Kelti ------ This ones for You !

[Sarg Willy]

Dec-16-14



A compliment to your Excellant prop rendition,s



Sec-505 --
******* Wow found Unknown Pr-Hg -- *******
Pitch increment for climb --

We all know you loose torque at high speed ,
what this does is transfer more torque at
less prop speed ,, Strickly a climb Attribute ,
It makes for better reality , cause now
you can slow the prop speed -- from high = 100%
to roughly = 90% and pull
more climb ability , maintain better climb speed ,,
and climb faster , than you can at full throttle
high prop speed , simulates a change in prop pitch ,
What seems to work best is -18.0---to -22.0
whether it changes prop pitch , or tip,s the
aircraft balance = COG I don,t know , but it
work,s ,,
I,m guessing a change in prop pitch molly !!

Disclaimer ---!!
(( remember different planes have variable
engine to Prop -- Ratio,s ))
and of course not to be used on the
Watt,s Prop Hurricane !
Fixed pitch wood prop 2 blade

Max RPM climb drops speed faster ,
where as 90% RPM maintain,s better climb ,,

This does not change prop speed , You have to bring ,
the prop back manually , adjust trim pitch for climb
checking your mixture at altitude gain,s ,

During climb out

If you go to Max prop speed , the power and speed
of climb rate drop back ,,
Back to 90% RPM and
your climb speed goes back up ,,

Does this mean you have faster speed than 100 %
RPM ?
No ,, not if your properly trimed for level
flight , Max Rpm on my Spitfire climbed to 350 mph
and going back to 90% RPM droped back to 332 mph ,,
Seem,s to work quite well ,,

I,m not a pilot , but my old boss , a Dutch mechanic
was a private pilot , and I got to fly with him
a couple times , and he explained take off ,
prop pitch , and how variable props work ,,

Leiston Airfield -- Take off
-- test 1

-- Clock up
Timed roll out --
UN- TRIMED
Trim -Pitch = Stock setting
Full Throttle
Prop Pitch = 90%
Flaps = half runway
Lift off secondary cross runway 120 Mph -
Wheels up + flap up
Climb out stick control --
Adjust mixture for climb
4 minutes duration + paused

Altitude = 4,256 ft --

Test 2

-- Clock up
Timed roll out -- (+5.0 Sec,s Cheat)
UN- TRIMED
Trim -Pitch = Stock setting
Full Throttle
Prop Pitch = 100%
Flaps = half runway
Lift off secondary cross runway 110 Mph -
Wheels up + flap up
Climb out stick control --
Adjust mix for climb
4 minutes duration + paused

Altitude = 3,921 ft --

Basically a test to see if the changes effect take off
roll-out , and to see if a canned routeen was used
by M$s for take off --

Disclaimer --
All testing done at 75-% Sim Rate !!
which allows, me to moniture test results
easier !!


A couple of lines to post to air Edd Inni file ------

Optional of course !!

Sec505
11=40,double,*Prop Pitch Torque at 90% RPM
11h=Usually 1.0 if Turbo/old/ 90% P-Pitch = (-18.0/-22.0)

Or dissregard and stay with a constant speed prop !
At your option of choice Sir ,

[Blood_Hawk23]

already added to AirEd. Thank You Sarg.

[Sarg Willy]

Your welcome Blood Hawk , got some time to test the Hurricane , for climb rate , and clocked in 8 minutes flat , airfield to 20,000 ft ,, which I thought was a tad on the hot side ,, checking stat,s called for 8.2 minutes , but that may be running from sea level ,, Still rather surprized me as the Hurry was 800 lbs heavier , smaller engine , less boost, and less Man pressure , and higher engine to prop ratio ,,

[Blood_Hawk23]

I think the wing has alot to do with it. Wasn't the Hurricane's wing a better lifting wing then the Spitfire. I thought I had read that some where.

[hewman100]

The thickness of the Hurricane wing gave it better performance at lower altitudes.

[Sarg Willy]

Got some time to run , comparrison tests , against a Spit II A , -
Major changes their -- 13.5 minutes to 20,000 ,, took a while to sort that out , -- But well worth the effort , 8"+30 secs
Gave more insite on climb factors , Now I have a better grasp on how the sim handel,s vertical motion , and that means I can operate on the rest of em ,
Blood Hawk , a couple of points I,ve found , make me think , the Hurricane wasn,t as bad as people portray it ,
Peter Townsends book , In that the Spitfires were alway,s late to rondiview altitude , having left from the same airfield ,
And he marvel,s at the lone Spitfire , that manages to climb with them ,
It,s what he doesn,t say , that leaves question,s , Was he using a Hurricane -IIA and were the Spitfires Claped out IA,s -- and was the
lone wolf Spitfire a New replacement -- IIA

British Documentary , Brit pilot describing the BOB memorial
Spitfire vrs the Hurricane , The Hurricane does have an edge
on the Spitfire ,s Turn Radius ,,

[Sarg Willy]

Still toying with effects , and I,m going to amend the Inni file ,
Sec505
11=40,double,*Prop Pitch Torque at 90% RPM
11h=Usually 1.0 if Turbo/old/ 90% P-Pitch = (-10.xxxx)

seems to reflect the percentage of Prop speed drop ,
for climb ,,

Altering section
508
unit 4 --- RPM -Torque is the candy store -- if you want to tailor
climb to known spec,s ---

The Cfs-1 throttle props , a little easier to tag the 10 % drop
on vertical scale , vrs the Cfs-2 push me pull knob ,,
3 to 4 key board click,s should get you 10 % drop in
Prop speed ,

[hewman100]

Hurricane IIAs and Spitfire IIAs didn't start to reach front-line service until the end of the Battle, late September/early October.
85 Sqn, because of losses in France, was mostly equipped with MkIs fitted with Rotol props and Merlin IIIs throughout though.

[kelticheart]

Thanks, Sarg!

Duly printed out and placed in my "CFS2 secrets" book!

Merry Christmas to you and your family!

Cheers!
KH

[Sarg Willy]

Kelti , I hope your as stuffed as I am ,
Pursueing the Zero , A6M2 , twas a real nut cracker , to fix ,


Hewman , thank,s for the infoe and your opinoin on Hurricane ,

since the Spit 1A had fabric aileron,s till the Mk V entered production , Bader in 612 had his mark IIA fabric aileron,s changed at factory to
metal Mk V ailerons , and raved about the handeling differences , then had the sqd flown in piecemeal to factory for upgrade , s
Were not the Hurricanes Fabric too , You,d think that such an improvement as metal Aileron,s , would have been , added to the Hurricane line as well , I,ve never came across a mention of it though ,,

[Sarg Willy]

Had a crack at the B-24 Libby , to see what prop pitch can do ,
The last time I flew from Leiston , I had to slew back to base perimeter, to try and get lift off , heavey bomb load ,
Not any more , runway start point , to end of runway ,
lift off speed 100 Mph , and a steady climb out at 145 mph ,
Just as effective on Multi props ,,

[blohmundvoss]

Hi Sarg

Just a sanity check -

What you're describing above is an edit/addition to the configuration settings file for AirEd, right?

(And great discovery by the way - should have said that first!)

Cheers
BuV

[Sarg Willy]

yes Buv the second one

Sec505
11=40,double,*Prop Pitch Torque at 90% RPM
11h=Usually 1.0 if Turbo/old/ 90% P-Pitch = (-10.xxxx)

So far Iv,e nailed about seven different planes with this , and got excellant results,
Two hard cases from CFS-2 turned up Zero A6M2 , and the Wild cat so far ,, The Zero I finally fixed , working on the Cat now ,,