[roc-chat] Re: Sounding Rockets and ROCstock Nikes
- From: Kurt Gugisberg <kurtgug@xxxxxxxxx>
- To: "roc-chat@xxxxxxxxxxxxx" <roc-chat@xxxxxxxxxxxxx>
- Date: Wed, 29 Jan 2014 13:56:41 -0800
It's not easy, nearly impossible.
*Also, you won't get nearly the altitude you would if you ignited the
second stage when it's still mostly vertical -- you should ask Kurt how
easy it is to keep multi-stage rockets vertical :-)*
Kurt
On Wed, Jan 29, 2014 at 1:30 PM, Mike Riss <rockt_dude@xxxxxxxxxxxxx> wrote:
> Chris,
>
> You're right about the "reality" part.
>
> If you watch any single-stage rocket flight, most start to arc after a
> short time while they're coasting. This arc becomes more pronounced when
> the powered portion isn't vertical to start with.
>
> If this happens to your second stage, recovery will likely be much further
> away, and at a horizontal speed that might cause damage to the recovery
> gear during deployment.
>
> Also, you won't get nearly the altitude you would if you ignited the
> second stage when it's still mostly vertical -- you should ask Kurt how
> easy it is to keep multi-stage rockets vertical :-)
>
> Mike
>
> ------------------------------
> *From:* Chris J Kobel <Chris.J.Kobel@xxxxxxxx>
> *To:* roc-chat@xxxxxxxxxxxxx
> *Sent:* Wednesday, January 29, 2014 10:58 AM
> *Subject:* [roc-chat] Re: Sounding Rockets and ROCstock Nikes
>
> You should ask Kurt how easy it is to program in an ignition delay for a
> multi-stage vehicle. Sure, it offers great performance in the simulation,
> but I think it's tougher to do in reality.
>
> From: R Dierking <applerocketry@xxxxxxxxxxx>
> To: "roc-chat@xxxxxxxxxxxxx" <roc-chat@xxxxxxxxxxxxx>,
> Date: 01/29/2014 10:46 AM
> Subject: [roc-chat] Re: Sounding Rockets and ROCstock Nikes
> Sent by: roc-chat-bounce@xxxxxxxxxxxxx
> ------------------------------
>
> So, I wonder why we don't see more 2 stage rockets at Lucerne (and other
> launches as well), that have a large booster, then small sustainer after an
> appropriate coast period. Like a K to a H impulse. Sure, it looks cool
> lighting the 2nd stage right after boost, but a properly stabilized 2 stage
> rocket that was designed to light the sustainer after coast to less dense
> atmosphere could reach the top of the high-alt waiver at Lucerne.
>
>
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