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Gross weight?

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Dwight Early

Joined: 15 Jul 2008
Posts: 17
Location: Indiana

Posted: Fri Oct 03, 2008 6:28 am Post subject: Gross weight?

Hi everyone, I am joining the world of Zenith 701 on Saturday. My question is, does anyone fly at gross weight with a Revmaster 75 hp direct drive. I had planned on taking a buddy with me to pick it up, and am curious if anyone else is flying grossed out.

The owner can't answer the question because he has just flown the 40 hours off, and all have been pilot only.

Any thoughts?  Grass at 400 msl about 2200 feet long.

(I now fly a Kitfox 1 with 532 rotax that will do this.)



Thanks Dwight

Kitfox 1

Cessna 150

soon CH701

_________________
Dwight Early
N701EF
Zenith CH701/Revmaster
Daleville, In

Tommy Walker

Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207

Posted: Fri Oct 03, 2008 9:59 am Post subject: Re: Gross weight?

Dwight,



I'm not too sure how many Revmaster powered 701 owners you will find on this list.  But, I can tell you the 701 will fly well at gross, W&B considered.  



It's all about thrust.  You might experiment with first yourself, then maybe 100 lbs of dead weight in the right seat, then add 50 more lbs. etc. till you get to gross.



email me at twalker(at)cableone.net if you want more info.



Tommy Walker in Alabama

N8701

88 + Hours



 	  Dwight Early wrote: 	
		  Hi everyone, I am joining the world of Zenith 701 on Saturday. My question is, does anyone fly at gross weight with a Revmaster 75 hp direct drive. I had planned on taking a buddy with me to pick it up, and am curious if anyone else is flying grossed out.

The owner can't answer the question because he has just flown the 40 hours off, and all have been pilot only.

Any thoughts?  Grass at 400 msl about 2200 feet long.

(I now fly a Kitfox 1 with 532 rotax that will do this.)



Thanks Dwight

Kitfox 1

Cessna 150

soon CH701

_________________
Tommy Walker
N25A - Anniston, AL

ch701builder(at)yahoo.com
Guest

Posted: Fri Oct 03, 2008 10:47 am Post subject: Gross weight?

Tommy, Dwight, and all,

I read somewhere, of a procedure to add more and more weight until gross, was part of the 40hr Phase I flight testing.

I had planned on adding (in 20# increments) to the passenger seat, and then go do plane performance with the added weight. Then land, and add another 20#, and repeat all tests.

Isn't this part of the Phase I testing, or was I just thinking it was (which I plan on doing anyway)?



Keith

CH701-scratch -- starting on forward cabin area.

N 38.9940

W 105.1305

Alt. 9,100'

(expecting SNOW this weekend!)

*********************************************************************************************

---

Tommy Walker

Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207

Posted: Fri Oct 03, 2008 11:35 am Post subject: Re: Gross weight?

Yes it is a part of our Phase I testing.  We did it.  Used 50lb sacks of 

fertilizer and a couple of 25lb weights.  



I was under the impression that was what Phase I testing was all about, flying the airplane at all configurations in order to test climb, stall, turns, etc....



We certified our airplane's VX, VY, etc at gross and it is a part of our log book entry at the conclusion of Phase I.....



Tommy



80 degrees here today, 50's tonight



Do Not Archive

 	  ch701builder(at)yahoo.com wrote: 	
		  Tommy, Dwight, and all,

I read somewhere, of a procedure to add more and more weight until gross, was part of the 40hr Phase I flight testing.

I had planned on adding (in 20# increments) to the passenger seat, and then go do plane performance with the added weight. Then land, and add another 20#, and repeat all tests.

Isn't this part of the Phase I testing, or was I just thinking it was (which I plan on doing anyway)?



Keith

CH701-scratch -- starting on forward cabin area.

N 38.9940

W 105.1305

Alt. 9,100'

(expecting SNOW this weekend!)

*********************************************************************************************

---

_________________
Tommy Walker
N25A - Anniston, AL

randy(at)rjhebertassoc.co
Guest

Posted: Fri Oct 03, 2008 12:12 pm Post subject: Gross weight?

I LOVE IT

50# sacks of rice, wheat, flour.... but NOOOOOO fertilizer



That's great Tommy



Definitely

Do Not Archive



Randall J Hebert



Yes it is a part of Phase I testing.  We did it.  Used 50lb sacks of 

fertilizer and a couple of 25lb weights.  



80 degrees here today, 50's tonight



Do Not Archive

Tommy Walker

Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207

Posted: Fri Oct 03, 2008 7:33 pm Post subject: Re: Gross weight?

