Scratch LP V2

[Long_Gone]

So I lost an eBay v2 auction actually ten of them. We're too pricey for my blood. So i got pissed and fired up fusion 360 and cura and this happened. I'm working from scale drawings and odd sized tubes donated to me. So like in the past I'm creating a one off model.
Wish me luck

 

[Long_Gone]

I guess it is not as exciting as I think it is. No issues build goes on, made a new nosecone and almost cut the weight by half by upgrading to the new Cura. I will be designing the botail tomorrow and lasing the fins out. This is a test for a larger one if all goes well and I like it. I had one of the smaller V2's from Estes when I was a kid and it flew on a C and never came back floated a looooong way and is Long Gone.

 

[Long_Gone]

Progress

 

[Long_Gone]

I am extremely happy with the way the lased and printed parts turned out. Took some design time but looks good.

 

[mccoy300]

Parts dry fit look better than some kits, good job

 

[Long_Gone]

Yea right. Was really pissed that I could not buy a kit that I wanted, but they went for wayyyyyyy toooo much. So I had to stop being lazy and get er done!!!

 

[modeltrains]

No issues build goes on,

While that might make for low interaction rates with audiences, a no issues build is great for personal peace and contentment, at least it is when it happens to me.

 

[mccoy300]

While that might make for low interaction rates with audiences, a no issues build is great for personal peace and contentment, at least it is when it happens to me.

I don’t think I’ve ever had a build with no issues in my life

 

[Long_Gone]

Well tomorrow or Sunday we will get er done and flying on some Qwest engines that I have in 18mm. Got a couple D's in 18mm and they rip!!! Ok Ok I gotta go to sleep.
Later folks

 

[Long_Gone]

Die Wunderwaffe ist fast fertig

 

[Long_Gone]

 

[Long_Gone]

Applying paint one of many started and will be mostly sanded off till im happy.

 

[Long_Gone]

It's getting there

 

[Long_Gone]

Fingers crossed till it dries. That is super black paint!

 

[Long_Gone]

Touch up will be necessary. I thought it would work this time because i used frog tape. Oh well. I wanted to use electrical tape.... Sucks

 

[Long_Gone]

Looking good, just some clean up and the silver rings need to be applied.

 

[Hobie1dog]

Nice build, Thanks for all the photos

 

[Long_Gone]

Making modifications and sending it tomorrow on B4-4, B6-4.....

 

[Long_Gone]

looks like I have another made from rejected parts so why not build and fly it. So I did. So one will not be painted tomorrow. Both swing tested ok. OR says 75' on an A8-3 and 250' on a B4-4. Sending them both.

 

[Long_Gone]

Well the A8-3 flight was ok but delay was almost a disaster but pulled it out in the end. The B4-4 on both in spite of the swing test saying it's ok it was not and flew straight for 75' then both took a right for 300' . So I'm re thinking everything, looking at A10 engines and looking to lighten everything in the rear so I will be using 1/6th balsa instead of 1/8th etc........the current rockets are 2.5 and 3 oz respectively but the cg is scary!!!!! Need to change that with out gobs of nose weight need a smart design on an old rocket.

 

[lakeroadster]

Tell me more about that swing test... did you tip the nose down 10-15 degrees? TR-1

"Small wind gusts or engine misalignment can cause a rocket that checks out stable when started by hand as described above to be unstable in flight. To be sure that the rocket’s stability is sufficient to overcome these problems, the rocket is swung overhead in a state of slight imbalance. Experiments indicate that a single engined rocket will have adequate stability for a safe flight if it remains stable when the above test is made with the rocket rebalanced so the nose drops below the tail with the rocket body at an angle of 10 degrees from the horizontal (see Fig. 8). With cluster powered rockets a greater degree of stability is needed since the engines are mounted off center. The cluster-powered rocket should be stable when imbalanced to hang at 15 degrees from the horizontal. Heavier rockets which accelerate at a lower rate require a similar margin of stability"​

​

​

 

[Long_Gone]

I did not because I was smart to the contrary I was lazy and said a little nose down is good and let her rip. No measurements at all. now trying to achieve the correct angle will require lots of clay/lead and that is not good. I need to rethink what I am doing. Basically lighter tail section. I need to locate the actual CP/CG relationship and see if I am in the ball park OR was not letting me create the rocket exactly like I wanted to (crappy skills).

 

[Long_Gone]

Look at that CP and CG on top of each other. I trusted OR with my crappy design OR skills designed in error. Ok proves my point lighter rocket lighter tail. Now on to fusion 360.

 

[Long_Gone]

Was a cool flight though. No crash just looked like a cruise missile!!!!!

 

[John Kemker]

As a vinyl enthusiast, the title to this thread caused me to do a double-take!

 

[Long_Gone]

Low Powa!!!!!!!