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HelicopterHIROBOOther › Flight Time With The 91's
09-02-2003 03:20 PM  14 years agoPost 1
davehour

rrElite Veteran

Guayama, Puerto Rico 00785

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Gentlemen:

Please, post your actual flight time with your Freya 91. Don't forget to include fuel, engine and headspeed if available.

I'm getting around 8 1/2 minutes using Coolpower 30%, MP2 and OS91 C-spec. Headspeed around 1700.

Thank you very much.

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09-02-2003 04:29 PM  14 years agoPost 2
Vertical Limit

rrApprentice

Pennsylvania

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10 Min.

Byrons 30%, OS 91C-Spec Hatori Pipe 1850 RPM

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09-02-2003 05:43 PM  14 years agoPost 3
traderdave2

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Covington, GA

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10min 30 second with 1/2 header tank left with coolpower/magnum 30% 91 c-spec with cline pump and mp 2 1800-1850 headspeed

Harlan

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09-02-2003 05:44 PM  14 years agoPost 4
irq

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San Diego, CA

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davehour, I'm getting about 10 minutes with a C-spec using 7.92:1 gear ratio with a 1900 headspeed. What gear ratio are you using? If it is also 7.92:1, keep in mind that the C-spec generates its best power around 15,000 RPMS which turns into 1900RPM headspeed at the 7.92:1 gear ratio.

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09-02-2003 07:52 PM  14 years agoPost 5
davehour

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Guayama, Puerto Rico 00785

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Yes, the ratio I'm using is 7.92.

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09-02-2003 07:55 PM  14 years agoPost 6
irq

rrKey Veteran

San Diego, CA

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Running only 1700 @ 7.92 and getting 8.5 minutes, I'd say you're running a little rich. Look for fuel line leaks, too.

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09-02-2003 08:15 PM  14 years agoPost 7
mcap232

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Low Cal (San Diego)

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Ys91 at 8:45; 1750 at the head; with sb16 gives about 9 to header tank. That is with 4 or 5 autos thrown in as well. I would guess that with out autos would in the 8.5 to low 8 minute range (motor still newish.) Once the needles come in I would thins a fair 9.5 to 10 minutes would be a good guess.

Matt Wheeler

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09-02-2003 10:02 PM  14 years agoPost 8
richardf

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San Diego, CA USA

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Time

Freya, 3D OS-91 7.92 G/R 1750 RPM, Performance Plus 15%, SB-16 TB muffler, OS-#8 10 minutes.

Freya EX FAI, OS-91 with WC porting 7.92 G/R 1500 RPM, Performance Plus 15%, KSJ 60-90 muffler, OS-#8 and 12 minutes.

Sceadu, YS-63 four stroke, Performance Plus 15%, Performance Specialties muffler, OS-F plug and around 35 minutes per tank. (couldn't resist)

Richard.

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09-02-2003 11:03 PM  14 years agoPost 9
inventory

rrApprentice

CA

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About 8 minutes of actual flying around (10 hovering, aka "boring break in" minutes) on a C-spec @ 7.92,mp1, uniflow tank setup, 2 oz. header, cp 15%. Good power, but not quite what I was expecting from a 90 when I made the move.

The engine still has a little leaning out left in it, but I just got the 8.45 gearing and a ys91and sb16 is in the works, so it may not ever get there.

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HelicopterHIROBOOther › Flight Time With The 91's
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