REFLECTOR:Engine Progress

Sat, 10 May 2003 23:17:46 -0700

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Yesterday was the second flight of N211JP.  All looks very good.
If we had 10 Doug Doers, Dean Bergmans and Dave Driscolls we would be well 
under way to the 400 hp V8.  They are gleaning so much more out of this 
engine that we see as "definites".
The inverted design seems to require only moderate modifications.  Testing 
may reveal more.  I'll leave the specific time speculation to Doug.
Yes, it will streamline the cowl to a more aesthetic beauty.  I'm sure you 
all have seen the "hump" on our web site.  I call it the "guppy" look.
See you all at OSH.  We should be allowed to fly there every day.
JP

At 09:40 AM 5/11/2003 +1000, you wrote:
>JP,
>
>Just how much further along is the inverted 200HP Deltahawk realistically 
>(ugh!) likely to be? ....and will it likely have a more streamlined cowl 
>for the Velocity.
>
>Still interested,
>
>Greg in Sydney
>Std RG Velocity Down Under.
>Ph: 9899 2737  Fax: 9899 2726
>----- Original Message -----
>From: <mailto:romott@adelphia.net>Ronnie Brown
>To: <mailto:reflector@tvbf.org>reflector@tvbf.org
>Sent: Sunday, May 11, 2003 8:28 AM
>Subject: Re: REFLECTOR:Rotary 20B dyno Test
>
>And congratulations to you too, JP!!!
>
>A long road with light at the end - I know you are tickled with your new 
>plane and diesel.
>
>Ronnie Brown
>173 Elite RG - Lycasaurus - 34 hours!
>
>
>----- Original Message -----
>From: <mailto:jp@cwebs.com>J.P. Brooks
>To: <mailto:reflector@tvbf.org>reflector@tvbf.org
>Sent: Saturday, May 10, 2003 5:18 PM
>Subject: Re: REFLECTOR:Rotary 20B dyno Test
>
>Great news!
>Best of luck.... seriously.
>JP Brooks
>DeltaHawk, Inc.
>
>
>
>At 01:32 PM 5/9/2003 -0600, you wrote:
>>Rock on, rotory guy.  Very impressive results, and I'm envious of how 
>>silky smooth it's going to be when you get airborne.
>>
>>Dennis Martin
>>Elite FG Chevy V-6
>>
>>>I've completed dynamometer testing of my 3-rotor rotary 
>>>engine.  Overall; I'm very pleased.  Great performance from a normally 
>>>aspirated engine where the all-up installation weighs maybe 45 lbs more 
>>>than a 200 hp Lyc.  It should give me about 270 HP at my max operating 
>>>point of 2900 prop speed.  The following is a post to the rotary engine 
>>>list (including a response from a rotary Guru), and a plot of sea level 
>>>torque and HP.  More info will eventually be available on my website.
>>>
>>>Al Gietzen
>>>
>>>POWER AND TORQUE
>>> >
>>> > Wide open throttle power and torque curves were run after adjusting
>>> > the mixture correction table and the timing.  Mixture setting was
>>> > approximately for maximum power.  Data was initially gathered up to
>>> > about 6000 RPM, but looking at the data showed that the torque curve
>>> > was still flat, and hp increasing, so subsequent runs were made to
>>> > 7000 RPM. Still no break in the hp curve.  Given that the 2.17 redrive
>>> > ratio limits engine RPM to about 6300 (Prop @ 2900), there was no
>>> > point in pushing things further.
>>> >
>>> > The torque curve is distinguished by it's flatness; varying only by 10
>>> > ft-lbs from 210 ft-lbs at 4000 rpm to a peak of 220 ft-lbs at 5000 -
>>> > nearly constant from 4800 to 6800.  The 220 ft-lbs is not
>>> > extraordinary, and could be improved by 9.7 compression rotors vs the
>>> > stock 9.0 rotors that are in the engine.  Mazda's data indicates about
>>> > a 4% increase in power with 9.7 vs 9.0 at 5000 rpm.  It may also
>>> > improve some as the engine wears in - this is an engine with only a
>>> > couple of hours of running since overhaul.
>>>
>>>The 20B is going to make one hell of an aircraft engine.
>>>I can't wait to see one of these engines in an air race.
>>>The Lycoming weenies are going to wonder where the severe head wind came 
>>>from :) And this is only 87 HP per rotor at the benchmark RPM of 6000.
>>>
>>>Paul Lamar
>>>
>>>
>>>
>>>Attachment converted: Macintosh HD:power - torque1.gif (GIFf/ogle) 
>>>(00022A41)

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<html>
Yesterday was the second flight of N211JP.&nbsp; All looks very
good. 
If we had 10 Doug Doers, Dean Bergmans and Dave Driscolls we would be
well under way to the 400 hp V8.&nbsp; They are gleaning so much more out
of this engine that we see as &quot;definites&quot;. 
The inverted design seems to require only moderate modifications.&nbsp;
Testing may reveal more.&nbsp; I'll leave the specific time speculation
to Doug. 
Yes, it will streamline the cowl to a more aesthetic beauty.&nbsp; I'm
sure you all have seen the &quot;hump&quot; on our web site.&nbsp; I call
it the &quot;guppy&quot; look. 
See you all at OSH.&nbsp; We should be allowed to fly there every
day. 
JP 
 
