Today's Message Index:
----------------------
0. 12:46 AM - What's My Contribution Used For? (Matt Dralle)
1. 05:08 AM - Re: IVO first flight (Kayberg@AOL.COM)
2. 05:24 AM - Re: Re: IVO first flight (Kayberg@AOL.COM)
3. 05:52 AM - Re: Re: IVO first flight (Kayberg@AOL.COM)
4. 06:20 AM - Re: Re: IVO first flight (N1BZRich@aol.com)
5. 12:41 PM - Fw: Glasair's "Two Weeks to Taxi" Gets Two Thumbs Up from FAA (Roy Schechter)
6. 01:46 PM - Nose wheel forks and axle (Colin J. Kennedy)
7. 02:40 PM - Re: Re: IVO first flight (Kayberg@AOL.COM)
8. 03:27 PM - Re: Nose wheel forks and axle (John Eynon)
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Subject: | What's My Contribution Used For? |
Dear Listers,
Some have asked, "What's my Contribution used for?" and that's a good question.
Here are just a few examples of what your direct List support enables. It provides
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But most importantly, your List Contribution enables a forum where you and your
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It is YOUR CONTRIBUTION that directly enables these many aspects of these valuable
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List Contribution Web Site:
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Thank you for your support!
Matt Dralle
Email List Administrator
Message 1
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Subject: | Re: IVO first flight |
In a message dated 11/14/2008 6:45:22 P.M. Eastern Standard Time,
dashvii@hotmail.com writes:
Doug,
Are there any pics of the IVO on the Lightning. Also, when converting an
IVO to a two blader, do you use the same blades: profile, pitch, and chord?
Brian W.
No pics just yet. Need a little more time and weather. Plus, there is no
spinner. It was also necessary to change the prop extension back to the stock
shorter one.
The IVO Medium blades are all the same. They can vary in length, the ones
tested are 62". Supposedly a 68" blade will work on a Jab 3300 also.
Doug
Message 2
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Subject: | Re: IVO first flight |
In a message dated 11/15/2008 2:33:26 A.M. Eastern Standard Time,
selwyn@ellisworks.com.au writes:
--> Lightning-List message posted by: "selwyn" <selwyn@ellisworks.com.au>
"If you have some kind of prop strike, the IVO easily disintegrates, usually
saving the engine crankshaft. Supposedly it is good for up to 150 hp and 250
mph. We shall see."
Hmmm. Not sure if I like a prop that easily disintegrates as that would
imply that the margins are rather fine and perhaps more likely to shed a blade
in "normal" circumstances. I think I would prefer some additional protection
against that instead of the possibility that I may prevent crank damage if I
was silly enough to run my prop into something hard.
If anyone is interested in more info I've compiled a list of links to prop
makers, including IVO, here:
_http://www.recreationalflying.com.au/links/propellers-4/_
(http://www.recreationalflying.com.au/links/propellers-4/)
The IVO props may not be for everyone. Some people cannot deal with a prop
where the tips can flex as much as 12" or perhaps more. They are also
noisy.
Our experience is that they outperform anything else: more thrust on
takeoff and higher top speeds...at least in other applications. There are
tradeoffs.
They do not like rain or seaplane operations.
If the hub is kept torqued correctly, they do not shed a blade under "normal
circumstances"
No question that a " wooden fence post" prop is less likely to shed a blade.
It is also very difficult to adjust the pitch.
doug
Message 3
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Subject: | Re: IVO first flight |
In a message dated 11/15/2008 7:53:02 P.M. Eastern Standard Time,
N1BZRich@aol.com writes:
Unless IVO has changed their blade design, I doubt that their props will be
as efficient as the Sensenich models that have been so successful on the
Lightning. The original IVO props were designed for the Rotax which of course
have a "gear down transmission" to reduce prop speed. The slower turning props
can use a longer diameter and narrow blades. It has been a while since I
took Aero 101, but I think the best propeller tip speed for efficiency is about
.75 mach. Since the Jabiru is a direct drive "airplane" engine, the prop
rpm is the same as engine rpm and you have a more "normal" looking prop and
blade profile that works best. Of course as everyone knows making propellers
is
part science and part black magic, so who really knows what will work best
on a specific airframe and engine combination until you try it. So glad the
Green Landing guys are trying it again.
