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I saw a color photograph of that believed-to-be-cheating CRV7 tower shot on the cover of an issue of Aviation Week & Space Technology; I'm sure they chose it because it was so spectacular! The CRV7 is externally identical (with the possible exception of length; the CRV7 may be slightly longer) to the HYDRA-70 (MK66 rocket motor) FFAR (Folding-Fin Aerial [or Aircraft] Rocket), which has three conformal fins. Both rockets use the same unitary warheads and cargo warhead cases (which also fit the old MK4 and MK40 FFARs), but the CRV7 uses composite solid propellant, while the HYDRA-70 uses a less energetic double-base solid propellant. Also:
The retired CRV7s would make great air-launched Rockair sounding rockets (the original U.S. Navy Rockairs, flown during the IGY [International Geophysical Year, an 18-month "year" between mid-1957 and the end of 1958], used MK4 FFARs). The U.S. Air Force's version, spelled Rockaire, used a JATO rocket motor housed in a cylindrical, finned body with a nose cone; Rockaires were fired from F-86D Sabres. The CRV7/HYDRA-70 cargo warhead cases are ready-to-use instrument housings; their plastic nose cones are even RF-transparent, usable for transmitting and/or command-receiving payloads (I helped the Poker Flat Research Range get some HYDRA-70 rockets about twenty years ago), and existing (and/or payload user-made) boosted dart payloads could also be air-launched or ground-launched aboard surplus CRV7 rockets.
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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I pointed out how sounding rockets use--and always have used--surplus military missile and artillery rocket solid propellant (and [in earlier messages to the Canadian Armed Forces] occasionally liquid propellant; Re: the V-2, Bullpup-Cajun, Bullpup-Apache, etc.) rocket motors and airframe hardware whenever possible in order to minimize their costs, and I pointed out that air-launched CRV7 rockets could reach space, or come very close to it (such air-launched, instrumented FFARs--Folding-Fin Aerial Rockets, ancestors of the CRV7--were launched during the 18-month July 1957 - December 1958 IGY [International Geophysical Year]). If more people--especially Canadians--suggested this to him, perhaps he would rescind this waste of scientifically useful rocket hardware. Below are his contact information (his postal mail address, facsimile [fax] number, and e-mail address), and my messages to him: **************************************** TO: Prime Minister | Premier Ministre<PM@pm.gc.ca> and Harjit Sajjan<DND_MND@forces.gc.ca>; Dear Mr. Wentworth: On behalf of Prime Minister Justin Trudeau, I would like to acknowledge receipt of your correspondence. I regret the delay in replying. Thank you for sharing your concerns with the Prime Minister. You may be assured that your comments have been carefully reviewed. I have taken the liberty of forwarding your email to the Honorable Harjit Sajjan, Minister of National Defence, so that he may be made aware of your correspondence. Once again, thank you for writing. K. Bentsen Executive Correspondence Officer / Agente de correspondance Executive Correspondence Services / Services de la correspondance de la haute direction >>> From : blackshire@alaska.net Received : 17 Aug 2021 04:15:19 AM >>> >>> Subject : PM Web Site Comments - Innovation, Science and Economic Development >>>> Subject/Sujet : Innovation, Science and Economic Development Date : 2021/08/17 8:15:07 AM First Name/Prénom : James Last Name/Nom : Wentworth E-Mail/Adresse électronique : blackshire@alaska.net Address/Adresse : 330 3rd Ave., Apt 206 City/Ville : Fairbanks Province : Outside Canada Postal Code/Code postal : Y1A0A3 Telephone/Téléphone : (907) 457-3059 Comments/Commentaires : Hello Mr. Prime Minister (My apologies for having to 'fudge' the Postal Code, as I'm in Alaska, ZIP Code 99701-4851), I am a published spaceflight historian, and some years ago I was the volunteer historian for the Poker Flat Research Range, the sounding rocket launch facility located 48 kilometers north of Fairbanks, Alaska, where I live. I recently learned-from a Canadian member of "Ye Olde Rocket Forum" (a model rocketry and spaceflight history online forum of which I'm also a member)-that the Canadian Armed Forces are withdrawing from service (and destroying) the CRV7 unguided 70 mm diameter FFAR (Folding-Fin Aircraft [or Aerial] Rocket). Our quite similar--but somewhat shorter-range--withdrawn Mk 40 and HYDRA-70 FFARs have been, and are, used for scientific purposes, as inexpensive small sounding rockets and to calibrate the tracking radars at sounding rocket ranges. I am writing to you to make a request: Could you rescind the 'destroy' order for the CRV7 rockets, and make them available to qualified Canadian, U.S., and other nations' space agencies (and to universities that conduct upper atmosphere and space research with sounding rockets)? Destroying them is a colossal waste, a huge scientific