Algebra 8

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Peter Balcombe
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Location: Clevedon, North Somerset, U.K.

Algebra 8

Post by Peter Balcombe » 12 Apr 2018, 16:05

Following on from the ‘standard’ Algebra build recently completed, moulded fuselages of the old Algebra 8 (T tail, swept back wing version) are also to be re-introduced via Cliff Evans in due course.

I have designed a new built-up wing for this version, retaining the characteristic wing sweep and E193 section, but using a carbon joiner system and implementing ailerons and flaps to hopefully give a more versatile model at a similar weight to the previous RES version.

A proving build has just started, commencing with the wing structure as shown.
The wing uses hardwood spars, faced at the rear with full span 1/16” ply webbing.
A 1/4” square hardwood jigging spar and a 10mm OD carbon joiner tube stiffen up the root end.
More or less full span control surfaces will be hinged from the dummy TE once this has had an 1/8” balsa doubler added.
The photo below shows the first wing structure with all ribs on the lower spar & web strip, with the 1/4” square jigging spar slid in through the root end ribs.
The joiner tube will go just in front of the main spar at the root end, parallel to the jigging spar.
The wings will be sheeted with 1/16” balsa and then glassed as for the standard Algebra in due course.
Attachments
9A2CB75C-B6DF-4684-991A-9C257AA230E9.jpeg
B09641EE-39B2-4290-8221-645862700DEC.jpeg

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Peter Balcombe
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Re: Algebra 8

Post by Peter Balcombe » 16 Apr 2018, 11:57

1st wing now has carbon joiner tube installed and top sheeting attached.
Time to add the rear incidence tube and prepare servo bays prior to lower skin.
Attachments
FC97EE4A-F8DD-4929-8009-F1BD83F9CD38.jpeg
64D988B6-6FE1-4932-ACEC-4F52855822CE.jpeg

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Peter Balcombe
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Re: Algebra 8

Post by Peter Balcombe » 03 May 2018, 10:56

Both wings now have top skins and wing joiners in place - so its time to see what they look like on the fuselage.
Next jobs are to prepare the servo positions & hatch frames before fitting the lower skins, then leading edge, wing tips & control surfaces.
Attachments
222434D8-5E3A-451C-9C74-E9468050D225.jpeg
Wing joiners_top skin
8B4D6E62-236D-42E8-A75B-F0F11013421C.jpeg
24060907-5AE2-4E54-AAD5-B8CA216D056F.jpeg

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Cliff Evans
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Re: Algebra 8

Post by Cliff Evans » 03 May 2018, 11:35

Lovely!!

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Peter Balcombe
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Re: Algebra 8

Post by Peter Balcombe » 12 May 2018, 14:19

Now with wing tips, hardwood LE strips and tailplane fitted.
Fuselage servo tray and AMT bellcrank now to be fitted before the finpost & rudder is added.
Attachments
63E4DD0D-3838-4223-A3F9-E28FF7B279D5.jpeg
1387D472-048D-49D3-9071-88E255CF7A69.jpeg

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Peter Balcombe
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Re: Algebra 8

Post by Peter Balcombe » 07 Jun 2018, 17:00

Nearly ready for skinning & finishing now.
Canopy attachment to be sorted, but use as an airbrake no longer in the equation.
Attachments
9EA6E44F-3639-4711-A37F-72A36B46392F.jpeg
448D9760-C32D-4185-AD44-B57A474D41C9.jpeg

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B Sharp
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Re: Algebra 8

Post by B Sharp » 08 Jun 2018, 22:24

Good decision on the canopy airframe Peter. It was a source of frustration and annoyance on my Algebra and also a Vega TS as well as being useless as a means of hitting the landing spot.
Brian. :o

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Peter Balcombe
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Re: Algebra 8

Post by Peter Balcombe » 23 Jul 2018, 18:42

Nearly finished now.
Rudder closed loop wires to be fitted plus radio gear & balancing, then just about ready for a maiden.
Attachments
A7CACA46-E135-4084-8342-C169CC826E31.jpeg
A438B3A0-0139-476D-A310-F11E8F206704.jpeg

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Cliff Evans
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Re: Algebra 8

Post by Cliff Evans » 23 Jul 2018, 19:57

Stunning Peter.

simon_t
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Re: Algebra 8

Post by simon_t » 28 Jul 2018, 20:11

Was good to see it ‘in the flesh’ today. Hopefully get to see it flying sometime!

Simon

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