Buz
I understand the theory; that the difference in prop tip speed will make the
IVO less efficient. However, with a Rotax 912-s we swing a 72" three
blade. The 3300 Jab has a 62" prop. Perhaps the IVO is optimised for the
greater RPMs.
We are talking about much thinner Kevlar blades on the IVO, rather the
wooden fence post of a Senny. Even the composite blades of the ground adjust
Sennsenich are much thicker than the IVO.
Also the IVO blades are all the same. Not true with a wooden prop. Each
prop is subject to some variation as moisture content changes. Uneven
moisture retention can make for vibrations.
The guru on the Tailwind site buys wooden props and then sands the profile
of the tips a bit to get more speed out of them. His planes outrun higher
horsepower RV's. However, he has built 10 Tailwinds from scratch and has
reshaped a lot of props.
It seems that everyone who buys wooden props tends to accumulate a selection
of them. That gets a little pricey after while. Once you have one of
them hanging on the wall of your living room and one hanging on your plane, the
rest are as helpful as unused golf clubs.
Additiionally, the point of the IVO in question is to have in-flight adjust.
There is even a constant-speed controller if you want one. So blade
profile may be less important.
doug
Message 4
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Subject: | Re: IVO first flight |
In a message dated 11/16/2008 8:52:58 A.M. Eastern Standard Time,
Kayberg@AOL.COM writes:
Uneven moisture retention can make for vibrations.
Doug,
Excellent point, and a good reminder for wooden prop users.. That is
why all wooden props should always be left in the horizontal position when
the airplane is parked. That way, the prop blades accumulate moisture at the
same rate or amount and you do not get an out of balance blade that would
indeed cause vibration on start up.
Keep us informed on the IVO testing. But I am still curious as to the
175 mph speed you mentioned. Was that WOT?
Blue Skies,
Buz
**************Get the Moviefone Toolbar. Showtimes, theaters, movie news &
p://toolbar.aol.com/moviefone/download.html?ncid=emlcntusdown00000001)
Message 5
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Subject: | Fw: Glasair's "Two Weeks to Taxi" Gets Two Thumbs Up from |
FAA
=0A=0A=0A=0A----- Forwarded Message ----=0AFrom: Harry DeLong <harry.delong
@glasairaviation.com>=0ATo: Harry DeLong (E-mail) <harry.delong@glasairavia
tion.com>=0ASent: Friday, November 14, 2008 7:56:47 PM=0ASubject: Glasair's
"Two Weeks to Taxi" Gets Two Thumbs Up from FAA=0A=0A=0AIf you=92ve been h
olding off on purchasing a =93Two Weeks to Taxi=94Sportsman due to the unce
rtainty of it=92scompliancewith the 51% rule, your prayers have been answer
ed!- The FAA recently reviewed the =93Two Weeks To Taxi=94program and fou
nd that the lean manufacturing processes employed, combined with the provid
ed educational assistance, accelerates the Sportsman build time significant
ly without violating the spirit or intent of the 51% Rule. (See below for m
ore details.)- =0A-=0APlease note that we still have a few spots availa
ble with 2008 pricing in the 1st quarter of 2009 at a savings of 7%.- Cal
l if you have any questions or want to get one of the few remaining slots!
=0A-=0AAlso, if you haven=92t yet seen the video that Evan Farmer put tog
ether of his experience building a =93Two Weeks To Taxi Sportsman=94, check
it out at: http://www.youtube.com/watch?v=JmPZbfYWNT0 =0A-=0AHarry Del
ong=0A_________________________=0A-=0AGlasair=92s Two Weeks to Taxi =0AGe
ts Two Thumbs Up from FAA=0A-=0AArlington, WA, November 11, 2008=97 Durin
g the week of November 3, 2008, members of the FAA=92s Production and Airwo
rthiness Division (AIR-200) traveled to Glasair Aviation=92s facility in Ar
lington, Washington to review Glasair=92s =91Two Week To Taxi=92 program in
terms of whether or not such a program could comply with the =91major port
ion=92 requirement of Part 21, Section 21.191(g).- The FAA=92s on-site te
am found that the =93lean manufacturing=94 processes employed, combined wit
h the provided educational assistance, accelerates the Sportsman build time
significantly without violating the spirit or intent of Part 21, Section 2
1.191(g).- =0A-=0A=93We couldn=92t be more excited about the results of
this visit by the FAA=94 says Glasair=92s CEO Mikael Via.- =93I want to
sincerely thank Mr. Frank Paskiewicz, head of the FAA=92s production and ai
rworthiness division, for bringing his team all the way from Washington, D.
