Me too! I have been flying my D region Tomahawk on F35's for years now, a new motor (especially in red) would be interesting.
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Me too! I have been flying my D region Tomahawk on F35's for years now, a new motor (especially in red) would be interesting.
dpower
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Ah, so the F67 is <= 30g of propellant, just like the EconoJet motors, that makes sense. So it'll have significantly less total impulse than the G74. I wonder if it uses a finocyl geometry to get such a fast burn, or a partially slotted circular core grain like the F44?
Could also be several short bates grains, or a large core in general. Hard to tell without an available thrust curve.
Thinking about flying 2 of these in my Loc Starburst at Bong some day, assuming Wildman gets them in stock in the next month or so.
*correction- these are 29mm motors
starburst takes 24.
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Could also be several short bates grains, or a large core in general. Hard to tell without an available thrust curve.
Thinking about flying 2 of these in my Loc Starburst at Bong some day, assuming Wildman gets them in stock in the next month or so.
*correction- these are 29mm motors
So... Stuff 'em in there. I got tape. :wink:
Spring thaw: my AT 29/240 casing arrived last weekend... and two pairs of the new F67 motors are on their way. Wheee!
rharshberger
Well-Known Member
Reload vs SU, no need for extra manufacturing steps and casings for the reloads.
F67's are single use actually.... and are economax vs econojet.... As a consummate cheapskate... either way there is nothing (quite frankly) "econo" about them!
LaserArts
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Any word on expected availability for 29mm and 54mm cases and hardware?
Yeah I paid $44.32 with shipping for the pack of 2 (economax, not sure if there's a difference from the -jet)F67's are single use actually.... and are economax vs econojet.... As a consummate cheapskate... either way there is nothing (quite frankly) "econo" about them!
Kinda pricy from buyrocketmotors
F67's
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$24 and change here:
https://www.siriusrocketry.biz/isho...s-hdw-36/economax-24-and-29mm-single-use-175/
Put my order in.
I'll assume Sirius didn't ship for free. Can I ask what the freight added ?
FWIW Sirius added $8.59 to my part of the world.
Same here in the middle of the Pacific!
That is an amazing bargain.
Difficult to do better than Sirius these days... Unless someone runs a special. However checking into it, and Sirius would charge me 9.79 (as of 22-Feb-2018), rather than 8.59. I would've saved 3 bucks over buyrocketmotor's price after the $5 discount coupon I used.
F67s came today... A day early. Now if only I could find the appropriate .eng or .rse file!
BDB
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Im looking for the same thing. Does anyone know where to find the ThrustCurve file, so I can run some sims?
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FB has the image curves which, if you can find, you can trace.
The packaging has a very nicely drawn thrust curve on the back... a quick photo and printout... a set of precision calipers ...
I admit that I had to do a bit of normalization to have Itot come out to 61 N-S (it wasn't that far off). It's not official but I think it's close!
F67W.eng zip file
View attachment F67W.zip
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Niiice.
swatkat
Down these mean skies, a kat must fly!
Any word on 24/40 reload cases yet? TARC season is rapidly closing...
Excellent question! I'd sure like to have my October 2017 backorder fulfilled!
If you absolutely need one, send me a PM.. I know I've got one rattling around in my range box.
It's not an absolute need... so yeah, I should not have thrown that bomb, since I've got a 29mm project currently (AT Astrobee-D that sat in its box for 20 years until now), an astron scrambler (original kit, 20 years old, had already cut the fins). I kind of feel bad for the vendors though who have to grit their teeth while the demand appears to be there. The hobby biz seems tough enough w/o the supply issues.
swatkat
Down these mean skies, a kat must fly!
Ditto. I've got some from Sept. and October waiting. I've got two cases now, but the extras would mean I could do four launches before launch and four afterwards. Double the amount of flights and data. Double the profits for Aerotech.
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