lalligood
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OK, I've mentioned in a couple of threads that I've been working on a U.S. Rockets El Lubbo. I suppose now would be a good time to present the fruits of my labor. Actually it isn't finished yet, but I am in the midst of putting the final coats of glossy paint on it...
First off, the El Lubbo is a true builder's kit and is certainly unlike anything I have built before. That is because there is no plastic or balsa nose cone! You have to (ready for this?) make it from a piece of tubing.
Say what...??
You heard me correctly. The nose cone is fabricated from a piece of 4" tubing. USR has some excellent documentation included with the kit on creating transitions, boat tails, and even nose cones from tubing. It is not a fast process to do this. Those looking for a quick build, please pass on by...These are not the droids you are looking for. Something like that anyway
While labor intensive, you are going to have a rocket unlike any other at the field.
Bottom line is imagine a 4" diameter and almost 4" tall rocket with a 29mm motor mount. Sounds like your typical L1 cert bird, right? OK, now imagine the suprise when you find out that it weighs WELL *UNDER* ONE POUND. How is this done? Well, with the nose cone made from a piece of tubing, the boat tail uses the same technique to be created--and that design feature allows for the 1/4" thick solid balsa fins to have plenty of support. The conical nose cone and boat tail should make up nicely for any performance loss from the large diameter tubing too.
The El Lubbo (as the builder is carefully warned in the instruction manual) that motors with average thrust greater than 20 pounds should not be used. So anything up to a G80 should work fine. There is even a 29-24mm motor adapter so I bet you could even get it off the ground on something like a E15. Would a D12-3 work?!? Maybe? I'll probably stick to G64s though Long burning, low thrust motors
With the complicated build techniques, I would NOT recommend this kit to beginners. I have logged quite a few hours into getting this one built, but it has been worth it!
See below for pics...
First off, the El Lubbo is a true builder's kit and is certainly unlike anything I have built before. That is because there is no plastic or balsa nose cone! You have to (ready for this?) make it from a piece of tubing.
Say what...??
You heard me correctly. The nose cone is fabricated from a piece of 4" tubing. USR has some excellent documentation included with the kit on creating transitions, boat tails, and even nose cones from tubing. It is not a fast process to do this. Those looking for a quick build, please pass on by...These are not the droids you are looking for. Something like that anyway
While labor intensive, you are going to have a rocket unlike any other at the field.Bottom line is imagine a 4" diameter and almost 4" tall rocket with a 29mm motor mount. Sounds like your typical L1 cert bird, right? OK, now imagine the suprise when you find out that it weighs WELL *UNDER* ONE POUND. How is this done? Well, with the nose cone made from a piece of tubing, the boat tail uses the same technique to be created--and that design feature allows for the 1/4" thick solid balsa fins to have plenty of support. The conical nose cone and boat tail should make up nicely for any performance loss from the large diameter tubing too.
The El Lubbo (as the builder is carefully warned in the instruction manual) that motors with average thrust greater than 20 pounds should not be used. So anything up to a G80 should work fine. There is even a 29-24mm motor adapter so I bet you could even get it off the ground on something like a E15. Would a D12-3 work?!? Maybe?
I'll probably stick to G64s though Long burning, low thrust motors With the complicated build techniques, I would NOT recommend this kit to beginners. I have logged quite a few hours into getting this one built, but it has been worth it!
See below for pics...
