Now we are to the point in this build where I start to really ask some questions. The first group of these relates to vent holes. Yes, I have done a search and there are definately opinions, lots of them, many somewhere between divergent and outright opposing.
I found the altimeter bay vent hole recomendation page, since this is a 5.5" internal length, 2.9" diameter bay three 1/8" holes appear to be plenty good. I will likely make at least one bigger so I can actual arm the altimeter (I will probably use the rotary switch many here like). So this raises a question.
1) Should I make all the holes the same size, or just the one to arm the altimeter through?
Next, vent holes in both airframe compartments. I think this rocket will spend its life (a long one I hope) topping out between 2k and 4k, so with a 3" ID that is some actual pressure I want to account for. Keeping this in mind I don't want to use shear pins in the lower section and I really don't want to make that connection real tight either. So assuming I am set on vent hole(s) the below questions arrise.
2) What size should the vent hole be assuming I only want one in each section?
3) where in each section should they be located? I assume near the joint you don't want to seperate, but I don't want to be wrong here.
Thanks in advance for the advice.
-Chris
I found the altimeter bay vent hole recomendation page, since this is a 5.5" internal length, 2.9" diameter bay three 1/8" holes appear to be plenty good. I will likely make at least one bigger so I can actual arm the altimeter (I will probably use the rotary switch many here like). So this raises a question.
1) Should I make all the holes the same size, or just the one to arm the altimeter through?
Next, vent holes in both airframe compartments. I think this rocket will spend its life (a long one I hope) topping out between 2k and 4k, so with a 3" ID that is some actual pressure I want to account for. Keeping this in mind I don't want to use shear pins in the lower section and I really don't want to make that connection real tight either. So assuming I am set on vent hole(s) the below questions arrise.
2) What size should the vent hole be assuming I only want one in each section?
3) where in each section should they be located? I assume near the joint you don't want to seperate, but I don't want to be wrong here.
Thanks in advance for the advice.
-Chris