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Durafly Bf163 Komet with optional rocket!

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David Pearce 412/04/2015 11:04:41
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I'm a bit surprised that there are no comments on the latest HK Durafly release: the Messerschmitt Bf163 Komet. It has an optional rocket motor which should give club safety officers something to think about!

I also think the dropable dolly may have other applications such as pusher props to avoid the hazards of hand launching.

The video is here:

**LINK**

Edited By David Pearce 4 on 12/04/2015 11:06:57

Dave Hopkin12/04/2015 11:43:48
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Yep Komet owners are going to have many happy hours poking around in the long grass looking for the take off dolly wink

David Pearce 412/04/2015 21:13:51
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True, and a runway littered with pairs of dolly wheels would be a nuisance but I'd be interested in how the dolly works using a servo and magnet.

And I'm still surprised at the lack of interest here in the rocket power option . . .

Edited By David Pearce 4 on 12/04/2015 21:14:39

Dave Hopkin12/04/2015 21:20:57
3672 forum posts
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Looking at the HK video its not actually a "rocket" its a low power firework that just streams some smoke

Not quite sure how it would fit with the ANO though.....

Reno Racer12/04/2015 21:30:00
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I'm very tempted, although suspect if I did get one the fad of using the rocket, I suspect, would wear off fairly quickly. I does look like a cracking model though.

Bill_B12/04/2015 21:35:24
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Posted by Dave Hopkin on 12/04/2015 21:20:57:

Not quite sure how it would fit with the ANO though.....

Presumably the same as S8 class rocket gliders?

Frank Skilbeck12/04/2015 21:42:16
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Posted by Bill_B on 12/04/2015 21:35:24:
Posted by Dave Hopkin on 12/04/2015 21:20:57:

Not quite sure how it would fit with the ANO though.....

Presumably the same as S8 class rocket gliders?

I had the Estes rocket powered canard glider for a while, I only used the rocket motor for a few flights and added an electric pusher, as the cost per flight on a rocket motor was expensive sad but it was good fun.

Paul Marsh12/04/2015 22:23:23
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I've just ordered one!!!

Also bought a couple of LIpo packs with the order. Where do I get C60 estes rocket motors from?

steve c12/04/2015 23:01:22
20 forum posts

Ordered mine Friday and also ordered the rockets from model rocket shop got some spare ignitors as well just incase 'make sure you get the correct rockets ,apparently some of them have built in parachutes

6 rockets in a pack for£14.99 and they have a five second burn

John Payne13/04/2015 07:48:40
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Did anyone else notice that one of the channels on the box was the Rubber? Perhaps to make it bounce better on landing......... John.

David Pearce 413/04/2015 07:56:16
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Anyone using rockets with this should watch the latter part of the video carefully. The rocket should NEVER be installed before switching on as it will IGNITE when switching on. Do study the video carefully before considering buying rockets.  

Paul Marsh13/04/2015 18:00:17
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I'm going to add an arming plug, so there would be no way to ignite it without turning it on. Like on Robot Wars, needed a fool proof method if it being dead until it needed to.

Dizz13/04/2015 19:14:43
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Ordered mine last Thursday and it arrived on Friday. Built it and tested firing circuit yesterday, did an installed C6-0 rocket test firing in my mates back garden this afternoon and all went well. Going to try a B6-7 on the bench tomorrow with the intention of generating a longer smoke trail. Test flights are planned for Wednesday afternoon after work.

Overall I'm pretty impressed with the scale looks and thought that has gone into this model. The drop-off dolly uses the same release mechanism as the drop tanks on the Avios Sea Fury and they work faultlessly every time in my experience. Off course the dolly doesn't have to be released on the runway right after take of, it can be retained and dropped anywhere convenient/sensible. Slight niggles are the swasitka transfers and the under sized pilot figure, but at least they are provided I suppose.

I carried out comprehensive checks connecting flight pack and rocket ignition in different combinations both after and before tx was switched on. I used a voltmeter on the rc switch output and I did not get the same results as shown in the video: the output stayed 0v at all times until I pushed the button. NB there are 4 fail-safe settings available on the rc switch, so maybe he had the wrong one selected when he generated the flashing LEDS in his test in the video. I am using the recessed push-button (switch "I" )  on my DX18 to fire the rocket, so I haven't bothered with the faff of fitting a late arm switch.

Looking forward to getting this one in the air; certainly going to turn a few heads when the rocket fires

Edited By Dizz on 13/04/2015 19:15:08

David Pearce 413/04/2015 20:16:33
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Dizz, you make some interesting points in your posting.

One thing that isn't clear is how much thrust does the rocket provide or is it more for the smoke effect?

Edited By David Pearce 4 on 13/04/2015 20:18:36

Peter Christy13/04/2015 20:26:33
1615 forum posts

That looks great! I had one of the Rojair ones, many moons ago! It was great once you got it airborne, but Dave Wilshere was the only club member with a strong enough lob to get it away! It was also a pig to land, as the slightest uneveness in the ground would send it cartwheeling! This one looks a much better job.

Better start saving my pennies.......

--

Pete

Bill_B13/04/2015 22:08:20
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1145 forum posts
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What's the issue with swastika decals Dizz? Aren't any provided?

Edited By Bill_B on 13/04/2015 22:08:39

ted hughes14/04/2015 01:11:45
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Posted by Bill_B on 13/04/2015 22:08:20:

What's the issue with swastika decals Dizz? Aren't any provided?

Edited By Bill_B on 13/04/2015 22:08:39

I do know for a fact that some model airplane foamie manufacturers no longer produce the swastika as a decal, they use a small version of the black cross used on the wings and fuselage in its place.

This may be due to the fact that Nazi symbols are banned in Germany and Austria. This does mean the models are no longer historically accurate, and in fact the swastika is an old middle east peace symbol, so it does not really makes sense.

Dizz14/04/2015 18:35:05
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Posted by David Pearce 4 on 13/04/2015 20:16:33:

Dizz, you make some interesting points in your posting.

One thing that isn't clear is how much thrust does the rocket provide or is it more for the smoke effect?

Edited By David Pearce 4 on 13/04/2015 20:18:36

According to the Estes specs the C6 motor peaks at 14N (~1.4kg) thrust on ignition (I suspect due to the inreased surface area of the domed recess the igniter sits in) but then gives a steady 4.5N (~0.46kg) for the remainder of the burn. Overall burn is 1.8 seconds. I held the model yesterday during that test and you can feel the punch, but I really don't think it will make any difference in flight because it is such a short duration. Definitely for the "wow" effect.

Dizz14/04/2015 18:58:50
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167 forum posts
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Posted by Bill_B on 13/04/2015 22:08:20:

What's the issue with swastika decals Dizz? Aren't any provided?

Edited By Bill_B on 13/04/2015 22:08:39

They get around the sensitivities by splitting it top and bottom and it isn't easy to line up without leaving a gap/over lap. The transfers seem to be a cross between sticky vinyl and dry rub. They are nice and thin, but somewhat fragile. They do "grab" and when I tried to re-position one to line up properly it tore. The photo makes it look worse than it is, but it still annoys me.

20150411_191208.jpg

Edited By Pete B - Moderator on 14/04/2015 19:33:02

Paul Marsh14/04/2015 21:13:20
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3733 forum posts
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Well, mine came today, at work. Quite impressed with the speed it came, considering I only ordered in Sunday night and was off into the post by mid morning on Monday.

Also, regarding the Swasticas, I suppose it was to get round the sensitivities of having such a logo present, but still suppling it and upto the end use weather to use them or not and how they are arranged - quite cunning!

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