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Introduction F5J 2.9m

Product Code: INTRODUCTION-F5J
 (43 reviews)

Price: $194.97

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Description

The Introduction F5J is a plane for pilots who love long flights in the thermals as well as for those who love to have relaxing flights and for "come-without-charger-to-the-field" pilots. The Introduction F5J uses the same fuselage and tail as the well liked Inside F5J but with a more stable polyhedral wing with flaps on the centre panel only.

The model uses a tubular carbon spars, precisely lasercut wood parts, a very simple construction (think 3D-puzzle), easy and forgiving take off-, flight- and landing characteristics, large speed range due to the modified AG35 section, ecxellent handling and thermal characteristics.

2860mm wingspan, 920g flying weight, three-part wing with multiple dihedral and attached wingtips, lightweight rudder and elevator constructed in a solid interlocking framework, removable elevator (optional) mounted in front of the rudder, 90° deflectable landing flaps enabling you flying vertical descents, integrated wing connectors in the main spar, innovative (tool- and tape-free) fixation of the outer wings. Vertical descents with deflected landing flaps (90°) and landings avoiding the vortex zone on steep slopes are now possible without any problems.

The recommended drive - containing the BL-outrunner Hacker A20-22L Evo, a 3-cell LiPo with a capacity of 1300mAh and the CamCarbon 11x6 prop - allows a many many climbs to thermal country. Due to the light weight, a motor run time of 5 to 10 seconds per climb is sufficient.

The kit:
Main feature of the model is the tubular carbon spar, onto which the lasercut ribs are kind of "threaded". Stylish wingtips ensure an elegant appearance. Our Introduction F5J has the most beautiful and elegant fuselage of all of our Gruener kits so far and it is consistently designed for the use of small brushless outrunners. The flying weight starts at 920g. Considering a wing with nearly 3 meters wingspan and a wing area of 65dm² (wing loading approx. 14g/dm²) you might imagine the thermal abilities of this design. Due to the long fuselage and the multiple dihedral in combination with the wingtips, the INTRODUCTION F5J has excellent flight characteristics.

The fuselage made of balsa is reinforced with light plywood in the front section. A precisely shaped milled part is already prepared to fix the motor Hacker A20-22L Evo. The kit contains, besides of the lasercut parts, CRP-spars, GRP-leading edges, all the small parts and linkages needed to complete the model. An excellent full scale full colour plan and a richly illustrated German construction manual is supplied. An English translation of the Inside F5J (same fuse as Introduction F5J, but more complex wing) is available here.

Glue, covering film, power- and RC-components are NOT included in the kit. As covering film we recommend ORACOVER or ORALIGHT iron-on film.


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
Aspect ratio 12.6
Wing airfoil AG35
EDA (dihedral) 12.0º
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


Recommended RC
Rudder & Elevator KST X06, KST X08, CHA DS09, MKS DS6100, MKS HV6100, Blue Bird BMS-125, Blue Bird BMS-126, Graupner DES 427BB
Flaps CHA DS09, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-115, Blue Bird BMS-125, Graupner DES 427BB
Receiver 5+ channel rx to match your transmitter
Power 25A - 40A ESC with 2A - 3A uBEC



Recommended RC
Rudder & Elevator KST X06, KST X08, CHA DS09, MKS DS6100, MKS HV6100, Blue Bird BMS-125, Blue Bird BMS-126, Graupner DES 427BB
Outer ailerons CHA DS06, KST X06H, KST X08H, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-101DMG, Blue Bird BMS-101HV, Blue Bird BMS-125, Blue Bird BMS-126, Graupner DES 427BB
Inner ailerons KST X08H, CHA DS09, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-115, Blue Bird BMS-125, Graupner DES 427BB
Flaps MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-115, Blue Bird BMS-125, Graupner DES 427BB
Receiver 9+ channel rx to match your transmitter
Power 30A - 40A ESC with 4A - 5A uBEC


Powertrain Recommendations
XPower F2915/12 XLight 3S 900mAh LiPo, 10x5 or 10x6 (recommended)
Axi 2217/16 V2 Long 2S 900mAh LiPo, 12x6
Axi 2217/20 V2 Long 3S 900mAh LiPo, 12x6
Axi 2220/16 V2 Long 2S 900mAh LiPo, 12x6 or 12x7
Axi 2220/20 V2 Long 3S 900mAh LiPo, 12x6 or 12x7
Dualsky XM2532EG-16 3S 900mAh LiPo, 9x6 or 10x5
Dualsky XM3036EG-11 3S 900mAh LiPo, 10x6, 10x8, or 11x6
Mega 16/15/4 2S 900mAh LiPo, 8x4
Mega 16/15/5 3S 900mAh LiPo, 7x5
Note the Dualsky, XPower and Mega motors do not have rotating cases and have rear mounted power leads and are thus easier to mount.
Choose a battery capacity after completing the model that will assist obtaining the correct CG.

