chris, it's really helpful!!

Dan

Post by **chris williams** » 15 Jan 2021, 09:47

The flying surfaces are covered initially with HK's matt clear film, and then the colour trims added. It's entirely possible to apply the clear in separate panels with a 25mm overlap, provided you don't over-shrink with too much heat, as the edges will pull away. (Don't ask!)