At 09:40 AM 5/11/2003 +1000, you wrote: 
<blockquote type=cite class=cite cite>JP, 
&nbsp; 
Just how much further along is the
inverted 200HP Deltahawk realistically (ugh!) likely to be? ....and will
it likely have a more streamlined cowl for the Velocity. 
&nbsp; 
Still interested, 
&nbsp; 
Greg in Sydney 
Std RG Velocity Down Under. 
Ph: 9899 2737&nbsp; Fax: 9899 2726
<dl>
<dd>----- Original Message ----- 
<dd>From: <a href="mailto:romott@adelphia.net">Ronnie Brown</a> 
<dd>To: <a href="mailto:reflector@tvbf.org">reflector@tvbf.org</a> 
<dd>Sent: Sunday, May 11, 2003 8:28 AM
<dd>Subject: Re: REFLECTOR:Rotary 20B dyno Test 

<dd>And congratulations to you too, JP!!!
<dd>&nbsp;
<dd>A long road with light at the end - I know you are tickled with your
new plane and diesel.&nbsp; 
<dd>&nbsp;
<dd>Ronnie Brown
<dd>173 Elite RG - Lycasaurus - 34 hours!
<dd>&nbsp;
<dd>&nbsp;
<dd>----- Original Message ----- 
<dd>From: <a href="mailto:jp@cwebs.com">J.P. Brooks</a> 
<dd>To: <a href="mailto:reflector@tvbf.org">reflector@tvbf.org</a> 
<dd>Sent: Saturday, May 10, 2003 5:18 PM
<dd>Subject: Re: REFLECTOR:Rotary 20B dyno Test

<dd>Great news!
<dd>Best of luck.... seriously.
<dd>JP Brooks
<dd>DeltaHawk, Inc.

<dd>At 01:32 PM 5/9/2003 -0600, you
wrote:<blockquote type=cite class=cite cite>
<dd>Rock on, rotory guy.&nbsp; Very impressive results, and I'm envious
of how silky smooth it's going to be when you get airborne.<br><br>

<dd>Dennis Martin
<dd>Elite FG Chevy V-6 
<blockquote type=cite class=cite cite>
<dd>I've completed dynamometer testing of my 3-rotor rotary engine.&nbsp;
Overall; I'm very pleased.&nbsp; Great performance from a normally
aspirated engine where the all-up installation weighs maybe 45 lbs more
than a 200 hp Lyc.&nbsp; It should give me about 270 HP at my max
operating point of 2900 prop speed.&nbsp; The following is a post to the
rotary engine list (including a response from a rotary Guru), and a plot
of sea level torque and HP.&nbsp; More info will eventually be available
on my website.
<dd>&nbsp;
<dd>Al Gietzen
<dd>&nbsp;
<dd>POWER AND TORQUE
<dd>&gt;
<dd>&gt; Wide open throttle power and torque curves were run after
adjusting
<dd>&gt; the mixture correction table and the timing.&nbsp; Mixture
setting was
<dd>&gt; approximately for maximum power.&nbsp; Data was initially
gathered up to
<dd>&gt; about 6000 RPM, but looking at the data showed that the torque
curve
<dd>&gt; was still flat, and hp increasing, so subsequent runs were made
to
<dd>&gt; 7000 RPM. Still no break in the hp curve.&nbsp; Given that the
2.17 redrive
<dd>&gt; ratio limits engine RPM to about 6300 (Prop @ 2900), there was
no
<dd>&gt; point in pushing things further.
<dd>&gt;
<dd>&gt; The torque curve is distinguished by it's flatness; varying only
by 10
<dd>&gt; ft-lbs from 210 ft-lbs at 4000 rpm to a peak of 220 ft-lbs at
5000 -
<dd>&gt; nearly constant from 4800 to 6800.&nbsp; The 220 ft-lbs is
not
<dd>&gt; extraordinary, and could be improved by 9.7 compression rotors
vs the
<dd>&gt; stock 9.0 rotors that are in the engine.&nbsp; Mazda's data
indicates about
<dd>&gt; a 4% increase in power with 9.7 vs 9.0 at 5000 rpm.&nbsp; It may
also
<dd>&gt; improve some as the engine wears in - this is an engine with
only a
<dd>&gt; couple of hours of running since overhaul.
<dd>&nbsp;
<dd>The 20B is going to make one hell of an aircraft
engine.
<dd>I can't wait to see one of these engines in an air
race.
<dd>The Lycoming weenies are going to wonder where the severe head wind
came from :) And this is only 87 HP per rotor at the benchmark RPM of
6000.
<dd>&nbsp;
<dd>Paul Lamar
<dd>&nbsp;
<dd>&nbsp;

<dd>Attachment converted: Macintosh HD:power - torque1.gif (GIFf/ogle)
(00022A41)</blockquote></blockquote>
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