Recommended Control Throws
Rudder 60mm each way
Tailplane 15mm each way
Flaps 70° - 90° deg down




Reviews 43  


 Review by:

Excellent service

I plan to start this product next month so I havenít even opened the box yet. That being said, I was floored at how fast the service was getting this kit to me in the US from the U.K. To Wisconsin in just a few days.

Great service which alleviates any concerns I may have had in doing business ďacross the pondĒ.


 Review by:

Introduction F5J

Super fast delivery as always 👍
Quality of laser cutting is spot on and fits perfectly.What more can you ask for.Compared to kits from other well known suppliers that I have purchased from these are just miles better.Will purchase again.Not completely finished yet but I know it will fly as advertised.Thank you for yet another quality purchase.


 Review by:

Introduction F5J

Super fast delivery as always 👍
Quality of laser cutting is spot on and fits perfectly.What more can you ask for.Compared to kits from other well known suppliers that I have purchased from these are just miles better.Will purchase again.Not completely finished yet but I know it will fly as advertised.Thank you for yet another quality purchase.


 Review by:

As always, my package from Hyper Flight arrived promptly and well packaged. The Introduction is a very well done kit. The laser cutting is excellent and all parts fit correctly. Many thanks to the folks that took the time to translate the German instructions to English! While the plans are very complete, having the assembly instructions helped a lot. The kit went together very well with a minimum of issues.My AUW for the maiden flight was 1000g. A little heavy but I glassed the front part of the belly as I sometimes fly at a dirt (rocky) air strip. The initial flight only required a few clicks of elevator trim and it thermaled quite well on a 70 degree (F.) day with 1-3 mph winds. Still working on getting the elevator/flap mix right but they definitely are effective! Not the same as my carbon F5Js, but a lot of fun to fly. I'm glad I got it.


 Review by:

Extremely Fast Shipping

Iím very impressed by the fast shipping.Three days to Tennessee.This will be my first F5J build.Thank you for your Professional service.


 Review by:

Extremely Fast Shipping

Iím very impressed by the fast shipping.Three days to Tennessee.This will be my first F5J build.Thank you for your Professional service.


 Review by:

Great glider

Iíve just finished building the glider. Everything is well cut and accurate. The English translation manual did throw up a few snags but if you take your time then they can be easily resolved. Came together really well and Iím so happy with it. Trim flight only required a few clicks which was great and a surprise.

The test flight went great and despite the bumpy air she floated really well! Just need to fine tune the flaps.

If you want a relatively low cost thermal to either get you into F5J or a relaxing thermal glider in general then this is great option.

Neil as always was really helpful and service was excellent.


 Review by:

Excellent Service and Advice

On ordering the Introduction F5J I received it the very next day the advice given to me by Neil was second to none. I am halfway through the build and have had no problems whatsoever, I can not wait to fly her
Thanks again Hyperfight I am sure will do more business very soon


 Review by:

Excellent Service and Advice

On ordering the Introduction F5J I received it the very next day the advice given to me by Neil was second to none. I am halfway through the build and have had no problems whatsoever, I can not wait to fly her
Thanks again Hyperfight I am sure will do more business very soon


 Review by:

Introduction F5J kit : building, testing, flying

I have bought 3 kit of this glider, 1 kit for wing, and 2 kit for fuselage. I have made with first 80 flights, and I have broken fuselage at a launch in F5J competition. Second fuselage I have broken after 70 flights, after my mistake at landing. With third fuselage I have only 7 flights, but seem to be the best variant. At this moment I have two wings and 2 fuselage, and one build with carbon tube. It's wonderful glider. Last variant have CG at 94 mm. This glider is an wonderful floater. For more informations, build log, many graphics, and a lot of pictures, please visit: https://www.rcgroups.com/forums/showthread.php?3970109-Introduction-F5J-kit-building-testing-flying


 Review by:

Update with Flight Report

I've now completed the Introduction and had roughly five flights on it. I am happy to report that the flight characteristics are positively STELLAR. I have a number of thermal ships including high end F5J, DLG, etc. This plane is a joy to thermal and looks fantastic while doing it. My AUW flying weight is under 1000 grams (35 oz) with a 1300 mah 3S pack in the front and no added balancing weight. The Introduction is agile, signals lift extremely well, and can even handle some wind just fine. Best of all, the flaps make for EASY hand-catching in the most unfriendly of landing areas. I would build another in a heartbeat, even though it took a while. A+ to Neil and Gruner!