LOL Randall.... It isn't that kind of fertilizer....  



It's 8-8-8 like we put on our corn early in the year...



I know you Cajuns are awash in rice, but it is rare to see 50# sacks of it up here.....



Though Shalt Not Archive



Tommy



 	  randy(at)rjhebertassoc.co wrote: 	
		  I LOVE IT

50# sacks of rice, wheat, flour.... but NOOOOOO fertilizer



That's great Tommy



Definitely

Do Not Archive



Randall J Hebert



Yes it is a part of Phase I testing.  We did it.  Used 50lb sacks of 

fertilizer and a couple of 25lb weights.  



80 degrees here today, 50's tonight



Do Not Archive

_________________
Tommy Walker
N25A - Anniston, AL

Dwight Early

Joined: 15 Jul 2008
Posts: 17
Location: Indiana

Posted: Mon Oct 06, 2008 4:32 pm Post subject: Re: Gross weight?

  I now am a 701 owner. Flew it over 200 miles home.

As it is, it will not carry 2 adults. propped wrong) short 300 rpm on take off and climb out. And uses fuel from the right tank not the left, found out if you want them to run even then turn one off until the other catches up. (just like a Cherokee) All in all awesome aircraft! Already got 5 hours in it.

Thanks for your commits.

_________________
Dwight Early
N701EF
Zenith CH701/Revmaster
Daleville, In

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Wed Oct 08, 2008 12:42 pm Post subject: Re: Gross weight?

Congrats on your purchase Dewight!

Please when you get things figured out, could you post some performance specs? We don't get a lot of solid info on non Rotax engines here. And I'm curious. 



Thanks loads and have fun!



Kevin

_________________
“Always do what you are afraid to do.”
R.W. Emerson (1803-1882)

"Real freedom is the sustained act of being an individual." WW - 2009

"Life is a good deal...it's worth it" Feb 1969
Dorothy McCune

jetboy

Joined: 22 Jul 2006
Posts: 233

Posted: Fri Oct 10, 2008 1:10 pm Post subject: Re: Gross weight?

I'll second that....info on your experiences welcome. FWIW I was short 2 - 300 rpm with my Jabiru prop for the first 200 hrs then I had a more suitable prop made. Now climbs at 3200 rpm on some days it can get over 3300. this prop is 64 x 30" wood looks similar to the Sensenich that is available in US. For the revmaster it might have to be a smaller dia. because of higher rpm. Every inch off the dia needs an extra 2" to the pitch for same engine load.



The prop change was the turning point in the development of the powerplant for me. Until that time I did not know if the engine was short due to wrong intake, carb or exhaust.



Ralph

_________________
Ralph - CH701 / 2200a

Tommy Walker

Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207

Posted: Fri Oct 10, 2008 1:15 pm Post subject: Re: Gross weight?

I will also be interested in your results with the RevMaster.  Keep us informed about temps, cruise, etc.



Tommy Walker in Alabama

N8701  91.5 Hours...



 	  Dwight Early wrote: 	
		    I now am a 701 owner. Flew it over 200 miles home.

As it is, it will not carry 2 adults. propped wrong) short 300 rpm on take off and climb out. And uses fuel from the right tank not the left, found out if you want them to run even then turn one off until the other catches up. (just like a Cherokee) All in all awesome aircraft! Already got 5 hours in it.

Thanks for your commits.

_________________
Tommy Walker
N25A - Anniston, AL

Dwight Early

Joined: 15 Jul 2008
Posts: 17
Location: Indiana

Posted: Fri Oct 10, 2008 2:56 pm Post subject: Re: Gross weight?

The prop is, I think 60 x 32 Prince P Tip. I haven't sent it back for rework. I am having to much fun flying it! It will get off the ground in about 300' and climb about 600 fpm, I know this is short of everyone else's performance.

 The exhaust Left is running 1285 deg. Right is 950 deg. Heads, left 290 deg and right is 180 deg. It is consuming 5 gals per hour and with the current prop cruise is 70 mph at 2800 rpm.

 I hope a pitch change will bring rpm's up 300 more which would be 3200

This is all I know about it right now. (It sure is a ton of fun to fly!)

The Revmaster is a great engine, I had one in a Sonerai. It is priced right also.

_________________
Dwight Early
N701EF
Zenith CH701/Revmaster
Daleville, In

mcjon77

Joined: 17 May 2008
Posts: 55
Location: Chicago

Posted: Tue Oct 14, 2008 5:09 am Post subject: Re: Gross weight?

