|Alpha 2.0 Specifications|
|Wing span||2.0 m||79 in|
|Wing area||28.6 dm2||443 sq in|
|Length inc spinner||116 cm||45.5 in|
|Flying weight from||500 g||17.7 oz|
|Wing loading||17.5 g/dm||5.7 oz/sq ft|
|Spinner Diameter||30 mm|
|Centre of Gravity||60-70 mm from wing leading edge|
|Controls||Rudder, elevator, ailerons, flap, throttle|
|Alpha 2.0 Typical Weights|
|Fuselage||71 g||2.5 oz|
|Wings||180 g||6.3 oz|
|Tailplane||14.7 g||0.5 oz|
|Fin||11.7 g||0.4 oz|
|Accessories & glue||23 g||0.8 oz|
|Total structure||300 g||10.6 oz|
|Wiring||10 g||0.4 oz|
|Pushrods||10 g||0.4 oz|
|Receiver||6 g||0.2 oz|
|Rudder servo||5 g||0.2 oz|
|Elevator servo||5 g||0.2 oz|
|Wing servos (4)||28 g||1.0 oz|
|Speed control||25 g||0.9 oz|
|Motor||45 g||1.6 oz|
|Prop & spinner||16 g||0.6 oz|
|Battery||50 g||1.8 oz|
|Flying weight||500 g||17.7 oz|
|Rudder & elevator servos||KST X06N, KST X08N, Blue Bird BMS-101DMG, Blue Bird BMS-101HV, Blue Bird BMS-A10H, MKS DS65K|
|Aileron servos (2)||KST X06N, KST X08N, Blue Bird BMS-101DMG, Blue Bird BMS-101HV, MKS DS65K|
|Flap servos (2)||KST X06N, KST X08N, Blue Bird BMS-101DMG, Blue Bird BMS-101HV|
|Receiver||5+ channel rx to match your transmitter|
|Speed control||15A - 35A ESC, Sunrise 20A Pro, HyperFlight 30A BLHELI-32, Sunrise 30A Pro, YGE 35 LVT ESC|
|Alpha 2.0 Powertrain Recommendations|
|ADH300L / MM1914-1100 Front Mount||3S 500mAh LiPo, 9x5 prop|
|ADH300L / MM1914-1100 Front Mount||2S 600mAh LiPo, 11x6 prop|
|Axi 2208/34 V2 Long||3S 500mah LiPo, 8x5 prop|
|Axi 2212/26 V2 Long||3S 500mah LiPo, 9x6 prop|
|Mega 16/15/4||2S 600mAh LiPo, 10x5 prop|
|Mega 16/15/5||3S 600mAh LiPo, 7x5 prop (29A, 8.2 m/s, 1640 fpm)|
|Powerline Micro 1010/19||3S 600mAh LiPo, 12x7|
|Hacker A20-20L||3S 500mah LiPo, 10x7 prop (21A, 1950 fpm)|
|Hacker A20-20L||2S 600mah LiPo, 13x9 prop (23A, 1750 fpm)|
|Hacker A20-26M||3S 500mah LiPo, 9x6 prop (16A, 1530 fpm)|
|Dualsky XM2826-10||2S 600mAh LiPo, 10x7 prop|
Review by: AnonymousAlpha v2
The build quality really good, not a lot of room inside for servos but can get it all in. Yet to maiden weather in Australia at the moment isnít all that good.
Review by: SteveAlpha 2.0
I bought this model for some light weather sport thermal flying.
Ordered it at lunch time and it was delivered at 09:30 the next day! The best customer service from Hyperflight, as always.
The model is a beautiful example of a fully moulded plane - very light, perfect mouldings and nice flying surfaces.
The fittings pack looks to be very complete and as an unexpected bonus the model was supplied with a set of very nice wing/tail/stab covers.
I need to work out what electronics to use but I'm thinking KST X06 servos all round with a Hacker 4.4:1 geared A10-9L. There's not much room in that fuselage.
Looking forward to building and flying.
Review by: GBAlpha 2
Error in original comment.
Nose/spinner diameter is 30mm not 28.
Comment by: G BAlpha 2
A light and very nicely molded and finished model.
The fuselage is very skinny and merits some careful thought in order to be able to get everything in. Its so snug in the servo area that care is needed to come up with the right assembly order.
As stated, the nose is a true 28mm diameter - a 28mm outrunner will be a struggle to fit unless the power leads are run outside - or you have something like the old hyperion glider series motors with the extended and tapered nose. An alternative is to replace the motor bulkhead for a rear mount system - the down side would then be an unsupported area at the front of the model, unless a temporary front bulkhead is added later.
The flap servo installation was novel for me - servos inside the fus. connected through a shrouded hole in the side. This means the flap horn is right at the inner end of the surface and has to be engaged with the push rod at every assembly. I guess this results in less outboard weight in the wing and maybe a cleaner wing. In view of how little spare space is in the fuselage wing mounting area, the conventional servo in wing solution might have been better - but time will tell.
The tail surfaces use a spring and pull chord system - new to me but common on F3K models. Not liking the constant load on the servo at centre, I spent sometime winding and trialling counterbalance springs, mounted on the servo shaft.
I'm still juggling to get all the pieces in and reviewing motor options, so test flying may be some time off.
Comment by: Brian OxmanFirst impression
Only received this morning so can't comment on flying ability but this is an absolute work of art and a thing of beauty. Looking forward immensely to seeing it fly.