Friday, July 31, 2009

Rocket/jet car for breaking 1000mph

"RAF fighter pilot Andy Green intends to get behind the wheel of a car that is capable of reaching 1,000mph (1,609km/h). Powered by a rocket bolted to a Eurofighter-Typhoon jet engine, the Bloodhound car will mount an assault on the land speed record."

These are all fascinating attempts. The risk of catastrophic failure is very high, particularly by damage to the wheels or instability of trajectory. Readers may remember my previous post with the rocket powered bike. Rockets are able to send large objects to just about any speed, far greater than 1000 mph, but there are other complications. In order to go much faster (or indeed slower under most instances), the rocket must become a rocket sled. The challenge of guidance and stability are just too great at high speed. A person could reliably be sent to mach 3 on a rocket sled, if only a sled range long enough were constructed to maintain safe G loads accelerating and decelerating.

Dual thrust rocket car

Monday, July 27, 2009

A great SS2S dual burn test!

Wow! The technical challenges that this team is taking on are really impressive. Granted, you are always better off doing a dual stage rocket than dual burn, but it is a cool project anyway! I think they will make space in only a year or two more!

Friday, July 24, 2009

Why I love Giant Leap

This is the latest motor purchase, from the Giant Leap motor division. I am excited to get back into high power soon, now that I can store the motors without a LEUP (probably.) To do this, while also keeping my budget within reason, I purchased the smallest CES motor case that will fly H motors; the Cesaroni Pro29 Pro-X motor, 3g (3 grain). This motor case can now fly the following:

I decided on two Smoky Sam and two Skidmark motors, all G loads. There was a delay in shipping these items because of some complications with the supply of the motors... and to make up for it, GL not only kept me posted regularly, but they also threw in an H motor for free! Now technically, I am cert level 1. But it has been years since I have flown above an H, so this is like reading my mind. Can't wait to put the Graduator up on an H again! (Granted, this is one of the smallest H motors out there, basically a G with an extra gram of propellant.) In other words, thanks Giant Leap!

Wednesday, July 22, 2009

Astroland Rocket

Several times per year, I along with my friends and family have visited Coney Island. To see the beach, have a dog, get pizza, take a walk, or do many other things (now one can see a Cyclones game also). For years, there was a rocket above the boardwalk. After starting in rocketry, I couldn't help but notice when certain objects might make nice rockets. Telephone poles, lamp posts, oil tanks, the empire state building, and yes also this rocket model at Coney Island. To add to it, there were a number of large circles at the base of the rocket. Each one invited a guess on what motor would fit the hole, and what kind of power it would take for this rocket to really fly. The large central hole would be perfect for an S motor with lots of flame and smoke, and the many holes around it would work with fast P or Q motors to give it enough thrust on takeoff. The mass distributtion would have to be shifted a great deal to make it stable, and perhaps it could never really be stable with such small fins. Also, the total weight would probably have to be reduced by half or so: The rocket is 71 feet long, and 14,000 pounds. This would be a record indeed for a "hobby" rocket (it actually would break the hobby level based on motor impulse and rocket materials) and would approximate what one needs in a V2 full scale model. (Well much longer, but about as heavy.)

Update on rocket

Tuesday, July 21, 2009

After nearly 5 years of posting, Google has decided R2K should be suspended

After nearly 5 years of posting, with over 500 posts, Google has decided R2K should be suspended.

Hopefully the situation will be fixed quickly, and this post will be removed. Hopefully the next post on this matter will be me commending Google for doing the right thing, and supporting the freedom of bloggers to post what they want so long as it is legal. If not, see you all at another host.

Incredible "amateur" discovery on Jupiter

Amateur image of dark spot, now thought to be the result of an impact.

Astronomy is second to none among hobbies where amateurs regularly make discoveries. If you get an 8 - 12 inch telescope, live in a fairly good location, and perhaps build you own enclosure... all you need then is a CCD, computer, and lots of time and hard work to discover your own comet, asteroid, or supernova. It would be great if rocketry did a bit more innovating and less copying. The hobby is moving into some really new areas when it comes to composites, and also doing really well with miniaturization and electronics, but perhaps we could do more to expand into lost cost space exploration as well?

Thursday, July 16, 2009

Email from TRA RE. continued conflicts with the BATF

This is a letter sent out recently to certain TRA members.

"TRA Prefects:

I would like to urgently obtain some information related to any inappropriate BATFE actions which you may be aware of since the court judgment was considered "final" (May 15, 2009). I have already been informed of several cases where the agency has sent out obsolete materials for LEUP renewals (such at their "model rocketry" information from 2003), to cases where agents were planning to actually inspect a LEUP-holder's magazine containing APCP motors. While we have been dealing with these on a case-by-case basis, and forwarding the information to the legal team, the continued apparent failure of BATFE to enact the administrative changes required by the court judgment makes a recap of all known enforcement anomalies desirable.

Accordingly, it would be greatly appreciated if you could respond to me with information on any cases you or your members have experienced with BATFE in which the agency has acted in a manner inconsistent with the court judgment, which effectively required them to vacate APCP as a regulated explosive. Please include as much detail as you can, but at a minimum the following would be appreciated:

Name of member
BATFE office involved
BATFE agent name (if known)
Date of occurrence(s)
Brief description of incident
Member response (if any) to agent/agency Agency response (if any) to member response.

It would be appreciated if you could send me, or direct the member involved to send me, an e-mail response within the next 2 or 3 days (send to NAR members will also be requested for responses by Trip Barber, so in cases of dual membership, the message can be sent to both Trip and me.

If you have already reported this to me, please just re-send your original message so I will ensure I don't miss it in my accumulation of incidents.

With this information, we plan to escalate our objections to BATFE's inaction and possibly petition the US District Court for relief from the agency's frustrating lack of responsiveness to enacting changes required by that court's judgment.

Thanks for your assistance.

Ken Good"

Wednesday, July 15, 2009

Space X does it again!

This was the launch of "RazakSAT," a 180kg sattelite described as a "remote sensing" craft. It includes a solid camera, and was placed in a "NEqO" or Near Equitorial Orbit. Why? Because they want to see things in that area.


Thursday, July 9, 2009

5 interesting searches from today

- uk high power rocketry
- carbon fiber high powered rocket
- G80-13 rocket engine description
- Save Igloo
- unstable high power rocket video

I hope you all found what you wanted!

Wednesday, July 8, 2009

Interesting solid rocket designs

"The disadvantage of a solid fuel rocket is the whole block of solid fuel must be located inside a though rocket motor. This implies an excess of weight and of volume. Perhaps there is a way to avoid this drawback."

"One could smear a little bit of solid fuel inside the supersonic diverging nozzle (or inject some liquid fuel). The gasses produced by that additional fuel will be driven to supersonic speed by the gasses coming from the inside of the motor and they will be allowed to expand and accelerate inside the diverging nozzle just like the other gasses. (I believe so, which is not a proof.)"

"This implies the whole rocket motor can be made of solid rocket fuel."

Check out this and other great ideas on topics as wide ranging as rocketry and politics:

Including a proposal for finding extra-solar planets!
Solid rocket motors
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