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gp viper w/ 60lx -sj50

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Old 05-26-2009, 11:51 PM
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russm
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Default gp viper w/ 60lx -sj50

hey bob, in your opinion what kind of speeds should i expect out of these setups. 15%synth fuel and apc 9-7 props. the weather out here in az is around 97 degrees.thanks, russ
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Old 05-28-2009, 11:50 PM
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Default RE: gp viper w/ 60lx -sj50

hey bob, are you still around?
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Old 05-29-2009, 01:33 PM
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Default RE: gp viper w/ 60lx -sj50

hi russ........

yeah... still lurking about

SJ-50, regular 9x7, Viper ...... figure around 135-140 range. With the 60LX,maybe another 5 on top of that.

Perhaps slightly more with a 8.8x8.5 prop or 8.5x7.5 on the 60LX.

Bob
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Old 05-29-2009, 02:08 PM
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Default RE: gp viper w/ 60lx -sj50

thanks bob, w/ the 60lx-gps-133mph.-9-6 apc prop.   w/sj50-gps-115mph-9-8 prop. ihe 60 is new. looking for much better #s than i have gotten so far. goi beat by a sd formula w/ a souped up 160fx.(148)
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Old 05-29-2009, 02:25 PM
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Default RE: gp viper w/ 60lx -sj50

eewwwww

SJ50 should have you well up over 120. TT40 (stock)can get a viper up to 115

Try the 9x6 on the SJ-50 ....... get the rpm up a bunch.

Bob
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Old 05-29-2009, 03:39 PM
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Default RE: gp viper w/ 60lx -sj50

geting 18000 on the 50, backing off 500 to fly. geting 20300 on the 60 and backing off 400 to fly. all props are apc. using 15%synth fuel. the temps are around 98 degrees.
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Old 05-30-2009, 06:49 PM
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engines are on the money.......

you may want to try the D-1 props .... the 8.8x8.5 is a great place to start

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