 Review by:

intro f5j

hello very nice kit complete every thing fits perfect this was a joy to build super nice blue prints that are so pretty you could frame them i have not flown yet but it is ready just need a day i do advise dont buy th blue bird bms 125 wv servo to much slop in gear train i highly recamend hitech hs 65 mg a hair bigger but precise movement did i mention the wood is all top shelf strait nicly grained AAA balsa very happyy and delivered to usa in 7 days amazing you all did a great job an this glider thanks again i am sure that by other revues it will float like a feather


 Review by:

intro f5j

hello i live in us super fast shipping it was here in 7 days amazing i have waited way longer for things shipped in us also kit is super nice every thing fits very nice have not finished build but close in a week what a pleasure to build and the plans did i mention that they are beautiful very detailed what a deal for 200 bucks i love it thanks again rich if you dont have this glider buy it now !!!


 Review by:

Introduction F5J

As always, fantastic service from Hyperflight. This kit arrived very well packaged the day after ordering. I have only just started building but it looks to be of very good quality and so far has gone together well. I chose this glider as it is from the same company as the Slite v2 that I have previously built and am very happy with. I have no doubt that the Introduction will perform equally well.


 Review by:

Nice kit

Pretty nice kit, but parts fit has some concerns. Other reviewers note perfect fit do it might just be my kit, but even overlaying some of the parts on the plan reveals 2-3 mm discrepancies in dimensions. Lack of instructions is also a problem as the included directions are in German and the translated instructions for the inside f5j are different in critical areas, like the dihedral angles.

All of this can be overcome but overall, this kit is a solid notch below something like a Yellowjacket.

Iíve got two wing panels to go and ultimately will report back once completed. Iím sure it will fly splendidly.


 Review by:

Best balsa wood kit i have ever built! Superb in every way. Neil is extremely knowledgeable and helpful.


 Review by:

Most Impressed

I cannot overstate how impressed I am with the Introduction. The kit is beautifully produced, and goes together like a Tamiya plastic model. In less than a month of very relaxed building, I was ready to test fly today. I have been building and flying RC model aircraft since 1974, and in all that time, have never had a model fly "off the board" until today. Not a single click of any trim was required. I cannot recommend this model enough.


 Review by:

Introduction F5J review - update

After 33 flights, mainly in light winds, and 2 flights of over 1 hour, I am well pleased.
The model is easy to rig at the field and is sill undamaged, despite its light structure and my aging fingers.
It is my first "modern" thermal e-soarer, and it amazes me how much lift there is.
I would recommend this model - you might also need a deckchair and sun cream.


 Review by:

Introduction F5J

I bought this, (together with the recommended bluebird servos) in October 2020, and it had its maiden flight today. I used a Roxxy 28-34 motor with a 9x6 prop providing just under 100 Watts.
1) Good prompt service from Hyperflight; thank you.
2) Instructions are in German Ė though well-illustrated. Unofficial translations are available on the web.
3) Balsa quality is good; hardware complete. Nicely drawn plans. Perhaps the circular spar holes in the wing ribs are a little large. Materials are light and it needs care not to be heavy handed when building. It goes together quickly Ė all the parts fit. The carbon leading edge with iron on covering works remarkably well. Needs care with wing joiners Ė but the system works well.
4) It balanced at 87 mm from LE, as per instructions, using a 1600 mAh battery and no added weight. Also flew OK with a 1300 mAh battery which was 24 g lighter.
5) Landing flaps are effective Ė landings are slow.
6) It circles tightly and gains height quickly. It is my lightest and largest electric glider yet, and it thermals better than anything I have had previously. More than once today I had to use flaps to dump height in a thermal. I am looking forward to flying this a lot.
7) Good value at this price.


