Hi

I'm just trying to decide on my next glider purchase. So I was wondering if anybody had any thoughts on which is the better glider between the Dynamic-s and The ASK-21. Both seem to get reasonable feed back from what I've read so far.

Mick

DynamicS - http://www.hobbyking.com/hobbyking/s...arehouse_.html

ASK21- http://www.hobbyking.com/hobbyking/s...dproduct=19699

Only bit of advice I will offer is on the Dynamic S. I purchased one, flew it once. Seemed to fly ok, but a bit sluggish. Read the reviews and others said motor installed was not as advertised, 300 watt/ 920kv. Sure enough, plane had a 820kv.

Long story short, returned plane for "inspection" to HK in WA. 6 weeks later no reply. Went through PayPal, finally got a refund. If you get the plane with correct motor, it should fly fine.

Hi, Mick.

They are very different planes so it's hard to say which is "better". If you are looking for speed and aerobatics the Dynamic would get the nod, though it may need some upgrades, while the ASK would probably deliver a little better soaring performance with scale looks though it won't be a floater. Personally, I would be hesitant about a foam warmliner/hotliner. It's hard to get a rigid foamy without heavy reinforcement. Have you considered the GL Speedy? Glass fuse, built up wings, and you could choose your own electronics without getting much more expensive than the Dynamic-S.

I flew a friends Dynamic-S yesterday at the field and was quite impressed. So I ended up buying one last night. Unfortunately I somehow overlooked the GL Speedy when I was looking through the HK catalogue. The GL Speedy looks pretty good and well worth the extra $40 judging by its spec. Oh well it may be next in line further down the track. The Dynamic-S looks like a bit of an all rounder from what I've read and I already have a Zephyr V70 which manages around 80mph, buts not so good at doing a bit of relaxing gliding and is quite maintenence intensive. So hopefully the Dynamic-S will offer me some relaxing gliding and a few loops and rolls. Thanks for your input guys

Mick

Going with something you've seen and like is always a good bet. Let us know how it flies, Mick.

Apparently the Dynamic-S is a clone of the Blaze from what i've read.
The Blaze is discussed in detail here- http://www.rcgroups.com/forums/showthread.php?t=1194905

Mine should arrive within the week if all goes well.

Mick

I finished setting my Dynamic-s up yesterday and took it for a maiden today in about 10km breeze. It took me a few launches to get my CG about the way I like it carrying a 2200mah 3s lipo. The aircraft has a few oddities I need to sort out.

1. I had to increase my AILE throws to 100% to gain any reliable bank and yank control.
2. My aircraft at this point has a tendency to turn right, even with left AILE trim. The wing doesnt appear to be twisted. So I need to look into that
3. It also tends to climb out quite steep under power, like the motor angle is wrong. My friends one does this as well. So some down ELEV is required under power.
4. It also has a nasty tip stall if I turn at low speed whilst banking into an approach. So it needs power through the turn.

It appears to glide ok, and is fairly robust as I tip stalled into the ground twice at low speed as I was bringing it into land for adjustments. Robust though it might be I still think it would be a train wreck right off with a hard nose in crash. Overall it seems more reliable under power. I think I'll program some spoileron to switch for landing for days that are lacking in a head wind as it comes in quite hot without a head wind, like my V70 Zephyr, but not quite as aggresive as the Zephyr. I need a few more flights to decide how much I like it, and plenty of tweaking. Not an aircraft for beginners.

Mick

Originally Posted by Bravo47

...The Dynamic-S looks like a bit of an all rounder from what I've read and I already have a Zephyr V70 which manages around 80mph, buts not so good at doing a bit of relaxing gliding and is quite maintenence intensive. ...

Mick

Hi Mick,
I was looking at the V-70 Zephyr for slope/windy days/fun flying. What do you mean by it being "maintenance intensive"? Do you mean harder to handle in the air or finicky to keep it tuned or some such?
Cheers!
Christopher

Originally Posted by AlThuban

Hi Mick,
I was looking at the V-70 Zephyr for slope/windy days/fun flying. What do you mean by it being "maintenance intensive"? Do you mean harder to handle in the air or finicky to keep it tuned or some such?
Cheers!
Christopher

Hi Christopher

Well the Zephyr certainly fits the fun factor catagory, but it needs a regular pre-flight inspection due to a few problems.

1. The new type rigid EPO used on the Zephyr has some bonding issues with epoxy mostly, but CA as well. The wing mounts fall out from the factory, as do the servo horns. Basically everything that was glued from the factory has the potential to fall out. I even had a wing mount fall off that I had re-epoxy without taking any foam with it. Its CA'd now as well as taped.

