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Rotax912ULS/ZodiacXL - selection of propeller???

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Martin Pohl

Joined: 30 Jan 2006
Posts: 118
Location: CH-8645 Jona SG, Switzerland

Posted: Sun May 27, 2007 11:20 am Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

Hi folks



I have to decide on which propeller to install in my Zodiac XL very soon. I did a search through this forum and got some good information about different propeller installations.



Nevertheless I am specifically interested in Rotax 912ULS-powered planes (which prop do you use, what performance do you get).  I still don't know whether I go for a fixed pitch or a constant speed prop.



Looking forward to getting some advice!!!



Cheers Martin

CH601XL "HB-YNA"

_________________
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html

larry(at)macsmachine.com
Guest

Posted: Sun May 27, 2007 1:22 pm Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

Hi Martin,

Your question speaks to a desire to go as fast as we all do, but the 

fixed pitch prop will only give you a narrow range

of performance at top end if you select it that way and if you need to 

get out "short" you'd wish you had considered this

beforehand.  I've also had my Warp Drive adjustable at the low end and 

it will tear you out of the weeds of a short strip

with amazing pull that is not available at the long end of its pitch 

range.  I'd recommend you consider the adjustable prop

for the strength of a good long pitch or a short one as your flying 

demands change.  I believe a fixed pitch is a gamble on

one that compromises best speed and best short field.  I really do like 

the Warp Drive 70 inch tri-blade with a large spinner.

I've seen 133 top end with my Subaru lightly loaded with just me and 24 

gallons fuel and 17 degree pitch.  I've the thick

HDS wings so you'd probably be a bit faster in your XL.

http://www.macsmachine.com/images/completion/full/601ezclosefrtrt.gif



Larry McFarland 601HDS at www.macsmachine.com

Martin Pohl wrote:

 	  Quote: 	
		   



 Hi folks



 I have to decide on which propeller to install in my Zodiac XL very soon. I did a search through this forum and got some good information about different propeller installations.



 Nevertheless I am specifically interested in Rotax 912ULS-powered planes (which prop do you use, what performance do you get).  I still don't know whether I go for a fixed pitch or a constant speed prop.



 Looking forward to getting some advice!!!



 Cheers Martin

 CH601XL "HB-YNA"



 --------

 Martin Pohl

 Zodiac XL QBK

 8645 Jona, Switzerland

 www.pohltec.ch/ZodiacXL





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=115075#115075

rstone4(at)hot.rr.com
Guest

Posted: Sun May 27, 2007 2:09 pm Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

Hay Martin,

     Do you have an English version of your web site.  Maybe I should say an 

American version since we all here in the US speak American which is based 

on English but not quite the same.



Tracy Stone

Harker Heights, Tx

Zodiac601XL w/Jabiru 330

---

amyvega2005(at)earthlink.
Guest

Posted: Mon May 28, 2007 4:03 am Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

tracy,

Thats too funny.  Since India is the largest English speaking country in the world, do they speak English or Idian English?.  (Inglish?)



Sincerely,



Larry the Cable Guy



--

gfmjr_20(at)HOTMAIL.COM
Guest

Posted: Tue May 29, 2007 9:10 am Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

Martin--

  I'm flying a 601XL with a Rotax 912uls turning a woodcomp Klassic prop.  

With a compromise setting for climb and cruise I'm seeing about 120mph at 

5400-5500 with a max of about 129mph.

Typical climb is 1000-1200fpm.



George May

601XL 912s--82 hours



 	  Quote: 	
		  From: "Martin Pohl" <mpohl(at)pohltec.ch>

Reply-To: zenith-list(at)matronics.com

To: zenith-list(at)matronics.com

Subject: Rotax912ULS/ZodiacXL - selection of propeller???

Date: Sun, 27 May 2007 12:20:02 -0700






Hi folks



I have to decide on which propeller to install in my Zodiac XL very soon. I 

did a search through this forum and got some good information about 

different propeller installations.



Nevertheless I am specifically interested in Rotax 912ULS-powered planes 

(which prop do you use, what performance do you get).  I still don't know 

whether I go for a fixed pitch or a constant speed prop.



Looking forward to getting some advice!!!



Cheers Martin

CH601XL "HB-YNA"



--------

Martin Pohl

Zodiac XL QBK

8645 Jona, Switzerland

www.pohltec.ch/ZodiacXL





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=115075#115075






	


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Martin Pohl

Joined: 30 Jan 2006
Posts: 118
Location: CH-8645 Jona SG, Switzerland

Posted: Wed May 30, 2007 2:58 am Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

Hi Larry & George



Thank you for your propeller and performance information! I am still considering a constant speed prop...



Cheers Martin



My homepage is and will be in german only...

_________________
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html

daveaustin2(at)primus.ca
Guest

Posted: Wed May 30, 2007 3:44 am Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

The Arplast prop can be made "constant speed" by a small control unit they 

now sell.

Dave Austin  601HDS - 912, Spitfire Mk VIII

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Wed May 30, 2007 7:54 am Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

I know that both Dave and Martin are not in the US so this doesn't apply to them but for the archive...



If you install an inflight adjustable prop on either a 601 or 701 it is no longer legal for LSA flight.

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

flyingmike9

Joined: 09 Dec 2006
Posts: 33
Location: England

Posted: Wed May 30, 2007 10:12 am Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

i log onto his web site which is very good with Yahoo and it translates the text into english 

a few words are not correct but you get a better idea 



mike



 	  rstone4(at)hot.rr.com wrote: 	
		  Hay Martin,

     Do you have an English version of your web site.  Maybe I should say an 

American version since we all here in the US speak American which is based 

on English but not quite the same.



