|Introduction F5J Specifications|
|Wing span||2.9 m||113 in|
|Wing area||65.0 dm2||1008 sq in|
|Length inc spinner||143 cm||56.4 in|
|Flying weight from||920 g||32.5 oz|
|Wing loading||14.2 g/dm||4.6 oz/sq ft|
|Spinner Diameter||38 mm|
|Centre of Gravity||87-90 mm from wing leading edge|
|Controls||Rudder, elevator, flaps, throttle|
|Introduction F5J Typical Weights|
|Total structure||600 g||21.2 oz|
|Wiring||10 g||0.4 oz|
|Receiver||10 g||0.4 oz|
|Rudder servo||11 g||0.4 oz|
|Elevator servo||11 g||0.4 oz|
|Wing servos (2)||22 g||0.8 oz|
|Speed control||40 g||1.4 oz|
|Motor||44 g||1.6 oz|
|Prop & spinner||22 g||0.8 oz|
|Battery||150 g||5.3 oz|
|Flying weight||920 g||32.5 oz|
|Rudder & Elevator||KST X08, MKS DS6100, MKS HV6100, Blue Bird BMS-105, Blue Bird BMS-106, Graupner DES 427BB|
|Flaps||MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-105, Blue Bird BMS-106, Corona DS843MG, Hyperion DS09-AMD, Graupner DES 427BB|
|Receiver||5+ channel Rx to match your transmitter|
|Power||30A - 40A ESC with 3A - 5A uBEC|
|Hacker A20-22L 11x6 prop||3S 900mAh LiPo|
|Hacker A20-20L 10x7 prop||3S 900mAh LiPo (21A, 1950 fpm)|
|Dualsky XM2826EA-10 45g outrunner||2S 900mAh LiPo, 10x7 prop|
|Turnigy C2826-1350||9x4.5 prop, 3S 900mAh LiPo (8.3 m/s, 1660 fpm, 23A)|
|Mega 16/15/4 direct drive||2S 900mAh LiPo, 10x5 prop|
|Mega 16/15/5 direct drive||7x5 folding prop, 3S 900mAh LiPo (8.2 m/s, 1640 fpm, 29A)|
|Recommended Control Throws|
|Rudder||60mm each way|
|Tailplane||15mm each way|
|Flaps||70° - 90° deg down|
Review by: AnonymousIntroduction
What an easy sailplane to put together - the laser cutting is top quality ,and so fine . The whole thing just slots together without any fettling of parts - just installing radio so havnt flown it -
Review by: Arthur BeckerExceptional craftsmanship
I have been building and flying rc over 40 years this is one of the nicest sailplane kits I have built and flown. Fit to finish is exceptional builds quickly. Hyperflight shipped fast and responded to my questions quickly. The people at hyperflight are great to work with. This has become my favorite craft to fly.
Review by: David Bundock
Fast delivery & excellent communication, well done Hyperflight. The kit is of great quality & a joy to build, I can't wait to get it finished & in the air.
Review by: Robert PoultonIntroduction
Really quick delivery and although I haven't started the build yet quality appears to be excellent.
Review by: G.PopeJust a lovely floater
First, per usual, the shipping was excellent. UK to NC, USA in 4 days. Always impressed with Hyperflight's service.
This is probably one of the easiest and fastest builds I've ever done. The build is straightforward and easy if you have any building experience at all. I didn't run into those "head scratching/questioning delays". With some building experience, one could follow the excellent German build manual and probably get by. However, the English translation is easy to follow, mostly corresponds with the steps in the German manual, and in spite of the wing build in that translation being for the Inside, the fuselage is identical and the wing is pretty much the same. I worked a couple hours every evening and one full Saturday and was ready to fly in 3 weeks.
My only 2 complaints; The ribs and mid ribs fit rather loosely on the carbon spar, I believe the tolerance's could be a bit tighter and need to be if using thin CA. I would suggest med-thick CA to get a good bond, or even epoxy. As it is, I just don't feel the wing is as "tight" as it could be, though when covered, is sufficiently stiff so this isn't really what I would call a "deficiency" just something that could be better. The second complaint is the motor nose block required some reaming and sanding to get enough clearance for the motor. The wires channel also required milling out. This just to make it all fit. There is almost no ventilation to the motor and heat will build quickly! Keep that in mind when choosing the motor diameter. I've overheated my motor and considering some ventilation options.
Just advice; Also when building the joiners, do one at a time and go slowly being VERY CAREFUL to get both wing panels properly aligned. If the joiner is off slightly, you will have difficulty getting the panels to align perfectly when assembled. Using the clips to adjoin the outer panels to the mid is a neat trick, but you don't want open space between the two and getting everything aligned during the build will assure no gaps.
Now on to flying. At this writing I only have maybe 15+ flights, but I am impressed. She is definitely a floater! A slow easy flyer that uses lift very well. I'm still working out trims but overall I am impressed. One big negative but one which is well known; This plane does NOT penetrate wind well. Much over 10 mph wind and she just stops. It will take considerable down trim just to move forward and personally I find it difficult to hang into lift with more than a breeze, as circling will take you far downwind quickly. But that probably says more about my piloting skills than the plane. Not a good clear way to add ballast other than there is room forward of the wing, but that will affect CG.
Overall, just totally pleased and out of all of my planes, this is the most relaxing and pleasant to fly in calm-light breeze conditions.
Review by: Carl BarkerIntroduction F5J
Amazingly fast delivery to me in Connecticut. I have just started building the Introduction and I was very impressed with the over all quality. The parts just snap out of the sheet and require no sanding and they fit perfectly. It's a well engineered kit.
Review by: KeithIntroduction
Great kit very easy to assemble as there is no cutting out to do every part is laser cut to a very high standard
The only problem I had was maintaining the alignment of the round wing joiner
Review by: DavidIntroduction F5J
Excellent delivery very quick but there was damage to the both box’s. Look as it the instruction manual took the force no damage to the parts.
The kit is excellent quality.
I am so pleased with my introduction to f5j.The build is so relaxing easy to assemble and every part fits very precise.
Review by: Ian ludwellIntroduction
Kit is excellent quality.
Not done any buildng yet as recovering from knee replacement op.
Review by: MarkIntroduction
For us flatlander thermal guys I the Introduction has a slight advantage in light conditions compared to my Inside. Pick your poison, but my go to ship in light lift is my wonderful Introduction.