2. The low wing design means that the wing catches on landing putting pressure on the wings to separate. Landings are hot if there is no head wind so care must be taken if you dont want to repair. Many of us have fitted body or wing skids to offer clearance from snagging. Programming spoilerons for deployment in calm weather landings is helpfull. Flaperons cant be used safely for landing due to the low wing design. Flaps hit first.

3. Foam control surface hinges split readily

4. Setting your elevator servo at 100% rate will tear the control surface.

5. Battery space is limited, so battery research is required.

6. 80mph is its top speed. This can be achieved with stock 3s setup. 4s setup results in battery space issues as well as a severe flutter beyond 80mph. A simple thrust tube on 3s can get it to terminal speed.

Thats the negatives, but if you know all that and correct/modify its a great little aircraft. Its a little nerve wracking at first until you get used to the turbine like sound. Its quick, aerobatic, and stable though if you fly within the limits of the airframe. I tend to fly a combination of gliding with a few high speed low passes. Landing is where most care is needed, and keeping a bit of power on through the turn like with all EDF's is a good idea. The Zephyr is still a favorite in my hanger to date.

Mick

I have both the dynamic s and zephyr v70. Both are fun but the zephyr doesn't really slope and has a pretty steep glide slope.

For windy days I often bring the dynamic s, it can climb like nothing else and I can keep it airbourne for 2 hours on a single 2200mah battery with a bit of wind.

In terms of maintenance I agree the zephyr is a bit more needy and for my money feels more fragile because of the wing attachment design. On the other hand with the exception of a three point landing the dynamic s has only needed a new esc (stock one lasted about 15-20 flights from memory).

If my zephyr gets destroyed I won't replace it, the dynamic s on the other hand would be missed when it is too windy for anything else I have.

Thanks Mick and Groden. Good and useful feedback. The ducted fan sound is tempting, but might upset the more genteel members of my sailplane club. Plus I noticed on sloping that landing seems to be the trickiest part due to rotors and ground effects. I might go for a Speedy "crunchie" instead then. I'm told people slope with their Radian Pros, but it still seems light and a bit sluggy in flight.
Cheers!

A friend of mine at the field is always reccomending his Super Dimona as good aircraft cable of both speed and gliding ability. I'm still flying EPO so far.

Link- http://www.hobby-lobby.com/superdimona.htm

Originally Posted by thegroden

I have both the dynamic s and zephyr v70. Both are fun but the zephyr doesn't really slope and has a pretty steep glide slope.

For windy days I often bring the dynamic s, it can climb like nothing else and I can keep it airbourne for 2 hours on a single 2200mah battery with a bit of wind.

In terms of maintenance I agree the zephyr is a bit more needy and for my money feels more fragile because of the wing attachment design. On the other hand with the exception of a three point landing the dynamic s has only needed a new esc (stock one lasted about 15-20 flights from memory).

If my zephyr gets destroyed I won't replace it, the dynamic s on the other hand would be missed when it is too windy for anything else I have.

2 hours...thats amazing, I struggle to get 18 mins out of mine, I must have it set up wrong.
i'm new to gliders and have no real idea what to look for and how to get the max time out of a single 3s 2200.

any tips would be greatly recieved.

I had my second flight today with my Dynamic-S and had a ball. This is a new kind of plane and flying experience for me and I like it! Before this I have been flying my Hanger9 60" P-51, a very scale and fast warbird and my H9 80" Piper Pawnee. I had a great flight today in a good blow which it loved. Spent some time gliding around with a hawk who really seemed to like my bird as it was silent, like him...Between powered flight and gliding I flew approximately 35-45 min. way more than my usual 12 min. of powered flight, and much more relaxing. I believe I may be a convert to this way of flying. Like alot of other owner's my plane need's lot's of down trim on the port wing. It seem's as thought he starboard wing is thicker which would be heavier. Nothing look's twisted or out of whack. It has me in a pickle as of this time. As I have never flown a V-tailed plane, it crossed my mind to think that it somehow could be to blame, although I don't know how, unless it had something to do with the rudder configuration of which I am not well schooled. Dave/ZZ

Well I'm upto 15 mins flight times and then I have to land as I'm just not used to flying for so long.
I don't have any telemetry as only use a dx6i so that doesn't help with flight times.
I am yet to fly in any winds over 7mph so can't say if that's gonna help or not..
This is also my first venture into a glider/warmliner and I have to say I love it, I'm even looking into a super sky surfer as my next plane.

I have had to add some weight to the tail as its not possible to push the Lipo far enough back and still make sure the Velcro catches, and I also have a fair amount of trim on but I noticed one of my tips was a little twisted.

I'm gonna order eagle tree guardian for it and see how that effects my flight times.