Tracy Stone

Harker Heights, Tx

Zodiac601XL w/Jabiru 330

---

SkipperClyde

Joined: 30 May 2007
Posts: 12

Posted: Wed May 30, 2007 11:20 am Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

 	  Gig Giacona wrote: 	
		  I know that both Dave and Martin are not in the US so this doesn't apply to them but for the archive...



If you install an inflight adjustable prop on either a 601 or 701 it is no longer legal for LSA flight. 	




You should also be aware that once an airplane no longer meets the requirments for LSA, it can't ever be registerd as an LSA again.

SkipperClyde

601XL O-235

rsteele(at)rjsit.com
Guest

Posted: Wed May 30, 2007 12:22 pm Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

I'm sure you are correct about this.  However the planes we build at

home are not LSA planes anyway.  They are  Amature Homebuilt

Experimental.  The Sport Pilot rule does not require that the the SP

fly only and LSA, but rather any plane that meats the LSA rule - which

the "stock" 601 does.



I'd be curious how an LSA updated with CS prop would be classifed.  It

might actually be unflyable in the US as it no longer meets the LSA

rule, isn't experimental and certainly isn't certified.



Ron

[quote] ------

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Wed May 30, 2007 12:33 pm Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

I doubt it would be any different than a C-150 that you yanked of the original prop and installed an in-flight adjustable without a STC.



Not Airworthy.



I asked the FSDO about this question. I can't find the e-mails but I gave 

them a couple of scenarios and asked if it would be LSA legal.



One was an in-flight adjustable that had an out of cockpit lockout that 

could be set to turn off the in-flight adjustability when being used under 

the LSA rules. They said no.



I also asked about what if I put an in-flight adjustable on now and flew it 

as a PSEL and then later decided to convert it to a ground adjustable prop 

and fly it as an LSA and they didn't give me a solid yes or no. When I asked about it during a follow up phone call they said they were asking higher authority because of an issue they did know about but they weren't 100% sure if it would carry over to a Homebuilt or not. They never did get back to me.



The issue was if a plane was ever granted airworthiness status that made it not LSA legal it could not be changed back to LSA legal status. The example they gave me was certain models and mods to the Ercoupe. I may have my model numbers wrong but basically the C model is LSA legal and the D isn't. The difference is Max GW. There is a mod that can be applied to the C that makes it a D and if that mod has been applied it can never be a LSA legal plane again even if you remove whatever that mod was.



Just for the record this was the Little Rock AR FSDO.

[quote="rsteele(at)rjsit.com"]I'm sure you are correct about this.  However the planes we build at

home are not LSA planes anyway.  They are  Amature Homebuilt

Experimental.  The Sport Pilot rule does not require that the the SP

fly only and LSA, but rather any plane that meats the LSA rule - which

the "stock" 601 does.



I'd be curious how an LSA updated with CS prop would be classifed.  It

might actually be unflyable in the US as it no longer meets the LSA

rule, isn't experimental and certainly isn't certified.



Ron

[\quote]

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

skyguynca

Joined: 05 Jun 2006
Posts: 128

Posted: Wed May 30, 2007 1:32 pm Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

Ok, as long as a plane meets LSA criteria it can be flown by a SP. If you 

build a plane with a inflight adjustable prop then remove it later for a 

fixed pitch, and the rest of the plane is still LSA criteria then yes a SP 

can fly it. You can fly any plane that meets the criteria even if it is IFR 

rated, just as long as the landing gear is fixed, ground adjustable prop and 

top speed below 238 mph and gross weight less than 1380lbs. As a home built 

you can remove the cs prop and change it to fixed or viseversa with just a 

log book entry and a corrected weight and balance, with a certified airplane 

that is a whole new kettle of fish that requires a 337 be filed and atleast 

a field approval before flight. Mentioning the mod to the C to made it a D, 

yeah even if you remove the mod it is still a D until all the paper work is 

done, including the 337 and verification by your local FAA inspector.



David Mikesell

23597 N. Hwy 99

Acampo, CA 95220

209-224-4485

skyguynca(at)skyguynca.com

www.skyguynca.com

skyguynca

Joined: 05 Jun 2006
Posts: 128

Posted: Wed May 30, 2007 3:55 pm Post subject: Rotax912ULS/ZodiacXL - selection of propeller???

OOOOPSSSSSSSS, speed should be 138mph not 238



David Mikesell

23597 N. Hwy 99

Acampo, CA 95220

209-224-4485

skyguynca(at)skyguynca.com

www.skyguynca.com

---

Martin Pohl

Joined: 30 Jan 2006
Posts: 118
Location: CH-8645 Jona SG, Switzerland

Posted: Thu May 31, 2007 10:42 am Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

Check out this prop (which is already available for the Jabiru and will hopefully be available for the Rotax in time...): http://www.silence-aircraft.co.uk/silence%20twister%20propeller.htm



Constant speed prop without controls in the cockpit - perhaps that would even comply with LSA??? I will have a closer look at this prop for sure!!!



Cheers Martin

_________________
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Fri Jun 01, 2007 1:23 pm Post subject: Re: Rotax912ULS/ZodiacXL - selection of propeller???

Over $5000 for a prop!

 	  Martin Pohl wrote: 	
		  Check out this prop (which is already available for the Jabiru and will hopefully be available for the Rotax in time...): http://www.silence-aircraft.co.uk/silence%20twister%20propeller.htm



Constant speed prop without controls in the cockpit - perhaps that would even comply with LSA??? I will have a closer look at this prop for sure!!!



Cheers Martin

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

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