Re: [Aus-soaring] jetpack

2015-11-10 Thread Erich Wittstock 
..blinds were closed during night flights in a super connie - so passenger
would not freak out by the fire from the mufflers (if you can call them
mufflers)

here is something else about jetpacks close to wingtips:
https://www.youtube.com/watch?v=_VPvKl6ezyc=FL2HgIG2OraGNOhz2DFLqeHw=1

On Wed, Nov 11, 2015 at 10:07 AM, Mike Borgelt <
mborg...@borgeltinstruments.com> wrote:

> I ran into this when checking the AMT website a few days ago
> www.amtjets.com
>
> Then did a search and this article seems one of the better ones with some
> technical detail and photos.
>
> http://www.gizmag.com/jetpack-aviation-new-york-flight/40286/
>
> Made ABC  news online this morning too.
>
> What I found amazing as that I though his autostab and control system must
> be pretty good as it seems to fly so smoothly and steadily but as the
> article makes clear there isn't one. Astounding!
>
> Those AMT Nike engines are 80 Kg thrust each and two, as on the jetpack,
> will happily launch the heaviest Open Class gliders with good single engine
> performance.
>
> As is being shown by Yves Rossi and now David Mayman, the engines seem to
> be robust and give little operational trouble.
>
> Mike
>
>
>
> *Borgelt Instruments* -
> *design & manufacture of quality soaring instrumentation since 1978 *
> www.borgeltinstruments.com
> tel:   07 4635 5784 overseas: int+61-7-4635 5784
> mob: 042835 5784 :  int+61-42835 5784
> P O Box 4607, Toowoomba East, QLD 4350, Australia
>
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Re: [Aus-soaring] jetpack

2015-11-10 Thread Mike Borgelt 



Now to combine the Rossi wing with the Mayman 
jetpack and get vertical takeoff and landing and wingborne flight.


I'd want a ballistic parachute too.

Mike




At 09:29 AM 11/11/2015, you wrote:
..blinds were closed during night flights in a 
super connie - so passenger would not freak out 
by the fire from the mufflers (if you can call them mufflers)


here is something else about jetpacks close to wingtips:
https://www.youtube.com/watch?v=_VPvKl6ezyc=FL2HgIG2OraGNOhz2DFLqeHw=1

On Wed, Nov 11, 2015 at 10:07 AM, Mike Borgelt 
<mborg...@borgeltinstruments.com> 
wrote:
I ran into this when checking the AMT website a 
few days ago www.amtjets.com


Then did a search and this article seems one of 
the better ones with some technical detail and photos.


http://www.gizmag.com/jetpack-aviation-new-york-flight/40286/

Made ABCÂ  news online this morning too.

What I found amazing as that I though his 
autostab and control system must be pretty good 
as it seems to fly so smoothly and steadily but 
as the article makes clear there isn't one. Astounding!


Those AMT Nike engines are 80 Kg thrust each and 
two, as on the jetpack, will happily launch the 
heaviest Open Class gliders with good single engine performance.


As is being shown by Yves Rossi and now David 
Mayman, the engines seem to be robust and give little operational trouble.


Mike



Borgelt Instruments - design & manufacture of 
quality soaring instrumentation since 1978

www.borgeltinstruments.com
tel:Â Â  07 4635 5784Â Â Â Â Â overseas: int+61-7-4635 5784
mob: 042835 5784Â Â Â Â Â Â Â Â  Â Â Â Â Â Â Â Â :Â  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia

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quality soaring instrumentation since 1978

www.borgeltinstruments.com
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784:  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia  ___
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Re: [Aus-soaring] jetpack

2015-11-10 Thread Mike Borgelt 

I ran into this when checking the AMT website a few days ago www.amtjets.com

Then did a search and this article seems one of the better ones with 
some technical detail and photos.


http://www.gizmag.com/jetpack-aviation-new-york-flight/40286/

Made ABC  news online this morning too.

What I found amazing as that I though his autostab and control system 
must be pretty good as it seems to fly so smoothly and steadily but 
as the article makes clear there isn't one. Astounding!


Those AMT Nike engines are 80 Kg thrust each and two, as on the 
jetpack, will happily launch the heaviest Open Class gliders with 
good single engine performance.


As is being shown by Yves Rossi and now David Mayman, the engines 
seem to be robust and give little operational trouble.


Mike




Borgelt Instruments - design & manufacture of quality soaring 
instrumentation since 1978

www.borgeltinstruments.com
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784:  int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia  ___
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Re: [Aus-soaring] jetpack

2015-11-10 Thread Simon Hackett 
Just FYI…

I’ve exchanged some messages with David about his jetpack (for a while now). 

They are in fact working on incorporating a ballistic parachute.

