USA warehouse now open. Our USA warehouse is now open! Low cost shipping and an ever growing variety make ordering from the US warehouse even better value!
This superb Electric Powered glider is finished in a scale Air Cadets scheme which is also excellent for orientation, the ASK21 is an attractive looking aircraft and this unique colour scheme really finishes of this model very nicely.
The fuselage is quality fiberglass construction with the ply motor mount and servo/battery tray pre-installed, the 3 landing wheels are also pre-installed. The wing is an all balsa construction and is superbly pre-covered, the wing features large flaps for nice slow landings and is a 2 pc plug-in set up for easy transportation and are mounted onto a solid CF rod, the wings also feature fiberglass wing tip skids.
There is plenty of room for a 36mm in-runner motor to spin the supplied 11x7 folding prop/spinner assembly which will give plenty of thrust for rapid ascent as well as efficient powered cruising, there is also plenty of room under the quick replease canopy for a decent size 3s pack for excellent flight times. There is no doubt about it, this is an attractive, quality powered glider that is also very practical being able to handle a variety of landing surfaces, one for almost any airfield that will give many hours of flying pleasure.
Includes: All Hardware Instructions Decals 11x7 Folding Prop/Spinner for 5mm Motor Shaft
Requires: Your Own 5 Channel TX/RX 36mm Brushless Motor with a 5mm shaft, 1000kv~1100kv 40A~50A ESC UBEC (Optional) 1 x standard servo & 5 x either mini servo or low profile glider servo 2650mAh 3s ~ 3000mAh 3s Lipoly Battery
Hey glider fellow ,can i use 3530/14 1100kv for this ask 21 ?
what is the replacement alum spinner for this ask 21
and what esc and servo are u guy prefer ?
put this engine
http://www.hobbyking.com/hobbyking/store/uh_v iewItem.asp?idProduct=30336
propeller 12x6 aeronat in cabonio
uses these wings flap servos and elevon
http://www.hobbyking.com/hobbyking/store/uh_v iewItem.asp?idProduct=31550
uses this for the rudder
http://www.hobbyking.com/hobbyking/store/uh_v iewItem.asp?idProduct=31576
not uasre his spinner and propeller series and too fragile
lipo 4s 3000 25/30 c to correct CG
CG and at 5.5 cm from the edge
ailerons the whole run and exponeziale 40
with this setup flies very well and you can run it alone without problems.
Ok, changed to a 3536 outrunner. But this thing wants to climb dramatically and stall turn when U hand launch!! Hand launch has to be very flat and throttle up gently!! Even with elevator at slightly negative mine still wants to climb quite quickly.
Capt.Morgan, I think it's tail heavy, try to modify GC. I'm glad that this model, with the new engine, is giving results after that unpleasant event. But we do not give up, we want to fly high! Good Flights. Good Luck.
Look for the site "bungymania" in French, witten by Bernard Chevalier, there are the possibility of reading it in other languages**. You will find everything you need to mount a successful AS K21.
Guys do not try using the recommended Turnigy 540S V-Spec motor in this girl!! Mine lasted about 30 seconds and burnt out!! When I bench tested it with the 11x7 supplied prop it was drawing over 60a on 4s which obviously this thing cannot handle!!! Not sure what I will try now but I have a bunch of outrunners that might fit??
Check out the description on the listing for the motor : It states 4S ONLY nothing mentioned about max voltage, don't know where U are getting your info??
Capt. Morgan, see you have used a 11x7 prop, it is not in the data table for Turnigy 540S V-SPEC INRUNNER W/ IMPELLER 1100KV
Data:
4S 14.8V
Prop: 8x3.8, 9x4.5, 10x5
Max Current: 24A, 29.4A, 35.5A
Pull: 1300g, 1570g, 1780g
ESC: 60A
We also have this engine on two measures rpm / kv, 1350 and 1100. This makes much difference.
Use the "OPC - Optimal Propeller Calculator" or the "STRC - Static Thrust Calculator", get this on Google. This is a good way to approximate the values **of engine x prop x trust x potency.
For me personally, I like to, Keep It Simple. I use watt meter and try use about 150w per pound for regular to sport flying and atleast 200-250w per pound for more agressive or 3D. Bottom line is the info on the site is very confusing and mislead me to think that this setup would be alright. At the time my wattmeter from HK burnt out and I should have known better but tried this setup anyhow without static testing!!
I know, I've been through several misunderstandings and wrong purchases and decided to be more careful in the choices and information provided. The subject "electric" still need further explanation in section Electric Basics. The calculation tools that I mentioned are easy to use and prevent misuse of components. Anyway, I'm upset about what happened.
I am having some trouble finding a nice engine to this plane. A fast 36 mm inrunner is hard to find. Anyone have a solution for a fast engine for this plane?
