#1
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Rp-1
RP-1, as we all know is a highly refined kerosene. It is limited in sulfur, alkenes and aeromatics along with light hydrocarbons that evaporate easily. This gives it a high flash point, but it also likely affects another area. This leads to my big question. Without all those things that make hydrocarbon fuels smell good, what does the stuff smell like?
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I love sanding. |
#2
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It smells almost exactly like kerosene/ mineral spirits.
It does not reek like JP4/JetA.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC ! |
#3
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The closest everyday fuel to it--in terms of exhaust scent--is the kerosene that we used in our indoor (with no exhaust piping to the outside), two-burner Florence kerosene stove in Miami. My father bought it at a local, small-chain filling station, where we refilled our "goose-neck" kerosene can from a small, cubical, hand-pump-equipped above-ground kerosene storage tank. We could readily see the fuel, which was almost clear, with a slight straw-colored tinge. He also once accidentally fueled one of our (gasoline, obviously) push lawnmowers (from a smaller can into which he'd poured some kerosene for cleaning purposes some time before; he thought it contained gasoline, and didn't notice the different smell because of sinus congestion). But the lawnmower, to our amazement (when he realized his mistake afterward--either my mother or I noticed the different exhaust smell), ran just fine on the kerosene, so it must have been a pretty highly-refined grade of kerosene, closer to RP-1 than to #2 diesel or home heating oil.
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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 |
#4
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#2 diesel is for cars and trucks. Bunker diesel is heavier and for trains and ships. I was actually excited to see a tech post by GH!
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#5
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You can bait him to post with questions about chemicals. Thanks GH and Jason.
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I love sanding. |
#6
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But mixed with questions about odors we are at risk of provoking a scatological response.
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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#7
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RP-1 looks like cherry Kool-Aid (see: https://en.wikipedia.org/wiki/RP-1 )! My guess is that it is dyed that color, like aviation gasolines. That same article also says that an even lower-sulfur fuel, RP-2, was developed (it gives the impression that some RP-2 was refined), but that it never caught on in the aerospace industry because RP-1 was considered good enough, and: It also mentions--which I'd previously read elsewhere, some time ago--that the Soviets/Russians had used Syntin (I'd seen it spelled as "Sintin" before), a cyclopropane with propyl and methyl groups bonded to available molecular bonding points (just like how UDMH has two methyl groups bonded to one end of the hydrazine molecule, instead of hydrogen atoms). They're also planning to--if they haven't done it already--switch from using RG-1 kerosene (their "RP-1 equivalent," apparently) to using "naftil" (also transliterated as "naphthyl"--it sounds like a naptha-containing fuel) in the Soyuz-2 launch vehicle. (Maybe its exhaust will smell like mothballs--or at least burned mothballs? :-) )
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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 |
#8
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My Mazda RX-3SP (one year before RX-7) had a 1288cc 2 roter Wankel. It produced 90 hp normally aspirated and was so light, and had such a wide power band, I regularly wiped big block Barracudas and all nature of Corvettes and Porche's. I think a 45hp 600cc rotary for most existing sedans, SUV's and minitrucks would be just fine and would have substantial towing capacity despite the diminutive displacement. Much better mileage than the prior Mazda product. The faster you go the better mileage you get! What is the displacement on the UAV engines? Jerry https://assets.hemmings.com/story_i...000-0.jpg?rev=2 https://assets.hemmings.com/story_i...000-0.jpg?rev=2 |
#9
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I have no idea what those UAV Wankel's displacements are (all I know is that they're about the size of lawnmower engines, but flatter from front to back). My Jane's UAVs & drones book is packed away pretty "deeply," such that getting to it, and then getting it out, could take hours. :-(
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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 |
#10
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Having smelled many of the pure compounds that make up RP-1, and being an organic chemist that can identify many compounds by their just their odor (ask Wolf he was in my graduate lab that housed thousands of organic compounds), RP-1 should have a parrafinic (waxy) to a slightly ethereal odor much like that of pure lamp oil or other highly purified kerosene.
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Bruce S. Levison, NAR #69055 |
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