From: "Tracy Crook rwstracy@gmail.com" <flyrotary@lancaironline.net>
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Date: Sat, 17 Mar 2018 21:53:24 -0400
Subject: Re: [FlyRotary] Re: Glasair Testing
Message-Id: <D83F6B6B-F8EE-4ACA-801D-8E2801DEBE45@gmail.com>
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In-Reply-To: <list-10852811@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Was thinking of the RV-4 but now that you ask, the rad size was from RV-8.  T=
he oil cooler was the RV-4.  I used two 10 x 9 x 4 evaporator cores for rad o=
n the 4.

Tracy

Sent from my iPad

> On Mar 17, 2018, at 20:13, Stephen Izett stephen.izett@gmail.com <flyrotar=
y@lancaironline.net> wrote:
>=20
> Tracy
> When you say the rad and oil cooler are the same size as yours, were you r=
eferring to the RV 4 or 8?
> Steve
>=20
>> On 18 Mar 2018, at 8:08 am, Stephen Izett stephen.izett@gmail.com <flyrot=
ary@lancaironline.net> wrote:
>>=20
>> Thanks Tracy.=20
>> Much appreciated.
>>=20
>> Steve
>>> On 18 Mar 2018, at 7:48 am, Tracy Crook rwstracy@gmail.com <flyrotary@la=
ncaironline.net> wrote:
>>>=20
>>> The rad is the same size as mine so should be OK, oil cooler about the s=
ame as mine too.  Success depends as much on volume through them as size tho=
ugh.  I can=E2=80=99t guess on the inlet size since your airspeed will be hi=
gher than mine.  In my experience cooling on ground had very little bearing o=
n how it works in flight. =20
>>>=20
>>> When you are committed to first flight, don=E2=80=99t wait for full oil &=
 water temps,  start takeoff run as soon as min. temps reached if possible. =
  I use 120 F. as min.  That will give best chance to make it around the pat=
tern for quick landing before overheating if cooling is not good enough.  I d=
id many one circuit flights in the early days : )
>>>=20
>>> Tracy
>>>=20
>>> Sent from Mail for Windows 10
>>>=20
>>> From: Stephen Izett stephen.izett@gmail.com
>>> Sent: Saturday, March 17, 2018 7:13 PM
>>> To: Rotary motors in aircraft
>>> Subject: [FlyRotary] Re: Glasair Testing
>>>=20
>>> Hi Tracy.=20
>>>=20
>>> When you said you agree with Todd, was this in relation to the oil coole=
r appearing to be on the small side?
>>>=20
>>>=20
>>> Any other observation re temps etc?=20
>>>=20
>>> Water Cooler - 13x17.7x2.35 giving 541in3 fed by 20in2 right cheek which=
 gets very little air from the prop.
>>>=20
>>> Oil Cooler - turbo rx7 11x8.75x2 giving 193in3 fed by 7.4in2 inlet 12=E2=
=80=9D below spinner, which gets better prop blast.
>>>=20
>>> See photo for inlets (left cheek feeds air filter and cooling of coils o=
nly. Right cheek is mirror image)
>>>=20
>>>=20
>>> Thanks again for your gearbox, controllers and knowledge base over the y=
ears.
>>>=20
>>> Very much appreciated.
>>>=20
>>>=20
>>> Steve Izett
>>>=20
>>>=20
>>> On 18 Mar 2018, at 4:03 am, Tracy Crook rwstracy@gmail.com <flyrotary@la=
ncaironline.net> wrote:
>>>=20
>>> Hi Steve,
>>> I agree with Todd=E2=80=99s comments.  The EM2/3 will not give reliable a=
irspeed readings below around 20 MPH due to the limitations of the sensor us=
ed and resolution of the ADC in the EM3.
>>>=20
>>> Glad to see the progress!
>>>=20
>>> Tracy
>>>=20
>>> Sent from Mail for Windows 10
>>>=20
>>> From: Stephen Izett stephen.izett@gmail.com
>>> Sent: Saturday, March 17, 2018 5:35 AM
>>> To: Rotary motors in aircraft
>>> Subject: [FlyRotary] Re: Glasair Testing
>>>=20
>>> Hi guys
>>>=20
>>> I repotted the graph using gps ground speed (there was no breeze that da=
y) as it shows the lower speed taxing where the airspeed indicator doesn=E2=80=
=99t down low.
>>>=20
>>> Cheers
>>>=20
>>> Steve Izett
>>> <69C652B733844F5DB5ECD4A530438876.jpg>
>>>=20
>>>=20
>>>=20
>>>=20
>>>=20
>>> On 17 Mar 2018, at 5:28 pm, Stephen Izett stephen.izett@gmail.com <flyro=
tary@lancaironline.net> wrote:
>>>=20
>>> HI Todd
>>> Thanks for the feedback. And yes the manifold pressure does make sense, I=
 was upside down expecting a lower manifold pressure at WOT. Doh!
>>> I=E2=80=99m colourblind and cant differentiate between some of those col=
ours so was getting confused.=20
>>>=20
>>> Yes that Cri Cri is an interesting and tiny machine.
>>> Dawie and Sarki are great guys with heaps of experience and have been so=
 very helpful.
>>> They bring it out every time we have an open day at our club. The crowds=
 love it.
>>>=20
