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Choice of engine for the CH 601HDS

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charlesmcg(at)citlink.net
Guest

Posted: Thu Aug 23, 2007 8:26 pm Post subject: Choice of engine for the CH 601HDS

Having acquired a partially complete 601 HDS kit, which I intend to 

complete as an E-LSA, I would like to hear comments on the broad 

question below!



How do the Subaru and Corvair engines stack up against Rotax & Jabiru 

when you take cost, installation, available technical support, weight 

and final performance into account?  And are there any 601 builders 

reasonably close to Sacramento, CA?



Sincerely



-- 

Charles McGloughlin                    Email - charlesmcg(at)citlink.net

8654 Bluefield Way                     Phones -  Cell   (916)832-0654

Sacramento, CA 95823                             Home   (916)689-7701

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zodierocket(at)hsfx.ca
Guest

Posted: Thu Aug 23, 2007 8:43 pm Post subject: Choice of engine for the CH 601HDS

If you want it to be an ELSA, I believe that you will need it flying by

December of this year. However I may be wrong as I am a Canadian and not

fully up on the U.S. LSA. IF it is true and to meet the ELSA category by

December, you will have to order a Rotax or Jabiru in the next week in

order to have a chance to make the deadline. IF you go auto conversion,

typically add another year to your construction. Also a missed deadline.



Mark Townsend

Can-Zac Aviation Ltd.

president(at)can-zacaviation.com

www.can-zacaviation.com 

--

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psm(at)ATT.NET
Guest

Posted: Fri Aug 24, 2007 3:03 am Post subject: Choice of engine for the CH 601HDS

Hi Mark,



I believe you are correct about the deadline for E-LSA certificates 

for our planes, but the deadline is actually January 31, 2008.  I 

don't think it matters very much, though.  After that date all of the 

planes we build will need E-AB airworthiness certificates.  This is 

not a problem -- just a few small differences in the phase 1 flight 

test requirements and repairman certificate qualifications.  E-AB 

planes qualify for Sport Pilot use with exactly the same 

qualifications and restrictions as E-LSA.



For Charles -- All of the engines you mentioned can be used in a 

CH601HDS.  The auto conversions are the heaviest and seem to provide 

the least performance for the lowest dollar cost.  The Rotax and 

Jabiru cost about the same new and weigh about the same.  Performance 

from the Rotax seems slightly better than the auto conversions while 

the Jabiru is significantly more powerful than the Rotax.



I don't know the current lead times for Rotax engines.  Jabiru 3300 

had a 3-5 month lead time when I ordered mine in April this year.



One small point on the HDS.  To qualify as LSA you need to pay 

attention to the stall speed and cruise speed for this model.  You 

get to specify the exact numbers for your plane when it is certified, 

but if you choose the wrong numbers it will not qualify as LSA.  Some 

HDS examples have a stall speed that is too high for this purpose, 

while others just go too fast.  Once again, this is not related to 

the choice of airworthiness certificate but it will impact whether or 

not a Sport Pilot can fly your plane.



Paul

XL fuselage

do not archive



At 09:43 PM 8/23/2007, you wrote:

[quote]



If you want it to be an ELSA, I believe that you will need it flying by

December of this year. However I may be wrong as I am a Canadian and not

fully up on the U.S. LSA. IF it is true and to meet the ELSA category by

December, you will have to order a Rotax or Jabiru in the next week in

order to have a chance to make the deadline. IF you go auto conversion,

typically add another year to your construction. Also a missed deadline.



Mark Townsend

Can-Zac Aviation Ltd.

president(at)can-zacaviation.com

www.can-zacaviation.com

--

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rickpitcher

Joined: 27 Feb 2007
Posts: 76

Posted: Fri Aug 24, 2007 7:24 am Post subject: Re: Choice of engine for the CH 601HDS

 	  charlesmcg(at)citlink.net wrote: 	
		  Having acquired a partially complete 601 HDS kit, which I intend to 

complete as an E-LSA, I would like to hear comments on the broad 

question below!



How do the Subaru and Corvair engines stack up against Rotax & Jabiru 

when you take cost, installation, available technical support, weight 

and final performance into account?  And are there any 601 builders 

reasonably close to Sacramento, CA?



Sincerely



-- 

Charles McGloughlin                    Email - charlesmcg(at)citlink.net

8654 Bluefield Way                     Phones -  Cell   (916)832-0654

Sacramento, CA 95823                             Home   (916)689-7701 	




I went through the same thing a few years ago when it was time to pick a powerplant.  So many choices it's hard to decide which one to use. You have to decide if you want the max performance or the lowest initial price.  I ended up going with the Jabiru 3300. It's the lightest of the group, and the most horsepower. I'm happy with the choice.



The auto conversions are really inviting because of their lower cost and familiarity, but by the time you add the PSRU the extra weight and $$$ starts to add up. You might wish later that you'd spent a couple thousand more for a lighter/stronger powerplant in the first place. 



 

You're going to have to come in on the lightweight side if you want those little HDS wings to be meet LSA stall speeds. 

While you're building and contemplating "improvements", remember the homebuilder's adage:  "Add only lightness and simplicity".

Rick Pitcher

CH601HD

(considering another build...)

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Gig Giacona

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

Posted: Fri Aug 24, 2007 7:39 am Post subject: Re: Choice of engine for the CH 601HDS

And just to reduce possible future confusion there isn't a need for a PSRU on the Corvair auto coversion.



 	  rickpitcher wrote: 	
		  

The auto conversions are really inviting because of their lower cost and familiarity, but by the time you add the PSRU the extra weight and $$$ starts to add up. You might wish later that you'd spent a couple thousand more for a lighter/stronger powerplant in the first place.

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

rickpitcher

Joined: 27 Feb 2007
Posts: 76

Posted: Fri Aug 24, 2007 8:19 am Post subject: Re: Choice of engine for the CH 601HDS

 	  Gig Giacona wrote: 	
		  And just to reduce possible future confusion there isn't a need for a PSRU on the Corvair auto coversion.



 	  rickpitcher wrote: 	
		  

The auto conversions are really inviting because of their lower cost and familiarity, but by the time you add the PSRU the extra weight and $$$ starts to add up. You might wish later that you'd spent a couple thousand more for a lighter/stronger powerplant in the first place. 

	
	




Yes. Gig is absolutely correct. There are some excellent auto conversions aout there. the Corvair has been a popular choice for 3 decades now. Very well suited to aircraft use. 

The Subaru was the auto engine conversion that I almost went for. I REALLY wanted to find a fuel injected Honda conversion but was surprised to find very few Honda powered airplanes.



My choice was made when I found a "new in the crate" Jabiru 3300 a few hundred miles nor'east across the mighty Colorado River for a very decent price. 

A lucky break 



Rick

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