banker
New Member
Posts: 14
Home Airport: KSRQ
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Post by banker on May 22, 2020 14:44:46 GMT
Hi
I am a relatively new P2008T owner. Just wondering what sort of cruise speed other owners are getting out of their planes. At 5400 rpm all I am able to get is on average about 103 knots (5500 ft). I have a Sensenich 3 blade prop, which is set to pitch pin #4. I realize there are a number of variables, but just looking at averages.
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Post by grantopperman on May 22, 2020 14:56:58 GMT
Something's up with that. Seems very slow. I have a P2008 turbo (914) and get 120kts + in cruise at just under 5500 rpm (pitch 5). So much depends on conditions, but I'm rarely under 118 or so and sometimes nearly 125.
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Post by Cluemeister on May 22, 2020 15:42:30 GMT
That's definitely low. I would get that prop adjusted for more cruise.
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Post by Ed Midgley on May 22, 2020 22:43:11 GMT
So we’re on the same base are you talking indicated or true airspeed.
Ed
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Post by ChiMike on May 23, 2020 18:38:54 GMT
KTAS on my plane—setting 5, is 123-128 KTAS at 5400-5500 rpms.
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ergo1
Junior Member
Posts: 51
Home Airport: KDXR
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Post by ergo1 on May 21, 2021 11:41:59 GMT
Hi
I have the 914 Rotax. I have the pitch set at 4 and am not seeing the cruise speeds you and some others are seeing. What will I be giving up in other areas of performance if I change
the prop pitch to 5 - climb, takeoff roll, ect.?
What indicated (KIAS) airspeed are 914 owners seeing at what altitudes and outside temps?
Thanks
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Post by ChiMike on May 21, 2021 12:07:31 GMT
If you are not overloading your aircraft, you should not notice any real change on taking off and climb out. Nor should you notice any change in control ability for speed on your final approach and landing. I am routinely in the 124 to 128 KTAS at cruise. I have my prop set at 5.
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ergo1
Junior Member
Posts: 51
Home Airport: KDXR
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Post by ergo1 on May 22, 2021 3:09:20 GMT
I’m going to try setting my prop pitch at 5. Let’s see if that increases my cruise speed.
BTW, What’s your altitude and indicated airspeed? Outside temp?
Thank you
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Post by ChiMike on May 24, 2021 4:09:24 GMT
My altitude can vary, temp can vary, density altitude can vary. On those extremes at 7,500 feet I can range from 121 to 128. Also the load in the plane and how much the plane is compensating for wind drift and slip at cruise can also shave off a knot or three.
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Post by FormerCirrus on May 25, 2021 1:58:37 GMT
At 5500 feet, in my P2008 914, in straight and level flight ...
35 inches
136 ktas
32 inches
128 ktas
29 inches
120 ktas
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Post by ChiMike on May 26, 2021 2:05:45 GMT
What is your prop setting?
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ergo1
Junior Member
Posts: 51
Home Airport: KDXR
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Post by ergo1 on May 26, 2021 20:59:28 GMT
At 5500 feet, in my P2008 914, in straight and level flight ... 35 inches 136 ktas 32 inches 128 ktas 29 inches 120 ktas Wow - You are closing in on SR20 territory!! I'm really impressed. At 35" are you safe from over boosting the turbo beyond the 5 minute limit? Do you have any idea what your indicated airspeeds are at the various manifold pressures? Outside temps? Thank you! BTW, I'm also an ex-SR20/22 driver. LSA seems to be an interesting way for me to embrace flying once again. I'm looking forward to the journey. |
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Post by Ed Midgley on May 27, 2021 0:29:20 GMT
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Post by ChiMike on May 27, 2021 0:46:22 GMT
What prop setting. What o2 system?
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Post by Ed Midgley on May 27, 2021 0:53:11 GMT
I have an Airmaster prop with 72” Whirlwind blades.
Sky Ox 15 cu ft O2 tank. When I fly to the west coast I take two bottles.
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