>>> On another note I=E2=80=99m very interested in the possibility of turboi=
ng the renesis in the future if all else goes well.
>>> What turbo are you using, what level of boost do you use and what hp do y=
ou think this is creating?
>>>=20
>>> Thanks again
>>>=20
>>> Steve Izett
>>>=20
>>>=20
>>>=20
>>> On 17 Mar 2018, at 4:29 pm, Todd Bartrim bartrim@gmail.com <flyrotary@la=
ncaironline.net> wrote:
>>>=20
>>> Hi Steve;
>>> The manifold looks like exactly what I would expect to match your RPM, s=
o no worries there. The temps don't look too bad to me. Possibly your oil co=
oling might be little low as it begins to increase rapidly when you add powe=
r and during an extended climb-out you may see that get a little hotter than=
 you like, but it looks like it stabilizes quickly when you reduce the power=
.
>>> If everything else is performing well (fuel, electrical) then I don't se=
e why it's not time to see how it cools in the air. That's a quick plane so m=
y guess is that if you have enough ground cooling for indefinate ground oper=
ation, you may find excess cooling (and drag) in the air.
>>>=20
>>> But the real reason I'm responding right now is not rotary related....  A=
 JET POWERED CRI CRI???? Holy s**t, what will they do next! So I found the Y=
ouTube video of it (VH-ZSE right?) That's pretty cool!
>>>=20
>>> Todd
>>> C-FSTB
>>> RV9 Turbo13B
>>>=20
>>> Todd Bartrim
>>>=20
>>> On Fri, Mar 16, 2018 at 6:29 PM, Stephen Izett stephen.izett@gmail.com<f=
lyrotary@lancaironline.net> wrote:
>>> Hi people
>>>=20
>>> Continued testing the Glasair Super IIRG yesterday with an OAT of 70. Se=
e graph of 13 minutes of data (Note: temps in C, Speed in Knots)
>>>=20
>>> Apart from collecting data on the cooling I flooded my system with adren=
aline.
>>>=20
>>> On the second run as I hit about 45knots I encountered very high vibrati=
on with no warning. I braked and turned of the engine thinking it emanated f=
rom the engine/prop.
>>> After leaving the runway and stopping for a few moments I tried a restar=
t, and found all perfectly normal. Previously I had encountered huge missing=
 at rpm so immediately thought that was the issue.
>>> Having wrongly diagnosed the phenomenon I taxied back and did another ru=
n seeking to emulate the fault. Well this time I got up to about 47knots and=
 all hell broke loose.=20
>>> I was barely able to control her, leaving the strip and into the ruff. O=
ver the radio came the call =E2=80=9Cif you continue with that front nose sh=
immy you will destroy your aircraft=E2=80=9D.=20
>>> Well I had no interest in continuing the testing at that stage but was v=
ery thankful for the feedback from someone watching on. With my lack of expe=
rtise I had completely failed to realise what was happening.
>>>=20
>>> Back to the hangar and pulled the Shimmy Damper apart. Oil had gotten in=
 at some point, so cleaned it up and re torqued the assembly.
>>>=20
>>> A friend on our airstrip with extensive experience in many different air=
craft (he has an RV8, Longezy, jet powered cir cri, Comanche twin) then took=
 it out with me (data not provided) and he confirmed he thought the aircraft=
 seemed very responsive (shimmy Damper a little to tight now) and proceeded t=
o lift the nose off for the first time under its own power at a little over 5=
0 knots.
>>>=20
>>> So some big lessons for me in relation to my expertise and risk profilin=
g.
>>> Temps still concerning but I=E2=80=99m wondering if there is enough capa=
city to attempt flight testing.
>>> I would appreciate any wisdom that any of you glean from the log data. (=
I expected a different result from the manifold readings, so not sure what i=
s going on there)
>>>=20
>>> Thanks
>>>=20
>>> Steve Izett
>>> Perth WA - Glasair Super IIRG with Renesis 4 port, RD1C, EM3, EC3
>>>=20
>>> <Testing 16th March 18.jpeg>
>>>=20
>>>=20
>>>=20
>>>=20
>>> --
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>>>=20
>>>=20
>>> <69C652B733844F5DB5ECD4A530438876.jpg>--
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/Li=
st.html
>>>=20
>>>=20
>>> <VH-EXP.jpeg>--
>>> Homepage:  http://www.flyrotary.com/
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st.html
>>=20
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
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t.html
>=20
>=20
> --
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