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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
A deployed set of spinning winglets as tethered to the nose section of any first-stage can be deployed shortly after separation, as offering a robust rotor-wing phase deceleration method, whereas the amount of active rotor-wing trim/attack angle and subsequent aerodynamic drag is fully adjusted to suit the best deceleration possible without exceeding winglet loading issues..
Upon nearing the ground (last km), the fly-by-rocket thrusters takeover and those spinning rotor blades as tethered winglets are released and most likely also recoverable. Deploy-able as tethered rotor-wings can likely be limited as to not more than .1% the gross mass of the first stage. Gross mass of the Saturn 5 being 5,000,000 lbs might require a tethered rotor-wing module of 5,000 lbs in order to properly stabilize and decelerate perhaps 350,000 lbs down to the lower elevation of 1 km. Seems like a small enough inert mass price to pay for having fully recovered the spendy first stage as on land instead of trashed in the ocean. The idea here is to fully stabilize the decent and keeping its velocity well below supersonic speed by the time it reaches 1 km. Of course if the entire Saturn 5 first stage can be outfitted with vertical sliding rotor-wings that would deploy by sliding upward and gradually begin to open up, might be a even better articulated winglet application, because then everything becomes compact and reusable. Of greatly improved fly-by-rocket structural engineering and composites would likely make the new Saturn 5 (2.0) with its deployable rotor wings of sufficiently less all-inclusive inert mass, so as to more than offset the added inert mass of these deployable rotor-wings. If they can make their V-22 Osprey fiasco fly via brute force and unlimited funding (similar to those F35s that no one can afford to own and operate), then perhaps rotor-winglets for a fully recoverable first stage rocket are not going to be as insurmountable as we might think. |
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
On Tuesday, April 29, 2014 4:43:40 PM UTC-4, Brad Guth wrote:
A deployed set of spinning winglets as tethered to the nose section of any first-stage can be deployed shortly after separation, as offering a robust rotor-wing phase deceleration method, whereas the amount of active rotor-wing trim/attack angle and subsequent aerodynamic drag is fully adjusted to suit the best deceleration possible without exceeding winglet loading issues. Upon nearing the ground (last km), the fly-by-rocket thrusters takeover and those spinning rotor blades as tethered winglets are released and most likely also recoverable. Deploy-able as tethered rotor-wings can likely be limited as to not more than .1% the gross mass of the first stage. Gross mass of the Saturn 5 being 5,000,000 lbs might require a tethered rotor-wing module of 5,000 lbs in order to properly stabilize and decelerate perhaps 350,000 lbs down to the lower elevation of 1 km. Seems like a small enough inert mass price to pay for having fully recovered the spendy first stage as on land instead of trashed in the ocean. The idea here is to fully stabilize the decent and keeping its velocity well below supersonic speed by the time it reaches 1 km. Of course if the entire Saturn 5 first stage can be outfitted with vertical sliding rotor-wings that would deploy by sliding upward and gradually begin to open up, might be a even better articulated winglet application, because then everything becomes compact and reusable. Of greatly improved fly-by-rocket structural engineering and composites would likely make the new Saturn 5 (2.0) with its deployable rotor wings of sufficiently less all-inclusive inert mass, so as to more than offset the added inert mass of these deployable rotor-wings. If they can make their V-22 Osprey fiasco fly via brute force and unlimited funding (similar to those F35s that no one can afford to own and operate), then perhaps rotor-winglets for a fully recoverable first stage rocket are not going to be as insurmountable as we might think. probably better to make the booster a flyback one with wings. Its good that alternative ideas are being explored. sad that more havent been adopted years ago to cut costs |
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
On Tuesday, April 29, 2014 5:40:13 PM UTC-7, bob haller wrote:
On Tuesday, April 29, 2014 4:43:40 PM UTC-4, Brad Guth wrote: A deployed set of spinning winglets as tethered to the nose section of any first-stage can be deployed shortly after separation, as offering a robust rotor-wing phase deceleration method, whereas the amount of active rotor-wing trim/attack angle and subsequent aerodynamic drag is fully adjusted to suit the best deceleration possible without exceeding winglet loading issues. Upon nearing the ground (last km), the fly-by-rocket thrusters takeover and those spinning rotor blades as tethered winglets are released and most likely also recoverable. Deploy-able as tethered rotor-wings can likely be limited as to not more than .1% the gross mass of the first stage. Gross mass of the Saturn 5 being 5,000,000 lbs might require a tethered rotor-wing module of 5,000 lbs in order to properly stabilize and decelerate perhaps 350,000 lbs down to the lower elevation of 1 km. Seems like a small enough inert mass price to pay for having fully recovered the spendy first stage as on land instead of trashed in the ocean. The idea here is to fully stabilize the decent and keeping its velocity well below supersonic speed by the time it reaches 1 km. Of course if the entire Saturn 5 first stage can be outfitted with vertical sliding rotor-wings that would deploy by sliding upward and gradually begin to open up, might be a even better articulated winglet application, because then everything becomes compact and reusable. Of greatly improved fly-by-rocket structural engineering and composites would likely make the new Saturn 5 (2.0) with its deployable rotor wings of sufficiently less all-inclusive inert mass, so as to more than offset the added inert mass of these deployable rotor-wings. If they can make their V-22 Osprey fiasco fly via brute force and unlimited funding (similar to those F35s that no one can afford to own and operate), then perhaps rotor-winglets for a fully recoverable first stage rocket are not going to be as insurmountable as we might think. probably better to make the booster a flyback one with wings. Its good that alternative ideas are being explored. sad that more havent been adopted years ago to cut costs I'd proposed the fully fly-back (mostly glide-back) alternative several years ago. As per Usenet/newsgroup policy of status-quo naysay or bust, it got shot down before even being considered. I'd still prefer the fly-back method via fold-out wings (rocket engine mass facing forward). |
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
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First-stage recovery using minimal Delta-v budget: tethered rotor-wings
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