C. to take a look at the unique opportunity we=92ve developed at Glasair.
=94 =0A-=0APaskiewicz and the FAA=92s Amateur-Built Rulemaking Committee
have been at the center of vigorous public debate on proposed new policies
for administering and enforcing the 51 percent rule for amateur-built aircr
aft.=0A-=0AGlasair=92s =91Two Weeks to Taxi=92 Program had been somewhat
controversial since its introduction in 2006 because it is the first progra
m ever developed which allows builders access to a very organized, systemat
ic course that takes them on a step by step building program that ends with
their airplane taxing from the hangar under its own power.- =0A-=0A-
=93We have worked very, very hard to develop a program that makes aircraft
building more accessible, more organized, and as efficient as possible, whi
le staying within the letter and spirit of the amateur built rule,=94 says
Via.- This new finding from the FAA will allow Glasair=92s Two Weeks to T
axi program to grow and expand.- =0A-=0AGlasair=92s Two Weeks to Taxi p
rogram recently celebrated its 100th customer-built aircraft.=0A-=0AFor m
ore information, visit the company=92s website at www.GlasairAviation.com
- or call 360.435.8533 x232.-=0A-=0A-=0AHarry DeLong=0AGlasair Avia
tion=0A18810 59th Ave NE=0AArlington, WA 98223=0A360-435-8533 x 232 phone
=0A360-435-9525 fax=0Aharry.delong@glasairaviation.com=0Awww.glasairaviatio
n.com=0A=0A=0A
Message 6
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Subject: | Nose wheel forks and axle |
Section 38 of the manual says
"5.Locate the phenolic nose fork spacers (see photo below) and the
AN3-26A bolts, AN960-10 washers (one washer under head and another under
nut) and AN365-1032A nylocks."
Even with the washer under the head removed, not enough threads protrude
through to secure the nut. Should I get longer bolts or sand the phenolic
spacers?
The nose wheel axle bolt shank is too short to pass though both forks, such
that the threaded portion is passing through the second fork. Do I need a
bolt with a longer shank, or is this acceptable?
By making the axle spacers the right length, I can make the wheel bearings
ride on the shank.
Colin K.
OK
Lightning # 52 under construction.
http://www.mykitlog.com/cojaken
Message 7
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Subject: | Re: IVO first flight |
In a message dated 11/16/2008 9:20:51 A.M. Eastern Standard Time,
N1BZRich@aol.com writes:
Keep us informed on the IVO testing. But I am still curious as to the 175
mph speed you mentioned. Was that WOT?
As best I understood, it was WOT with the prop "bit in" , ie the blades were
adjusted to give a less than 3300 rpm. Because of the shortness of the
flight, the uncertainty of the airspeed indicator and limited
experimentation, the number of 175 was offered. Again, this was the fastest
the bird has
seen at a full power flat run.
doug
Message 8
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Subject: | Re: Nose wheel forks and axle |
Colin,
As I recall, I needed longer bolts for the nose fork assembly, and
the stop bolt. I think the spacer blocks are a little larger now
then they were originally, which changed the required hardware. I'm
pretty sure I used the original axle bolt though.
John Eynon
( Purveyor of Quality Correspondence Since 1983 )
On Nov 16, 2008, at 3:44 PM, Colin J. Kennedy wrote:
>
> Section 38 of the manual says
>
> "5.Locate the phenolic nose fork spacers (see photo below) and the
> AN3-26A bolts, AN960-10 washers (one washer under head and another
> under nut) and AN365-1032A nylocks."
>
> Even with the washer under the head removed, not enough threads
> protrude through to secure the nut. Should I get longer bolts or
> sand the phenolic spacers?
>
> The nose wheel axle bolt shank is too short to pass though both
> forks, such that the threaded portion is passing through the second
> fork. Do I need a bolt with a longer shank, or is this acceptable?
>
> By making the axle spacers the right length, I can make the wheel
> bearings ride on the shank.
>
> Colin K.
> OK
> Lightning # 52 under construction.
> http://www.mykitlog.com/cojaken
>
>
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