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Has anyone found a source for 20mm inside diameter paper tubes for the Quest D5-0 motors? Thanks in advance!
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Heck, a motor mount doesn't even have to be pretty
True, but it does have to be pretty close to the right size.
Until we can all get hold of these motors, and use an old expended casing as a starting point, does anyone have good data (factory specs?) on the outside diameter of the new motor, or any tips on what to use as a mandrel to wrap cardstock around?
Hey Dick
I took some S-8 ? Tube the one that is smaller then BT-50 simply cut out a strip and glued it back together . Not major difficult.
Yes, but that's simply an equivalent version of Quest's T20 tube. The outside diameter of this tubing is 20mm (0.787"), whereas a motor mount for the D5 requires a tube with an inside diameter of 20mm (actually, just a smidgen larger). The inner diameter of the BMS tubing (0.748") is a bit too small for it.I think BMS has what we need, though it's a tight fit-dead on ID:
T20Q-34: .787x.748x.039x34 MPC/Quest T20
I've got a length of that from my last order (don't know what possessed me to order it)
I've got some Quest Ds on my order, so we'll see how that fits.
Cheers,
Jon
Has anyone found a source for 20mm inside diameter paper tubes for the Quest D5-0 motors? Thanks in advance!
Quest Aerospace sells both 20mm motor tubes and 20mm airframe tubes. And best yet, they are having a sale yesterday and tomorrow on all merchandise on their web site.
That's the outside diameter, Mark. I asked Nettie and she said those wouldn't work.![]()
I have a couple of D5-0s (That how they're marked) and the labels, which are white, light-weight paper wrapped around the brown, kraft-paper casings are not flat all around. There are wrinkles which could make a tight fitting motor mount problematic. If you look closely you can see a small gap between the label and the casing at the bottom of the motor.Carl
Maybe someone else can chime in to back up what I got.
I have one of the early release D5-P motors, it measures 0.785 with my dial calipers.
Jim
Well, that's odd. :shock:The propellent was mede in Germany; but the casing was made in China![]()
Unless you have a lathe or access to one im not sure what could be used as a mandrel OR there is some Aluminium or brass tube/rod which comes close to 20mm diameter depending on where you get it from.
They have plans to start selling them, I believe. The lack of a ready-made tube for the 20mm diameter motors is no big deal right now. It's easy enough to adapt exisiting tubes to take them or to roll your own motor tubes for them....Why doesn't Quest make a tube? Doesn't this seem bass-ackward?
Well, that's odd. :shock:
I thought that the new Quest motors were made entirely in China.
MarkII
QCR (https://www.cybertravelog.com/qcr/) make a 21mm tube and a thrust ring for it
I roll my own. After a great deal of experimenting with different papers, glues and wax mold releases... I found that plain old copier paper and Polycrylic works just fine. The mandrel is a 20mm glass tube from a science supplies house. A spray on mold release is used on the mandrel.
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