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Max climb angle

 
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Rob Seaton



Joined: 02 May 2012
Posts: 2
PostPosted: Thu May 03, 2012 7:18 am    Post subject: Max climb angle Reply with quote
Does anyone know the max climb angle for a 914 powered trigear? I have to do a fuel flow test with min fuel & the aircraft suspended in max climb. I don't see this listed in the Operators Manual.
I think it would be slightly different for each aircraft so an average would be OK?
Rob

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kheindl(at)msn.com
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PostPosted: Thu May 03, 2012 7:58 am    Post subject: Max climb angle Reply with quote
I will put a query out on the Europa forum.


Quote:
Subject: Max climb angle
From: robertseaton(at)me.com
Date: Thu, 3 May 2012 08:18:33 -0700
To: europa-list(at)matronics.com

--> Europa-List message posted by: "Rob Seaton" <robertseaton(at)me.com>

Does anyone know the max climb angle for a 914 powered trigear? I have to do a fuel flow test with min fuel & the aircraft suspended in max climb. I don't see this listed in the Operators Manual.
I think it would be slightly different for each aircraft so an average would be OK?
Rob




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rlindsa2(at)san.rr.com
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PostPosted: Thu May 03, 2012 9:33 pm    Post subject: Max climb angle Reply with quote
Rob, my Owners Manual for the XS Monogear powered by the 914 states 61 kts
for best angle of climb.
Bob Lindsay Gillespie Field San Diego

---

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budyerly(at)msn.com
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PostPosted: Sat May 05, 2012 7:32 am    Post subject: Max climb angle Reply with quote
<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Sent earlier: Rob,
Hope things are moving along.
Max angle of climb is the L/D max airspeed. The glide speed is normally L/D max however, the XS manual is 61Kts. Check your operators hand book Chapter 5, VX is 61 and is flight tests proven, flaps up of course. In my tests I prefer 65 Knots on the heavier aircraft for a bit of a margin.
Should power be lost at this climb angle, an immediate (more than aggressive) push over will be needed to keep sufficient flying speed to prevent a stall. This will leave you in a push over from nearly 20 degrees nose up to 15 degrees nose down and find you at a speed of 55 or so. Insufficient to make an immediate flare without a hard landing if power is lost below 100 feet. Practice is required.

I do this on all my test flights once the engine is proven and I can safely practice this Vx climb at altitude with the prop at 5750 and full power on the engine. I climb for about 1 minute or about 1500 feet of altitude at this power setting and angle and check for temps and of course fuel starvation, oil pressure stability and the like. Then I do it again from takeoff. In 3000 feet you will easily go through pattern altitude so coordinate with tower.

Regards,
Bud


[quote] ---

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klinefelter.kevin(at)gmai
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PostPosted: Sat May 05, 2012 9:17 am    Post subject: Max climb angle Reply with quote
Bud and Bob,
I think Rob wants the fuselage deck angle at VX full power.
Bud mentions "nearly 20 degrees". He needs to suspend the tri gear fuse on the ground with minimum fuel
(not sure what that would be) and do a fuel flow check.
Is that correct Rob?
Kevin
XS Mono, 914 & Airmaster

On May 5, 2012, at 8:32 AM, "Bud Yerly" <budyerly(at)msn.com (budyerly(at)msn.com)> wrote:

[quote] .hmmessage P { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } BODY.hmmessage { FONT-FAMILY: Tahoma; FONT-SIZE: 10pt } <?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Sent earlier: Rob,
Hope things are moving along.
Max angle of climb is the L/D max airspeed. The glide speed is normally L/D max however, the XS manual is 61Kts. Check your operators hand book Chapter 5, VX is 61 and is flight tests proven, flaps up of course. In my tests I prefer 65 Knots on the heavier aircraft for a bit of a margin.
Should power be lost at this climb angle, an immediate (more than aggressive) push over will be needed to keep sufficient flying speed to prevent a stall. This will leave you in a push over from nearly 20 degrees nose up to 15 degrees nose down and find you at a speed of 55 or so. Insufficient to make an immediate flare without a hard landing if power is lost below 100 feet. Practice is required.

I do this on all my test flights once the engine is proven and I can safely practice this Vx climb at altitude with the prop at 5750 and full power on the engine. I climb for about 1 minute or about 1500 feet of altitude at this power setting and angle and check for temps and of course fuel starvation, oil pressure stability and the like. Then I do it again from takeoff. In 3000 feet you will easily go through pattern altitude so coordinate with tower.

Regards,
Bud


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Rob Seaton



Joined: 02 May 2012
Posts: 2
PostPosted: Sun May 06, 2012 10:52 am    Post subject: Re: Max climb angle Reply with quote
Yes, I need to hang it from the rafters at the max climb angle.
Rob

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rampil



Joined: 04 May 2007
Posts: 870
PostPosted: Sun May 06, 2012 11:02 am    Post subject: Re: Max climb angle Reply with quote
Roughly 20° sounds about right (it is pretty steep!).
If you tie your tail hook to the floor to simulate 20° angle
you should be fine for the fuel free flow test.

BTW Vx and Vy change with weight, and Vx of 61 is only applicable
to the factory flight test article at max gross wt. If you know your
Vx at max gross then you can rule of thumb that it decreases about
1 kt for each 100 lbs below gross. Personally, I never had 224XS up
to gross wt until after my initial 40 hr flight test period. Of course the
test goes on, the test goes on (I think I hear Cher in here)

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rampil



Joined: 04 May 2007
Posts: 870
PostPosted: Mon May 07, 2012 5:06 am    Post subject: Re: Max climb angle Reply with quote
OK,
A little flight test data:
Last evening in a 912s with 2 pax and half fuel, the Vx deck angle
was 14 degrees per my BMA EFIS2. Twenty should be a good test angle

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