I would like OR files for Estes Expedition and V2. I have them in RS but doesn’t fully import into OR especially when attaching fins to an end transition. Mahalo.
Where do you find this upscale kit? Thanks
I would like OR files for Estes Expedition and V2. I have them in RS but doesn’t fully import into OR especially when attaching fins to an end transition. Mahalo.
I imported the V2 RS file but OR removed the parts it didn’t like. I made a facsimile but not sure if the flight dynamics are accurate. Has anyone made an accurate ork file? I’ll try to upload the version I made.For the V2, you need to create a phantom body tube in RS, then import it into OR and play with it.
For the Expedition? Thanks for the laugh! I needed that! You're looking at A MINIMUM of 300 internal body tubes PER INCH of the length of the taper. Good LUCK!!! (Don't even dream about doing the graphics, or getting valid flight info).
I imported the V2 RS file but OR removed the parts it didn’t like. I made a facsimile but not sure if the flight dynamics are accurate. Has anyone made an accurate ork file? I’ll try to upload the version I made.
So what you’re saying is that I need to integrate the derivative for the taper? The Expedition seemed to fly similar to the Honest John.
Today's additions are a new one from Vander-Burn Rocketry, the Cherokee-H, and a mod to make it an upscale of the Cherokee-D (1247)
The Cherokee-H is based on the Cherokee-E at a 3" diameter. It's really a nice kit. The measurements in this sim were taken from an actual sample that was provided to me. You'll also likely recognize some of the renders on the instructions from this thread (way back on the first page). Kit includes: laser cut fins and centering rings, an included baffle, slotted body tube, decals from Stickershock, 29mm motor retainer, 30" chute, 500 lb Kevlar shock cord, the required hardware for connecting up the recovery gear, and your choice of rail buttons or launch lugs (or both). Basically, except for finishing supplies, and glues, it's a pretty complete package. Rather than going with the black, blue, and white color scheme, Toby opted to go with black, red, and white to reflect the Cherokee-D's markings.
The sim has the marking's placements based on the Cherokee-E. So, don't blame me for the CP and CG markings being reversed... That's how they appeared on the "E's" instructions. For flight performance data, you'll need to delete the PBT with the "Air Fins". As the current version of OR doesn't support rail buttons, I opted to go with the launch lugs in "stock" locations.
Now for the mod to upscale it to a 3" version of the Cherokee-D (1247)
Now there's a couple of ways of upscaling, you can upscale by length or by diameter. I chose to sim the latter. The instructions state that you should remove 10" from the body tubes. For an upscale based on the diameter, I'd recommend trimming the longer (34") tube down to 30 ²⁵⁄₃₂" long, and the shorter (21.5") tube down to 10 ¹³⁄₆₄. This gives a correct length for an upscaled 18" long BT-55, and allows the bottom of the larger wrap to conceal the joint. The nosecone is not a perfect match to an upscaled PNC-55AC, but for this kit it's a good choice at 10.937" long. Those who want to make or commission an upscaled nosecone will need it to be 12.52" long. The fins are not an exact match to the Cherokee-D (as they were based on the slightly smaller Cherokee-E's fins), but again you get the right feeling with the supplied fins. The forward launch lug was placed just behind the joint in the body tubes, where I'd recommend splitting the rocket for a zipperless recovery system. Decal placement was based on the Cherokee-D (1247)'s markings.
In the near future, I'll be simming an upscale of the shorter K-47 version of the Cherokee-D. But for now, I can tell you that the combined length of the body tubes should be 37 ⁷⁄₃₂".
Thanks to Toby Vanderbeek!
Bought the kit From Toby. Very excited to get back in the hobby.Where do you find this upscale kit? Thanks
Hi Alan,Balsa Machining 3" diameter School Rocket. 29mm.
New addition to the list, recently purchased. I bought the long airframe and want to mod it a bit, so I created 17" and 34" versions to start with.
This is NC, BT, MMT and fins only.
View attachment 436323
Aye, Cap'nHowever, please don't post sims here. We can do that elsewhere. Ok?
Thanks!Aye, Cap'n
Sorry... didn't see this message... No, I've been on a hold for sims for some time... but the dam is breaking.Hey K'Tesh, speaking of sims, did you ever complete the D.O.M. design I pm'd you about? I'm itching to see your final take on it!
I used an externalized internal body tube. However, a CR would effectively do the same.Hi K'Tesh,
I answered my own question, I think. Just use a centering ring with the appropriate inner and outer diameters and length.
Stanley
I see. OK.Neither will do... Problem with these, which should be resolved in the next version of OR, is that they are internal components. While they add weight, they are excluded from the aerodynamic calculations.
I am not sure how accurately they sim in OR but I have used couplers to represent Ring Fins.Neither will do... Problem with these, which should be resolved in the next version of OR, is that they are internal components. While they add weight, they are excluded from the aerodynamic calculations.
In future versions of OR, we should get ring fin support.
They do not sim at all.I am not sure how accurately they sim in OR but I have used couplers to represent Ring Fins.
Like neil_w said... They won't sim at all. BI am not sure how accurately they sim in OR but I have used couplers to represent Ring Fins.
If I remember right, integrate the derivative, is like squaring the square root type of statement.It’s a calculus joke but not a very good one.
I appreciate the info. I wondered if there was some trick to emulating unique rocket designs in OR.
Regrettably the forthcoming release still does not support ring fins. ;(We need to wait for the next release of OR for ring fin support.
But you'll be able to sim it using pods, which will give you the body tube and its placement. I guess it'll not give accurate drag performance though.Regrettably the forthcoming release still does not support ring fins. ;(
Regrettably the forthcoming release still does not support ring fins. ;(
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