Sssshhwept. Geoff Dallimer’s ‘Sssshhwept’ was originally featured in May 1969 RCM&E. Featured again in 2020. “A rudder, elevator and throttle control Sportster designed for GG control and suitable for the latest lightweight multis.
- Designer: Geoff Dallimer
- Wingspan: 44″ (1117mm)
- Flying Weight: 1.56ibs / 708g
- Motor: PO-2830-1350 available from www.4-max.co.uk
- Prop: APCE 8″ x 4″ available from www.4-max.co.uk
- Battery: 3 cell 2200mAh LiPo battery
- ESC: 4M-ESC30A35
- Spinner: 38mm/1.5″ Chrome Effect Spinner
- Servos: 2pcs of 4M-090AH-017
- Wheels: 2.5″ (63.5mm) Light Weight Rubber Wheels
About the plan from designer Geoff Dallimer:- Since I had flown GG as long back as 1958 (before ‘advancing’ to free flight competition flying incidentally!), the many advantages of pulse proportional were not lost upon me. That engine control is also available now from actuators of the Rand type makes this kind of control system very competitive indeed on a cost/value basis for the sport flyer. The basic design parameters set were simple, ie single-channel pulse proportional control, light airframe, adequate power, and an ‘out of the rut’ appearance if possible. In the event Sssshhwept met these requirements reasonably well, weighing in at 28 oz complete with 500 DID DEAC driving home-built receiver and Rand actuator. Sweptwing configuration was adopted in an endeavour to smooth out any tendency to ‘gallop’ by increasing longitudinal stability, whilst vortex tips can be claimed to be advantageous during fast circuits! The airframe is quite conventional perhaps traditional would be a better word – and since the construction is to be light, its strength must come from spreading impact loads evenly into the structure, and by avoiding localised highly stressed areas. Two load-bearing members bridge the wing cut-out between engine mounting and aft sections of the fuselage, and serve the double purpose of providing a mounting rail for the Rand/Rx unit a la Boddington! Sssshhwept has withstood a high-speed dive into the ground, most damage resulting from the power pack going through the I in. ply bulkhead. In this particular instance, the model had got into an uncontrollable dive with the dive steepening as airspeed increased – a state not unknown with other swept wing designs including full-size aircraft as the late John Derry demonstrated in the DH108 when unexpectedly achieving the first British faster than sound flight during a near-vertical dive. Like the swept-wing DH108, Sssshhwept will recover if the power is throttled back – and you have enough height! Wing: Commence construction with the wing by sandwiching the required number of blanks between root and tip ribs, then carve the resulting block to shape. Lightly sand each rib separately to trim its outline to match the wing taper. Ensure that the assembly is true before cementing the joints – warps are troublesome enough without building them in. It is particularly fatal to force-fit the webbing between the main spars since this is almost certain to result in a twisted wing. To fit the LE sheeting I prefer to butt joint it first to the LE, and when the joint has set, pull it down onto the main spar…”
What’s in a Laser or CNC Cut Wood Pack? – A CNC or laser cut wood pack contains most, if not all, of the intricately shaped parts shown on the plan, which would be difficult or time-consuming to cut out by hand. It does not contain any sheet or strip wood, which you will need to buy separately. Alternatively, you can purchase an Additional Wood Pack, if available. Our Laser or CNC Cut Wood Packs only contain balsa, ply and lite ply and do not include other materials that may be required to complete the model, such as hardwoods, metals and GRP sheets.
What’s in an Additional Wood Pack? – Our Additional Wood Packs contain MOST of the necessary sheet and strip wood needed to complete a model being built from a Sarik Hobbies plan and using the associated laser cut wood pack, if available. We stock a wide range of balsa, ply and spruce in popular sheet and strip sizes but even so we cannot guarantee to be able to supply all the wood necessary to complete each model. So some additional purchases may be required from other modelling wood stockists if not available from Sarik Hobbies. Our Additional Wood Packs only contain balsa, ply and spruce wood in the stock sizes as used by our suppliers and do not include other materials that may be required to complete the model such as hardwoods, metals and GRP sheet.
What’s in a Short Kit? – A short kit usually contains, where available, the plan, the laser/CNC cut wood pack, additional wood pack, canopy, cowl or any other available Glass Fibre or plastic moulded items.
Please note that all plans are printed to order and as such we are unable to accept returns.
Plan RC1030 Additional Wood Pack AWPRC103 Laser Cut Wood Pack WPRC1030 Short Kit SETRC1030 Canopy CA1030CY