MaxQ
Tripoli 2747
I have a build thread going on over in "scratchbuilt" but given this is a question about the ideal Av Bay location for a large scale model, I'd like to get ideas/opinions from the guys that hang out here.
The question is based on the locations A thru D in the picture:
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I had several possible locations when I began, now I 'm thinking of considering more and would like some advice from you all.
Each location has some advantages, and some have distinct disadvantages, but we're still early in the design - so I think some accommodations can be made.
A. Service Module BT - This might be a good location for an Av. Bay - but I had planned on reserving this area for as much lead ballast/weight for CG adjustment as possible. This would also require very long wiring leads to reach the fin can for airstarts, and they would have to detach upon separation. Maybe..there could be a seperate electronic unit in the fin can just for outboard airstart motors. On the positive side, access to an Av Bay in the SM could be just like a traditional mid frame Av. Bay. - using a coupler and bulkheads.
B. Transition - For access I could have a shroud panel open just like on the real thing - but I've never heard anything good about vent holes on a surface area that was slanted.
C. Main Airframe - After spending so much time getting a nice CF tube, the last thing I want to do is start cutting a panel into it. Might affect the structural integrity. However, it is mid point in the overall airframe which is traditionally a reasonable place to put an Av Bay.
D. Tube Tank/Fin Can - This appears to offer the least viable opportunity for sticking an Av. Bay for DD function, given this component is pretty much nothing but a cluster of 3" dia. tubes around a central core tube (for a 54mm MMT). At least four of the outer eight tubes were planned for 29mm and 38 mm outboards. That leaves four empty tubes, but again, working from the back to the front for wiring for DD is problematic, particularly for a main deployment after seperation and droque deployment.
Likewise for anything in the fin can ring itself. Unless I put a dedicated electronic unit in the fin can ring just for airstarts on first motion.
The question is based on the locations A thru D in the picture:
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I had several possible locations when I began, now I 'm thinking of considering more and would like some advice from you all.
Each location has some advantages, and some have distinct disadvantages, but we're still early in the design - so I think some accommodations can be made.
A. Service Module BT - This might be a good location for an Av. Bay - but I had planned on reserving this area for as much lead ballast/weight for CG adjustment as possible. This would also require very long wiring leads to reach the fin can for airstarts, and they would have to detach upon separation. Maybe..there could be a seperate electronic unit in the fin can just for outboard airstart motors. On the positive side, access to an Av Bay in the SM could be just like a traditional mid frame Av. Bay. - using a coupler and bulkheads.
B. Transition - For access I could have a shroud panel open just like on the real thing - but I've never heard anything good about vent holes on a surface area that was slanted.
C. Main Airframe - After spending so much time getting a nice CF tube, the last thing I want to do is start cutting a panel into it. Might affect the structural integrity. However, it is mid point in the overall airframe which is traditionally a reasonable place to put an Av Bay.
D. Tube Tank/Fin Can - This appears to offer the least viable opportunity for sticking an Av. Bay for DD function, given this component is pretty much nothing but a cluster of 3" dia. tubes around a central core tube (for a 54mm MMT). At least four of the outer eight tubes were planned for 29mm and 38 mm outboards. That leaves four empty tubes, but again, working from the back to the front for wiring for DD is problematic, particularly for a main deployment after seperation and droque deployment.
Likewise for anything in the fin can ring itself. Unless I put a dedicated electronic unit in the fin can ring just for airstarts on first motion.