The knock-limited performance of several miscellaneous fuels blended with a base fuel Page: 2 of 10
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I 3 1176 01364 1777
NAOAcAa ho. i30aos
. NA .... L ADVISOR _ FOR o AQONAICS .
ADVANCE COMFIDEETIAL REPORT
THE NDCK-LIMTED PE M E 0f SEVERAL MISCLWAflO
FUEar w.~aNn WIM A BASE F E.-
By DonalA 3. Bellman
Investigations were oonducted to determine the knook-limited
performance of blends of 90 percent by volume AN-F-28, Amendment-2,
fuel anr 10 peroent by volume of each of the following fuels:
tert-amnl alcohol, 2,6-dimethyl-1,4-dazane, methyl tert-butyl
ether, methyl tert-butyl ketone, methyl isobutyl ketone, mesityl
oxide, acetone, and disopropyl ketone. The investigations were
conducted in a supercharged CFR engine wth an inlet-air tempera-
ture of 2500 F, an engine speed of 2500 rn, a compression ratio
of 7.0, and a spark advance of 300 B.T.C.
The data indicated that only the addition of methyl tert-butyl
- ether or methyl tert-butyl ketone to AN-F-28 fuel resulted in a
significant lnorease in- the knoek-limited power. Methyl tert-butyl
ether gave a greater increase than did methyl tert-butyl ketone.
The tests presented in this report, which are of a preliminary
nature, were run on several exploratory fuels, many of which were
available only in small qualities. Tbo fuel blend oontaining
methyl tert-butyl ketone was prepared by the Fuel Synthesis Seotion
of this laboratory; the rest were om racially obtained.. Several
of these fuels have been tested by other laboratories. (See refer-
ence 1, pp. 239, 240, and 265.)
Each fuel was tested as a 10 percent by volume blend with
AN-F-R8, Amezxmen-2, fuel. The knook-limited performance of the
blend was then compared with the knook-limited performance of
AN-7-8 fuel. Data oovering the entire range of fuel-air ratios
were obtained on less than a quart of exploratory fuel.
II i l ll IEE 11 1111
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Bellman, Donald R. The knock-limited performance of several miscellaneous fuels blended with a base fuel, report, July 1944; (digital.library.unt.edu/ark:/67531/metadc62432/m1/2/: accessed January 16, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.