What are You working on?

Last Post

RSS

MikeS

(@mikes)

Prominent Member

I just ordered some 5.5" airframe. Looking at starting on something I have been looking at for a couple years.

An aprox. 5X upscale of an AGM-57X HEATSEEKER.

Should come in at 7.71'. I do have some issues with the lower fins. They will be the impact point

upon landing. Even a soft landing may be problematic. Was considering a two stage and let the

lower drop off. Too short, comes in at only about 3.78". Not long enough to put much of an engine

in. I will just need to build extra robust.

I always made a habit of angling the lower part of the fin, or having some airframe lower than the

fin. Not on this one.

I may change my mind before it starts. Still deciding

Anyway. Whats in the mix for you?

Quote

Topic starter Posted : 16/06/2015 11:05 pm

new2hpr

(@new2hpr)

Reputable Member

I'd keep it as is, and just go bigger than you'd normally go with the main chute. I've broken a fin on 3 of the last five rockets I've launched, so I need to learn more on this as well.

IF I can get back into it, I have on my bench:

1) Competitor 3 (original convolute-wound kit by PR)

2) Upscale of the Hot Pink Suppository of Discomfort: moving from 3" to 4" and from 3x 24mm to 3x 38mm. I'm thinking 3 Vmax motors would give the right kick.

3) LOC Legacy built up for H268R or I200

4) repairs to Excess in Moderation (broken fin), Ultimate (broken fin)

I guess I've got build time while the field dries out.

-Ken

ReplyQuote

Posted : 12/06/2015 11:23 am

edward

(@edward)

Member Admin

Right now I have a 3" minimum diameter hybrid that isn't names. Comes in at 35 pounds ready to fly and just under 120" tall. RASAero says 33,700'. Last time I few the M900 rocket the sim was within 2% of the actual altitude.

I'm starting to build another 5.5" Bunny Thumper rocket. Hoping to fly it on research 75mm motors.

Edward

ReplyQuote

Posted : 14/06/2015 8:12 am