and educational opportunity squandered (most sounding rockets, in fact, use military surplus rocket motors). Because the CRV7 (like all FFARs) can be launched from fighter jets, they can, and have, reached space (the U.S. Navy did this during the International Geophysical Year; the only reason why they weren't used much was because late 1950s electronics weren't nearly as miniaturized as today's). Many thanks in advance for your help. Sincerely Yours, James *Jason* Wentworth **************************************** https://pm.gc.ca/en/connect/contact Your message has been successfully submitted. Thank you for sharing your feedback with the Prime Minister. We greatly value the input of Canadians as our Government works to build a better Canada. Please note: Our service standard is to respond to English and French inquiries only. Main ContentBrowser not supported This website is not compatible with Internet Explorer or older version of Microsoft Edge(version 78 and older). For full functionality please use a supported browser. Contact the Prime MinisterThe Prime Minister greatly values the thoughts and suggestions of Canadians. You may write or fax his office at: Office of the Prime Minister 80 Wellington Street Ottawa, ON K1A 0A2 Fax: 613-941-6900 From: blackshire@alaska.net Sent: Tuesday, August 17, 2021 12:14 AM To: J. Jason Wentworth Subject: Prime Minister Trudeau msg. Hello Mr. Prime Minister (My apologies for having to "fudge" the Postal Code, as I'm in Alaska, ZIP Code 99701-4851), I am a published spaceflight historian, and some years ago I was the volunteer historian for the Poker Flat Research Range, the sounding rocket launch facility located 48 kilometers north of Fairbanks, Alaska, where I live. I recently learned—from a Canadian member of “Ye Olde Rocket Forum” (a model rocketry and spaceflight history online forum of which I’m also a member)—that the Canadian Armed Forces are withdrawing from service (and destroying) the CRV7 unguided 70 mm diameter FFAR (Folding-Fin Aircraft [or Aerial] Rocket). Our quite similar--but somewhat shorter-range--withdrawn Mk 40 and HYDRA-70 FFARs have been, and are, used for scientific purposes, as inexpensive small sounding rockets and to calibrate the tracking radars at sounding rocket ranges. I am writing to you to make a request: Could you rescind the "destroy" order for the CRV7 rockets, and make them available to qualified Canadian, U.S., and other nations' space agencies (and to universities that conduct upper atmosphere and space research with sounding rockets)? Destroying them is a colossal waste, a huge scientific and educational opportunity squandered (most sounding rockets, in fact, use military surplus rocket motors). Because the CRV7 (like all FFARs) can be launched from fighter jets, they can, and have, reached space (the U.S. Navy did this during the International Geophysical Year; the only reason why they weren't used much was because late 1950s electronics weren't nearly as miniaturized as today's). Many thanks in advance for your help. Sincerely Yours, James *Jason* Wentworth
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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Many thanks in advance for your help!
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#34
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Several different Payload Cylinder designs were used on the BLACK BRANT II, some with antennas, some without, different lengths, etc, etc, etc. To recreate the BBII Payload section ( as used in the prototype for the Estes kit, the FSI kit, and virtually every other BBII kit ) in BT-55 ( Scale 1 : 12.9871698113 ), the Lower Section w/o Antennas would be .5389934914" in length. The Antenna Section would have a length of 1.89109716411" . . . The TOTAL length of the Payload Section would be 2.43009065551". The photo and fin drawing below are for a 4-fin BB-IIA ( The fins are NOT the same as a 3-fin BB-II ) NOTE : The diameter of the BLACK BRANT II is 17.208". Sketch below ! Dave Last edited by Ez2cDave : 10-11-2021 at 08:11 PM. |
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Now THAT is a great idea; and likely much better than my secret wish that CTI (Cesaroni Technology Incorporated) would get wind of the destruction order and offer to buy the remaining stock out. Mind you, Ottawa could certainly use the extra money; after all, we just spent about $600 million on our rather useless federal election. But more to the point, consider just how many Newton seconds of total impulse a repurposed CRV7 motor might provide... and consequently, what certification level might one require to launch such a reduce/reuse/recycle marvel?! So, yeah, I heartily endorse your idea and thank you for taking the initiative!!!
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John Was CAR-ACF# S 337 Was NAR# 91049 Was SAM# 0323 Life begins when the countdown reaches zero! Last edited by Fuse Eh! : 10-09-2021 at 10:44 PM. Reason: clarity |
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