WM MGM-52 Lance 5

[DHays]

Maybe I am overlooking the Open Rocket file for this kit. I can't seem to find it. So I put all of the major components in Open Rocket to see where the CP is. With 16 oz of nose weight and loaded with a L-1420 motor, it is showing that the CP and the CG are basically sitting on top of one another. It came out to -0.048.
So basically I didn't know if anyone has the OR file for this rocket, or if anyone has built this kit and flown it with several different motors and recorded the altitudes. Or if nothing else, I just need the CP location.

Thank you!

 

[DHays]

I got it figured out.

 

[rfjustin]

@jd2cylman can comment here for (2) and (3) grain 75mm loads in his...

 

[neil_w]

I got it figured out.

What was the problem?

 

[jd2cylman]

Sorry work got in the way of hobby.
Yep no nose weight. I’ve flown mine on AT L850W, AT K1000B, and research 75mm 3 grain L1000 ish. Highest flight was the research L at 10,800ish. My favorite flight was the K1000, just cause I could see it the whole time.

 

[WILDMANRS]

@jd2cylman can comment here for (2) and (3) grain 75mm loads in his...

i flew mine on the 4g load last airfest

Sorry work got in the way of hobby.
Yep no nose weight. I’ve flown mine on AT L850W, AT K1000B, and research 75mm 3 grain L1000 ish. Highest flight was the research L at 10,800ish. My favorite flight was the K1000, just cause I could see it the whole time.

no nose weight needed on the L1420 either

 

[jd2cylman]

i flew mine on the 4g load last airfest

no nose weight needed on the L1420 either

Yeah, I’m wimpy… 4 grain someday…

 

[WILDMANRS]

are you

Yeah, I’m wimpy… 4 grain someday…

are you bringing your goblin?

 

[WILDMANRS]

im bringing both lance and goblin

 

[DHays]

@jd2cylman can comment here for (2) and (3) grain 75mm loads in his...

Ok cool, thank you!

 

[DHays]

What was the problem?

It was me. I am still learning all the in's and out's of Open Rocket. I found the tutorial and that helped me a lot. I didn't get my fin size right and didn't have the proper weights for the components. And component material. Maybe it's normal, but I am getting different altitudes between OR and Thrust Curve. So once I actually do fly, I will record everything for my particular rocket.

 

[DHays]

What was the problem?

Also, I know the Lance flies awesome because I saw one at the last Bong launch in Wisconsin.

 

[DHays]

Sorry work got in the way of hobby.
Yep no nose weight. I’ve flown mine on AT L850W, AT K1000B, and research 75mm 3 grain L1000 ish. Highest flight was the research L at 10,800ish. My favorite flight was the K1000, just cause I could see it the whole time.

I hate when work gets in the way of the hobby, lol

Thank you for the info.

So on yours, are you using the 1/4 x 20'Tubular Kevlar for the HED?

And did you attach your main chute directly to the top of the av-bay lid?

Thanks for the info!

 

[neil_w]

It was me. I am still learning all the in's and out's of Open Rocket. I found the tutorial and that helped me a lot. I didn't get my fin size right and didn't have the proper weights for the components. And component material. Maybe it's normal, but I am getting different altitudes between OR and Thrust Curve. So once I actually do fly, I will record everything for my particular rocket.

The drag coefficient on Thrustcurve.org is just a guess, whereas on OpenRocket it is modeled and calculated. If you've entered things correctly, OR should give you a more accurate result, unless somehow you now the exact Cd of your rocket and can enter it into Thrustcurve.org.

If you have any questions about your OR model just post the file here and we can review.

 

[DHays]

The drag coefficient on Thrustcurve.org is just a guess, whereas on OpenRocket it is modeled and calculated. If you've entered things correctly, OR should give you a more accurate result, unless somehow you now the exact Cd of your rocket and can enter it into Thrustcurve.org.

If you have any questions about your OR model just post the file here and we can review.

I appreciate it!

Thank you

 

[WILDMANRS]

The rocksim file should be on the website now .

 

[jd2cylman]

I hate when work gets in the way of the hobby, lol

Thank you for the info.

So on yours, are you using the 1/4 x 20'Tubular Kevlar for the HED?

And did you attach your main chute directly to the top of the av-bay lid?

Thanks for the info!

Yup, 1/4" Kevlar in the nose. For HED builds, I ALWAYS fasten the chute to the AV bay lid. No exceptions. Ejection charge holders in the tip of the nose. If the nosecone comes off, the chute is out. It'll be the same way on my 6" Punisher too.

 

[DHays]

The rocksim file should be on the website now .

Yep it is. Thank you!

Have fun in Argonia

 

[DHays]

Yup, 1/4" Kevlar in the nose. For HED builds, I ALWAYS fasten the chute to the AV bay lid. No exceptions. Ejection charge holders in the tip of the nose. If the nosecone comes off, the chute is out. It'll be the same way on my 6" Punisher too.

Sounds great. I will set mine up that way.

Thank you!