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SF33 1/6 scale

Fans and Thermals.
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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

Now with the rear turtle deck fitted & ready to move on to fitting the forward part.
Attachments
Rear turtle deck
Rear turtle deck

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

Tailplane & rudder framework made up from 1/4" sq balsa, with additional 1/4" sheet infill as necessary.
It is only possible to make up the fin framework once these parts are clear of the board as the tailplane drawing overlaps the fin structure!
Attachments
Tailplane_Rudder framework
Tailplane_Rudder framework

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

Tail feathers now built and ready to add the control horns/make the upper/rear fuselage fairing.
Attachments
Tail frames complete.jpg

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

At the front end, the fuselage top has been skinned after making a simple framework for a removeable cowl.
Both sides of the cowl /fuselage interface were protected with a gloss masking tape to aid later removal & the joint line maked on the fusealge to aid placement of a scalpel blade to run around the joint later.
Everything went to plan & the cowl was easily removed once the glue had set.
The photos below show the cowl fitting ok with the motor in place.
The internal cowl framework can be seen on the 2nd pic.
Attachments
Front cowl on
Front cowl on
Cowl internal framework
Cowl internal framework

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

Canopy frame built from Liteply, with solid front & rear plus side rails to leave a space in the middle for a drop-in unit to be added for cockpit detail.
Attachment is a peg at front and a registration lip + small magnet at the rear.
Attachments
Canopy frame in place
Canopy frame in place
Frame showing attachments
Frame showing attachments

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

Moving on to the first wing, this is built up on the bottom spar with outer TE packed up to give 5mm washout over the aileron length.
The plan shows the 5mm TE glued directly to the rear of each rib, but I added a 6mm wide strip of 1/16" balsa sheet under the rear of each rib (same thickness as balsa skin/cap strips to be added later) and then added further 1/16" balsa strips between each rib. Once a further 6mm wide strip is added to the top, this will give a more solid edge to secure the TE.
The top spar, joiner tubes, angled root sub-spar and balsa dummy LE have also been fitted, plus upper aileron hinge spars, so this panel is nearly ready to have the top skin fitted.
Most of the internal details (servos, joiner tube area webbing, main spar webbing etc. will be fitted once the top skin is in place.
Attachments
Wing structure
Wing structure
Wing root area
Wing root area

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

A bit more progress over the last couple of weeks in that the top D box skin and most of the spar webbing is in place, together with the upper aileron spars & top skin.
A note here that although the plan calls for 3mm square balsa aileron spars, I have only fitted the upper ones so far as the notches need to be cut in situ as the plan doesn't show any slots on the rib templates. I also decided that as the top spars left little 'meat' on the ribs, I would leave the lower spar slots until the aileron area had top skin support.
Also, with the upper 1/16 balsa strip fitted across the rear of the rib, the 15mm wide TE strips could be added (inboard & outboard of the aileron break).
The remaining spar webbing has now been added, so the remaining upper skins can be added at the root end and the TE strips profiled to section.
The aileron & spoiler servo cables need to be added before the route is covered up by the lower D box skin.
Attachments
Wing top D Box.jpg
Wing_Top D Box sheeted.jpg
Wing root.jpg

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

With the 15mm wide TE strip added, spar webbing complete (including the angled spars), the upper root end skins have been fitted.
Next jobs are to fit the spoiler arrangement and servos prior to adding the lower D box skin.
Attachments
Upper root end skin
Upper root end skin
Last edited by Peter Balcombe on 14 Dec 2018, 07:23, edited 1 time in total.

Tonyw51
Posts: 13
Joined: 12 Dec 2018, 10:57
Location: Melbourne, Australia

Re: SF33 1/6 scale

Post by Tonyw51 »

G'day Peter,
I have just today received my e plans and laser cutting e plan for this model. It is my first attempt at a scale model and I am finding your Build Log very helpful. I have sent off the cutting plans for a quote and hope I will be able to start the build early in the new year.

Looking forward to your continuing Log.

Cheers,

TonyW51
Melbourne, Aust.

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Peter Balcombe
Posts: 1140
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: SF33 1/6 scale

Post by Peter Balcombe »

Hi Tony.
Very glad to have you on board.
The plan is probably not one of Cliffs best (God rest his soul), but I can help fill in missing info./telling you what I have done.
It does appear to turn out to make up a very nice looking model which appears to fly well.
The photos below are from an Irish build thread.
Attachments
C1CC41CE-AD17-49F8-94CD-DAA0A23A9284.jpeg
C79374FE-2038-435B-B04C-C028B9DE37C0.jpeg
E3AD312B-9BB4-4C75-BD51-DE2073048BA0.jpeg
13C6BDA4-4F00-4BB6-829E-A057AF238365.jpeg

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