NOSE WEIGHT FOR LOC 4” V2

[JoeFilgas]

Hi all, am finishing up my LOC 4” V2 project and I created a new .ork file in Open Rocket because the .rkt file for same from Apogee Components (.rkt converted to .ork) was not working properly. My new version works as it should finally. Unfortunately OR is calling for 13oz of nose weight for a stability of 1.07. I ran simulations for various successful Aerotech G motors. I’m also running a 38mm to 29mm aluminum motor adapter along with an aluminum retainer all by Aero Tek. All of this is accounted for in Open Rocket. I’m wondering what weight you ended up with on this rocket if you’ve built and flown the same successfully. Thanks so much! Joe

 

[mtnmanak]

I can't speak for the 4" LOC V2, but I have built a number of HPR V2's. including the LOC 7.5" V2, and they pretty much always need some NC weight for stability, although there is some utility in looking at the research/data that show your don't need a full caliber of stability with shorter/fat rockets with large fins.

Easiest thing to do is throw some nose weight in there and feel good about the extra margin of stability. For the larger V2, I use a NC fitted with LOC's removeable nose weight system. They make a version for the 4" NC's and, I think, it is nice to have one on hand. Once you make one NC using the RNWS, you can move it from rocket to rocket and change the nose weight, as needed.

 

[waltr]

If adding weight to a nose cone, be sure to evaluate the shock cord nose attachment point.
Seen a few 'stock loop' on nose cones break with nose weight added.

 

[sharkbait]

Hi all, am finishing up my LOC 4” V2 project and I created a new .ork file in Open Rocket because the .rkt file for same from Apogee Components (.rkt converted to .ork) was not working properly. My new version works as it should finally. Unfortunately OR is calling for 13oz of nose weight for a stability of 1.07. I ran simulations for various successful Aerotech G motors. I’m also running a 38mm to 29mm aluminum motor adapter along with an aluminum retainer all by Aero Tek. All of this is accounted for in Open Rocket. I’m wondering what weight you ended up with on this rocket if you’ve built and flown the same successfully. Thanks so much! Joe

My Level 1 was a 4” Loc V-2, put 1 pound (16oz) in the nose, always flys perfectly no matter what motor I stick in it

 

[David Schwantz]

I have several V 2's, LOC 5.5" with 2lbs in NC, scratch built 2.5" with 10 oz in NC, Scratch built 12" with 25lbs in NC

 

[JoeFilgas]

I can't speak for the 4" LOC V2, but I have built a number of HPR V2's. including the LOC 7.5" V2, and they pretty much always need some NC weight for stability, although there is some utility in looking at the research/data that show your don't need a full caliber of stability with shorter/fat rockets with large fins.

Easiest thing to do is throw some nose weight in there and feel good about the extra margin of stability. For the larger V2, I use a NC fitted with LOC's removeable nose weight system. They make a version for the 4" NC's and, I think, it is nice to have one on hand. Once you make one NC using the RNWS, you can move it from rocket to rocket and change the nose weight, as needed.

Thank you I had no idea such a product existed. When/if I ever get certified I could easily make up a second cone with this system.

 

[JoeFilgas]

I have several V 2's, LOC 5.5" with 2lbs in NC, scratch built 2.5" with 10 oz in NC, Scratch built 12" with 25lbs in NC

Thanks sounding like this is normal.

 

[JoeFilgas]

My Level 1 was a 4” Loc V-2, put 1 pound (16oz) in the nose, always flys perfectly no matter what motor I stick in it

Wow thank you for responding!

 

[JoeFilgas]

If adding weight to a nose cone, be sure to evaluate the shock cord nose attachment point.
Seen a few 'stock loop' on nose cones break with nose weight added.

Thank you! I’ve modified mine with a conversion to a 1/4” ply bulkhead and metal eyelet system.

 

[MikeT]

https://locprecision.com/products/rnws?variant=44181190279401

 

[JoeFilgas]

https://locprecision.com/products/rnws?variant=44181190279401

Thanks for the reply. This looks like a fantastic product and eventual solution!