Hi Dezzaw. That is a outrunner. I was only looking at inrunners, that is what HK suggests. But did you have problems installing a outrunner?. I have been looking at the XK3674-B-1400KV but it might be to long E= 94mm and D 72mm
The wing profile is not Eppler205, it is FX60-126-1 as per flyfly
The wing area is not 30dm2, that would be much too small for this flying weight. the 2000mm Phoenix 2000 has a 35dm2 wing!
With battery and stuff the flight weight is over 2kg (as per 2010 rcgroups topic on the plane)
Yep, maybe I asked the question in a wrong way. I wonder if it would possible to mount a 35mm outrunner motor without modifications (i.e. fiddling with the mount holes).
i guess you would need to look at the listed motor for this plane and see what the mounting hole dimensions are(says 25mm)for the 36-74,(I would imagine there would be no modding the fuse. holes if they recommend this motor) and compare them to what you have/want to use.
Both 35 and 36 motors would have the same mounting holes. Just in case, check one of the recommended motors and make sure that your motor has the same spaced mounts. one issue I can only see is that it might rub against the motor leads of the outrunner.
Have ordered 2 ASK 21. One for myself, the other one for my freind who build them both. He encoutered a few litle problems during the build but nothing major which could not be fixed. canopy system was changed to earth magnet fixing one in the front and one at the rear but we added some tape in the front just in case. Both were test flown this afternoon at the same time, we even flew in formation, and gliders were handling perfectly although a bit on the heavy side. We flew toooooooo long that we lost track of time. My freind's barely made it back on the begining of the runway, while I was not that lucky and ended down the valley which resulted in a broken wing....... i was so mad but that's life. Glider is very strong and wish HK would sell a pair of wings separately, anyway i am ordering a couple more gliders.
PS we had sock inrunner, esc and 2600/2800 3S lipos in.
Regards,
11 comments. Reply..
Overall Rating
MeMeMeMe69
81 likes
Value
Quality
Like it?
I bought this model 3 months ago. It arrived after 5 weeks and the packaging was in absolutely perfect condition ie. there was no sign of any damage to it. When I opened the outer box the inner box was also in perfect condition. When I examined each of the parts of the model I found that the rear of the fuslage was broken. This was clearly not broken in transit and must have happened during manufacture. Now because I have worked in composites manufacture I can tell that this broken when it was extracted from the mould. The stabiliser on this model is high up, leaving a stress point at the rear end of the fus where any twisting of the stab tries to break the fin off the end of the fus. It looks to me like the stab was stuck in the mould and as the fus was pulled out it was twisted and caused the damage. Anyway, despite all of this I still had to send 5 pictures of the packaging, then another of the postage label. I am still waiting for a replacement and still have a useless pile of plane that I cannot fly.
12 comments. Reply..
Overall Rating
melvonnar
4 likes
Value
Quality
Like it?
beatuful glider: but is not for the novice builder; requires a great deal of work to get it in the air. received the kit with minor damage to wing tip, not a deal braker, can be repaired easly. the instruction that are included leave a lot to be desired, without building experance you may have a difficult time assembling this plane.
No comments. Reply..
Overall Rating
Jan
7 likes
Value
Quality
Like it?
Ordered two planes, one arrived in a flatten box with broken wings. Rejected the shipment and now waiting for refund. I'll open paypal dispute if HK doesn't react quickly.
The plane itself its a beauty, however a lot of DIY. You need to have some basic experience with building, brushing, drilling, glueing ...
No fly report yet.
2 comments. Reply..
Overall Rating
Werner
10 likes
Value
Quality
Like it?
Wunderschönes Modell, das darf man sagen. Es gibt viel daran zu bauen. die Beschreibung zum Bauen beschränkt sich auf ein Format DIN A3, ist für einen guten Modellbauer aber OK. An den Schwerkunktangaben zweifle ich! Die Vorgaben für die Rudereinstellungen sind leider sehr ungenau, ebenso für für Butterfly, Snap etc. Die Antriebsempfehlung von HK: Turnigy 540S V-Spec Inrunner w/ Impeller 110, ist defintitif zu schwach für ein Modell über 2 kg. Die Flugeigenschaften, und besonders die Landeeigenschaften sind schwierig und anspruchsvoll, nichts für Anfänger und Aufsteiger. Beim 5. Startversuch habe ich das Modell zerstört, HR und beide Flächen inkl. Stab gebrochen und die Nase ist eingerissen. Modell Entsorgen, schade drum. Gruss Werner
Copyright 2012 Hextronik Limited.
The HobbyKing.com®, OrangeRx, Turnigy, Durafly, nano-tech and other brand logos and names are trademarks of hexTronik Limited.
All rights reserved