That 75hp Revmaster is basiclly a 2180cc Type 1 VW, correct?  If so, you may want to look into getting a redrive from Valley Engineering or Great Plains Aviation Service (GPAS sells the Valley Engineering Redrive) for about $1500.  It will allow you to swing a much bigger prop and also increase your hp to 100-105hp.  Valley Engineering even sells a complete firewall forward package for the 701, although since you already have the engine you wont need it.

lrm(at)skyhawg.com
Guest

Posted: Tue Oct 14, 2008 5:47 am Post subject: Gross weight?

And, that will bump you about 20+ hp.  Of the two I like Valley's best, 

they use serpentine belts with a back side slack pulley.  It allows 

compensation for the power pulses.  A cog belt that GP uses is almost 

the same as having a direct drive, no give at all.  On the other hand 

the VW set at low compression doesn't have bad pulses anyway.   You 

could live with it, but why should you? 



Larry, N1345L



mcjon77 wrote:

 	  Quote: 	
		   



 That 75hp Revmaster is basiclly a 2180cc Type 1 VW, correct?  If so, you may want to look into getting a redrive from Valley Engineering or Great Plains Aviation Service (GPAS sells the Valley Engineering Redrive) for about $1500.  It will allow you to swing a much bigger prop and also increase your hp to 100-105hp.  Valley Engineering even sells a complete firewall forward package for the 701, although since you already have the engine you wont need it.





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 8697#208697





   

 ------------------------------------------------------------------------

 Checked by AVG - http://www.avg.com

Dan Stanton

Joined: 23 Sep 2008
Posts: 8

Posted: Wed Oct 15, 2008 4:12 am Post subject: Re: Gross weight?

Larry,

I just bought a drive system from GP and it had the serpentine type belts, not cog.

_________________
Dan Stanton
801 175 hrs.
701 95% done

lrm(at)skyhawg.com
Guest

Posted: Wed Oct 15, 2008 5:10 am Post subject: Gross weight?

They must have just changed.  The catalog I have shows cog.  Glad they 

did.  Larry



Dan Stanton wrote:

 	  Quote: 	
		   



 Larry,

 I just bought a drive system from GP and it had the serpentine type belts, not cog.



 --------

 Dan Stanton

 801 125 hrs.

 701 75% done





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 8864#208864





   

 ------------------------------------------------------------------------

 Checked by AVG - http://www.avg.com

mcjon77

Joined: 17 May 2008
Posts: 55
Location: Chicago

Posted: Fri Oct 17, 2008 2:16 pm Post subject: Re: Gross weight?

GPAS now sells the Valley Engineering Redrive, so whether you buy from GPAS or valley engineering you get the same redrive. Valley goes so far as to sell a complete firewall forward package.  I really like their redrive and have not found any bad words about it from folks that have flown behind it.



I wonder if one could use that redrive vw to power a 750, since it produces 100+ hp.

Dwight Early

Joined: 15 Jul 2008
Posts: 17
Location: Indiana

Posted: Mon Oct 20, 2008 5:13 pm Post subject: Re: Gross weight?

 After some checking with Revmaster, the Great  Plains and the Valley Engineering does not fit, because the Revmaster has a 4 bearing crank unlike the stock 3 bearing crank of the VW. The lower pulley would have to be designed different. Maybe Revmaster will come up with a Redrive.

_________________
Dwight Early
N701EF
Zenith CH701/Revmaster
Daleville, In

lrm(at)skyhawg.com
Guest

Posted: Mon Oct 20, 2008 5:36 pm Post subject: Gross weight?

You might want to consider a planetary re drive from Marvin Currie.   Of 

course you have to turn your engine around.  It bolts to the flywheel 

end.  I really like mine.  If you are interested, e-mail me and I will 

put you in contact.  It cost less too.  Larry, N1345L



Dwight Early wrote:

 	  Quote: 	
		   



 [Crying or Very sad] After some checking with Revmaster, the Great  Plains and the Valley Engineering does not fit, because the Revmaster has a 4 bearing crank unlike the stock 3 bearing crank of the VW. The lower pulley would have to be designed different. Maybe Revmaster will come up with a Redrive.



 --------

 Dwight Early

 Kitfox 1/532

 Zenith CH701/Revmaster

 Daleville, In





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 9580#209580





   

 ------------------------------------------------------------------------

 Checked by AVG - http://www.avg.com

Dwight Early

Joined: 15 Jul 2008
Posts: 17
Location: Indiana

Posted: Tue Oct 21, 2008 2:31 am Post subject: Re: Gross weight?

The Revmaster has a starter, dual mag and alternator on the flywheel end. I would hate to give up all them nice features. Thanks for the thought Larry.

_________________
Dwight Early
N701EF
Zenith CH701/Revmaster
Daleville, In

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