 Review by:

5 Star Kit

The delivery by Hyperflight is excellent.

As mentioned by most, this kit is absolute quality and the parts fit perfectly. Given the kit seems to have found its way to the USA and Australasia I am surprised the instructions haven't been officially translated from German. The translation for the Inside F5J differs significantly after the centre section of the wing is complete. The sheet and part numbers are different and it means following the German version. They use symbols for gluing so it is quite intuitive. Once you have completed the centre section the same process is followed for the outer sections.
Having covered the wing sections I would highly recommend that all the surfaces are sanded to remove the charred surface. In covering the main section the covering started tearing away when stretched because adhesion to the burnt area was very weak.

For the price this kit is an absolute steal :)

Looking forward to getting it in the air.


 Review by:

Very satisfied arrived in good condition easy build very good service recommend to all.


 Review by:

Introduction f5j

Starting at the beginning, the kit was well packaged and arrived promptly.
The quality of the material selection and the laser cutting is outstanding, parts fit with little or no reworking making the assembly of the model fast and a joy.
The plan is clear and comprehensive, the instructions although in German give a graphical guide, and English instructions for the Inside F5j, downloadable, cover most of the build .
Build threads on YouTube are worth watching.
First test flights confirm the model is easy to fly and I am looking forward to relaxing days thermal soaring in the summer ahead.


 Review by:

Introduction F5J

Excellent kit. Wood, cutting, accessories, plans, were perfect. Assembly was straight-forward and easy.
Would buy from this maker again. Delivery and help with ordering was the best.


 Review by:

Introduction f5j

Great service, fantastic advice for those who are actually interested in purchasing great quality kit


 Review by:

Introduction f5j

Great service, fantastic advice for those who are actually interested in purchasing great quality kit


 Review by:

Introduction F5J

Unbelievably rapid delivery. Kit box was received suspended within a robust outer box - very safe. All components complete. Quality of materials and cutting appear excellent. Really looking forward to building this one. Birthday present to myself so can't start until the day comes around!


 Review by:

Impressed!!

This arrived in about 5-7 days to here in New Zealand. An excellent looking kit and such a small carton for this wingspan. Very Happy thanks...Laurie


 Review by:

Introduction F5J

The Introduction kit packed in a sturdy box arrived at my home in Australia 7 day after placing the order. All components are accounted for. The cutting and the wood employed in the kit is of high quality. Building has commenced and I am amazed how accurately components fit together.

Thanks Neil for another effortless transaction.


 Review by:

Wonderful kit very precise! And Hyperflight.co.uk awesome service took only 3 days for delivery to the US!


 Review by:

Introduction f5j

Ordered my glider and the next day it was delivered! Glad I ordered it as it is now temporarily out of stock again only had a quick look in the box so far but everything was packaged well and quality looks superb! Thanks everyone at Hyperflight couldn't ask for a better service


 Review by:

Introduction 5fj

The kit arrived promptly looks good, no English instructions so if your not an experienced builder or German then it may be an issue
Iím looking forward to building but it wonít be for a while the kit is on route to my home in Austrslia


 Review by:

Fabulous floater!

I inherited this Intro from my dear deceased friend Spencer, who didn't quite manage to complete it before he departed for the great hanger in the sky. My only task was to install the motor, ESC and lipo, which was relatively easy, giving an AUW of 975gms.

The maiden flight off the slope was delightful in its stress-free nature with minimal trimming required. Since then I've flown Intro on numerous light weather occasions up the hill (10mph or less) and it is always a joy to experience its vice-free behaviour - so stable you can almost eat your sandwiches without having to touch the sticks! At the same time it indicates thermals well and picks up height quickly. Precision landing is no problem with the very effective flaps. At first I was a little worried about landing such a fragile-looking model on our rock-strewn slope sites, but it's survived 2 seasons now with no damage.

Overall, an excellent lightweight floater that is tougher than it looks!


 Review by:

good


 Review by:

Introduction

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:

Exceptional 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:

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:

Introduction

Really quick delivery and although I haven't started the build yet quality appears to be excellent.


 Review by:

Just 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:

Introduction 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:

Introduction

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:

Introduction F5J

Excellent delivery very quick but there was damage to the both boxís. 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:

Introduction

Excellent delivery.
Kit is excellent quality.
Not done any buildng yet as recovering from knee replacement op.


 Review by:

Introduction

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.


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