My club is still not launching, but I do hope to have it ready when we do. I would rather it be above 60 degrees (70 is better) when I paint, so I'm trying to be patient with the weather... BUT IT IS HARD.
My Madcow 2.6 Bomarc build thread
- Thread starter Wally Ferrer
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Where do you live? I always have decent weather.My club is still not launching, but I do hope to have it ready when we do. I would rather it be above 60 degrees (70 is better) when I paint, so I'm trying to be patient with the weather... BUT IT IS HARD.
Just outside of Washington D.C., hovering in the upper 50's today...
G-Dog
RatDog Rocketry
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We'll have 70's in the mid-atlantic soon enough, and you can't go wrong with the black/white paint scheme in my opinion. I was 'supposed' to be done with the primer on mine by now, but the seam for the BT's isnt up to snuff yet.
Are you going to use the decals with the kit, or go another route ? I'm still debatiing...
Are you going to use the decals with the kit, or go another route ? I'm still debatiing...
I'm going with the kit decals. I still see dings and dents and tiny slivers of spiral here and there, but I'm just giving it another day to dry due to temperature before I start with a bit of white.
Ok, don't forget to post a picture of it when it is on your club's pad.
Been having nice weather here in the mid to upper 70's
Added white to the wingtips and tail yesterday, but still not cured enough to mask for the black. Maybe tomorrow, it just broke 70 degrees here...
After trying to catch up on some household chores, I managed to mask some white areas and spray some black...
I gave it another day before I painted the ramjets silver. I now need calculate how much nose weight to add and get that done before finishing the nose cone paint.
Progress...
Nytrunner
Pop lugs, not drugs
Looking slick!
Beautiful!
Thanks, everyone. Now I need to figure out some nose weight and get the cone painted, add some decals and then find a launch... Almost there..!
Rocksim shows the CG at 22.6 inches from the nose tip, Madcow states it should be 23.5 inches. To get the CG at 23.5 inches from the nose tip, it appears I need between .45 and .7 lbs, the heavier being for any H motors. Acme anvil, here I come..!
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Nytrunner
Pop lugs, not drugs
Is the 22" w/o motor?
And the .45 and .7 whats needed to get the CG to 23 with the motor?
And the .45 and .7 whats needed to get the CG to 23 with the motor?
o1d_dude
'I battle gravity'
Turned out really nice, Wally.
.7 with 29/240 H180 motor, give or take...
Thanks, hoping to get the nose painted tomorrow, decals will start going on later today, perhaps...
Exceptional work
Decals are on, slightly off center on the stripes on top of the tunnel, not enough for me to care. Nose cone re-sanded and ready for primer and paint.
Yes, that's a Qualman 29mm stand that arrived yesterday...
Wow, really outstanding.
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Well done!
G-Dog
RatDog Rocketry
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Wally,
Whats your file giving you as the CP ?? CG's of course will vary from one build to another, but we should both have the same(or very close) CP for the same kit. I always shoot for an accurate CP, then see where the CG ends up and make allowances for epoxy,paint,etc.. I have a CP of 30.6 with the stock components.
I was just going with the CP from rocksim as I only changed the ramjets, and don't think the shape is different enough to make much difference, so yes, it is listed as 30.8". Going to 23.5" for the CG will be overstable, but it gives me leeway to eventually use a 29-360 I motor/reload and still be ok. I don't have that hardware yet though...
Nose cone sprayed with primer, sanded, and sprayed again...
Glad you asked, G-Dog... I was feeling a little bad for not documenting how I added the nose weight. I drilled a hole in order to add the shot and epoxy. Through that hole, I uses an old launch rod and gouged the inside nose tip quite a bit, to provide something for the epoxy to grab. I mixed up an ounce of 30 minute epoxy and poured it all into the nose cone, keeping it upright with the nose inside a short piece of body tube. I then poured in the shot I had weighed by hanging a cup from the nose tip and added it until the Bomarc was balancing at 23.5 inches with the 29-240 H motor in the rear. That turned out to be .7 lbs, I removed an ounce of that to compensate for the epoxy. I still wonder if I'm too overstable, but I prefer that to not stable. I didn't want to drive screws through the nose, so I got some foam that I'll actually be adding in before I add the red color...
