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plans for my estes sale parts. Renegade, Sentinel.

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walterb

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Two of my favorites are about to be recreated. One of my Vagabounds is about to become a Sentinel. I loved that rocket so much I upscaled to a BT 80 and down scaled to a BT50. I was going to though the wall it (fin breakage was a problem with the original) with the STM 12 tubes, but the fin count is different, So one of those tubes is going to become a Renegade.
I got the fin patterns from jimmy z site. Looks like the Sentinel is right size and the Renegade has a ruler next to it. I will have to calculate and add for the tabs.
on a related note, my friend Brian bought the Red Max the same day I got the Renegade back in 80's and noticed the max tube was the same length as the Renegade bottom tube and the fins are very similar. I know the noses are different but will use the slightly longer Sentinel nose for the Renegade.
 

rharshberger

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Two of my favorites are about to be recreated. One of my Vagabounds is about to become a Sentinel. I loved that rocket so much I upscaled to a BT 80 and down scaled to a BT50. I was going to though the wall it (fin breakage was a problem with the original) with the STM 12 tubes, but the fin count is different, So one of those tubes is going to become a Renegade.
I got the fin patterns from jimmy z site. Looks like the Sentinel is right size and the Renegade has a ruler next to it. I will have to calculate and add for the tabs.
on a related note, my friend Brian bought the Red Max the same day I got the Renegade back in 80's and noticed the max tube was the same length as the Renegade bottom tube and the fins are very similar. I know the noses are different but will use the slightly longer Sentinel nose for the Renegade.
If you need fin dimensions for the Sentinel let me know as I have my original and can get pretty good measurements from the fins (its a built model).
 

walterb

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the jimmyz scan has them at 3 1/2 for the leading edge of the rear fins. My memory thinks they are bigger.
 

rharshberger

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the jimmyz scan has them at 3 1/2 for the leading edge of the rear fins. My memory thinks they are bigger.
I will check them tomorrow when I get home, but that number is about right as the Sentinel is a good sized rocket. I would do it this evening but I am working a 18 hour shift.
 

rharshberger

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the jimmyz scan has them at 3 1/2 for the leading edge of the rear fins. My memory thinks they are bigger.
Your memory serves you well, the LE is actually 4.0" and the TE is 3.5", I didn't take a tip or root measurement.
 

walterb

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I can do the math. Don't ask me to do quadratic equations but but I can scale fins. I saw practical uses for geometry and trig so I remembered them.
 

rharshberger

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I can do the math. Don't ask me to do quadratic equations but but I can scale fins. I saw practical uses for geometry and trig so I remembered them.
I figured that you could scale the fins just fine. ☺
I usually make a plywood pattern of each type of fin in a kit, regretfully the strake type fin pattern for the Sentenel I can't find currently.
 
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