Cheers, 
 Simon

> On 11 Nov 2015, at 10:39 AM, Mike Borgelt  
> wrote:
> 
> 
> 
> Now to combine the Rossi wing with the Mayman jetpack and get vertical 
> takeoff and landing and wingborne flight.
> 
> I'd want a ballistic parachute too.
> 
> Mike
> 
> 
> 
> 
> At 09:29 AM 11/11/2015, you wrote:
>> ..blinds were closed during night flights in a super connie - so passenger 
>> would not freak out by the fire from the mufflers (if you can call them 
>> mufflers)
>> 
>> here is something else about jetpacks close to wingtips:
>> https://www.youtube.com/watch?v=_VPvKl6ezyc=FL2HgIG2OraGNOhz2DFLqeHw=1
>>  
>> 
>>  
>> 
>> On Wed, Nov 11, 2015 at 10:07 AM, Mike Borgelt < 
>> mborg...@borgeltinstruments.com > 
>> wrote:
>> I ran into this when checking the AMT website a few days ago www.amtjets.com
>> 
>>  
>> Then did a search and this article seems one of the better ones with some 
>> technical detail and photos.
>> 
>> http://www.gizmag.com/jetpack-aviation-new-york-flight/40286/ 
>> 
>> 
>> Made ABCÂ  news online this morning too.
>> 
>> What I found amazing as that I though his autostab and control system must 
>> be pretty good as it seems to fly so smoothly and steadily but as the 
>> article makes clear there isn't one. Astounding!
>> 
>> Those AMT Nike engines are 80 Kg thrust each and two, as on the jetpack, 
>> will happily launch the heaviest Open Class gliders with good single engine 
>> performance.
>> 
>> As is being shown by Yves Rossi and now David Mayman, the engines seem to be 
>> robust and give little operational trouble. 
>> 
>> Mike
>> 
>> 
>> 
>> Borgelt Instruments - design & manufacture of quality soaring 
>> instrumentation since 1978
>> www.borgeltinstruments.com
>>  
>> tel:Â Â  07 4635 5784Â Â Â Â Â overseas: int+61-7-4635 5784
>> mob: 042835 5784Â Â Â Â Â Â Â Â  Â Â Â Â Â Â Â Â :Â  int+61-42835 5784
>> P O Box 4607, Toowoomba East, QLD 4350, Australia 
>> 
>> ___
>> Aus-soaring mailing list
>> Aus-soaring@lists.internode.on.net 
>> 
>> To check or change subscription details, visit:
>> http://lists.internode.on.net/mailman/listinfo/aus-soaring 
>> 
>> 
>> 
>> ___
>> Aus-soaring mailing list
>> Aus-soaring@lists.internode.on.net
>> To check or change subscription details, visit:
>> http://lists.internode.on.net/mailman/listinfo/aus-soaring 
>> Borgelt 
>> Instruments - design & manufacture of quality soaring instrumentation since 
>> 1978
> www.borgeltinstruments.com
>  tel:   07 4635 5784 overseas: 
> int+61-7-4635 5784
> mob: 042835 5784 :  int+61-42835 5784
> P O Box 4607, Toowoomba East, QLD 4350, Australia
> 
> ___
> Aus-soaring mailing list
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Re: [Aus-soaring] The Speight papers

2015-11-10 Thread Mike Borgelt 
We were delighted to receive a hard copy bound book of the Speight 
Papers that just arrived

As I don't have a current email address for Garry, I'll say thanks here.
Some of the photos are interesting and bring back memories!
The rest of you, if you're interested in soaring cross country 
faster, should read them.


Mike







Borgelt Instruments - design & manufacture of quality soaring 
instrumentation since 1978

www.borgeltinstruments.com
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784:  int+61-42835 5784
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Re: [Aus-soaring] jetpack

2015-11-10 Thread Mike Borgelt 

At 01:14 PM 11/11/2015, you wrote:

>>They are in fact working on incorporating a ballistic parachute.

Bang goes the idea of jogging with the jetpack on then!

It will be an interesting trade-off between duration of opening and
speed which it can open at.

The design of a backup parachute of something like a hang glider gives
very rapid opening in a short distance but at comparatively low speed
because the glider slows the descent.

With something like the jetpack, if and when you need to deploy the
chute, you'll be plummeting fast so you'll need a staged deployment
which takes some time so the distance which you fall is considerable.



Depends how you will deploy the chute. If automatic such as an engine 
fail detect while more than say 10 feet off the ground you might be 
under canopy within 1 second.

The Yak 38 I think had an automatic ejection seat in vertical flight mode.

I have a friend who lives about a kilometer from me who manufactures 
parachutes of all kinds including for uses he can't talk about. He 
has an idea that a small chute on a glider to limit terminal velocity 
and vertical G load would enable you to get out and deploy your 
normal parachute.
Worth investigating as a chute to bring a whole glider and pilot down 
is much larger and heavier than one to reduce terminal velocity to 
say 40 knots.


For the jet pack plus wings idea you might want another smaller 
engine for cruise and shut down the vertical lift engines. Jets don't 
deep throttle well as the SFC goes from poor to terrible below about 
70% thrust.


Mike



Borgelt Instruments - design & manufacture of quality soaring 
instrumentation since 1978

www.borgeltinstruments.com
tel:   07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784:  int+61-42835 5784
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Re: [Aus-soaring] jetpack

2015-11-10 Thread DMcD 
>>They are in fact working on incorporating a ballistic parachute.

Bang goes the idea of jogging with the jetpack on then!

It will be an interesting trade-off between duration of opening and
speed which it can open at.

The design of a backup parachute of something like a hang glider gives
very rapid opening in a short distance but at comparatively low speed
because the glider slows the descent.

With something like the jetpack, if and when you need to deploy the
chute, you'll be plummeting fast so you'll need a staged deployment
which takes some time so the distance which you fall is considerable.

I think an HG deployment can be done in a few hundred feet from throw
to slow but with a heavier, faster descent the distance stretches out
to something closer to a thousand which is a long way to fall.

With gliders getting heavier by the week, I wonder why manufacturers
don't revisit the ballistic chute idea. I understand that if it's a
certified aircraft, then you don't need a chute but if you are not,
then for an LSA to fly in Europe, you do need a ballistic chute. Is
this correct?

What about things like the Silent Electro etc. ? Do they have ballistic chutes?

D
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