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Cayuna 430 and Pterodactyl
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captainron1(at)cox.net
Guest

Posted: Sun Jun 21, 2009 7:37 am Post subject: Cayuna 430 and Pterodactyl

Can anyone give me the estimated or actual fuel burn with a Cuyuna 430, and the usual cruise speed for a Pterodactyl the one with the canard in front of it.



Same thing with a Rotax 440 and Eipper MX the single surface old vintage type?



Thanks

etzimm(at)gmail.com
Guest

Posted: Sun Jun 21, 2009 10:52 am Post subject: Cayuna 430 and Pterodactyl

2 gal per hr.  (at) 35 / 45 cruise, 55 mph vne.



  

On Jun 21, 2009, at 11:36 AM, Ron (at) KFHU wrote:



 	  Quote: 	
		   Can anyone give me the estimated or actual fuel burn with a Cuyuna  

 430, and the usual cruise speed for a Pterodactyl the one with the  

 canard in front of it.

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h20maule(at)hotmail.com
Guest

Posted: Sun Jun 21, 2009 12:23 pm Post subject: Cayuna 430 and Pterodactyl

I know a guy that had a pterodactyl on floats...flew it everywhere

 Daniel Myers 

 FSII Seaplane

 

[quote] From: etzimm(at)gmail.com

 To: kolb-list(at)matronics.com

 Subject: Re: Cayuna 430 and Pterodactyl

 Date: Sun C 21 Jun 2009 14:50:04 -0400

 

 2 gal per hr. (at) 35 / 45 cruise C 55 mph vne.

 

 

Microsoft brings you a new way to search the web. Try  Bing™ now   	  Quote: 	
		  [b]

captainron1(at)cox.net
Guest

Posted: Sun Jun 21, 2009 2:42 pm Post subject: Cayuna 430 and Pterodactyl

Thanks 

That's exactly what I need, and from the picture it looks like the bird I am flying has the bungee cords on the wrong end. I have no tach or any instruments yet. I'll be using my G-295 for everything else on a Ram Mount when I need to get somewhere.



==================================================

---- Eugene Zimmerman <etzimm(at)gmail.com> wrote: 



=============

2 gal per hr.  (at) 35 / 45 cruise, 55 mph vne.



  

--

kugelair.com

rowedenny

Joined: 09 Mar 2008
Posts: 338
Location: Western PA

Posted: Sun Jun 21, 2009 5:33 pm Post subject: Cayuna 430 and Pterodactyl

 	  Quote: 	
		   Can anyone give me the estimated or actual fuel burn with a Cuyuna 430, 

 and the usual cruise speed for a Pterodactyl the one with the canard in 

 front of it.



 Same thing with a Rotax 440 and Eipper MX the single surface old vintage 

 type?



 Thanks


	




Ron,

The Dac Ascender with the 430 Cuyuna burns 2 to 2.5 gph max, likes to cruise 

from 40 to 50 mph.  I sold my old Pterodactyl to a friend that still flies 

it with a J-bird supplied 440 Kawasaki and belt drive, he burns about 1.5 

gph at 55mph+ but he clipped three feet off each wing.

The MX will burn quite a bit more and go a lot slower.



Denny Rowe

captainron1(at)cox.net
Guest

Posted: Sun Jun 21, 2009 6:51 pm Post subject: Cayuna 430 and Pterodactyl

thanks

The one I have is basically a loaner. It was in pieces in a shop got it assembled and the Cuyuna fired up after some tugging on the cord. It must have been inop for about 5 years or more. Yesterday I test flew a Rotax 440 on an Eipper MX. What a racket it makes. I can fly on the Cuyuna at low power without ear plugs, not so with the Rotax. That alone is enough for me to favor the Cuyuna motor.



Any other advice for flying the duck?



==================================================



---- Denny Rowe <rowedenny(at)windstream.net> wrote: 



=============






 	  Quote: 	
		   Can anyone give me the estimated or actual fuel burn with a Cuyuna 430, 

 and the usual cruise speed for a Pterodactyl the one with the canard in 

 front of it.



 Same thing with a Rotax 440 and Eipper MX the single surface old vintage 

 type?



 Thanks


	




Ron,

The Dac Ascender with the 430 Cuyuna burns 2 to 2.5 gph max, likes to cruise 

from 40 to 50 mph.  I sold my old Pterodactyl to a friend that still flies 

it with a J-bird supplied 440 Kawasaki and belt drive, he burns about 1.5 

gph at 55mph+ but he clipped three feet off each wing.

The MX will burn quite a bit more and go a lot slower.



Denny Rowe 

--

kugelair.com

rowedenny

Joined: 09 Mar 2008
Posts: 338
Location: Western PA

Posted: Sun Jun 21, 2009 7:12 pm Post subject: Cayuna 430 and Pterodactyl

 	  Quote: 	
		   



 thanks

 The one I have is basically a loaner. It was in pieces in a shop got it 

 assembled and the Cuyuna fired up after some tugging on the cord. It must 

 have been inop for about 5 years or more. Yesterday I test flew a Rotax 

 440 on an Eipper MX. What a racket it makes. I can fly on the Cuyuna at 

 low power without ear plugs, not so with the Rotax. That alone is enough 

 for me to favor the Cuyuna motor.



 Any other advice for flying the duck?

It aint the engines, its the airframes, the Ascender is a very low drag bird 
	


compared to the MX.

Dacs are very pitch sensitive so don,t ham fist the stick, if you have the 

nose down, get off the power or you will overspeed it in a hurry!

Like someone else said, the VNE is 55, you will get there in a hurry with 

the nose down so beware.

PRACTICE IN NO CROSS WINDS they don't like cross winds.



Denny Rowe

capedavis(at)yahoo.com
Guest

Posted: Sun Jun 21, 2009 7:33 pm Post subject: Cayuna 430 and Pterodactyl

Is that noisy engine a 440 Kawsaki or a Rotax 447?   chris

   From: "Ron (at) KFHU" <captainron1(at)cox.net>

To: kolb-list(at)matronics.com

Sent: Sunday, June 21, 2009 10:28:26 PM

Subject: Re: Cayuna 430 and Pterodactyl

--> Kolb-List message posted by: "Ron  (at)  KFHU" <captainron1(at)cox.net (captainron1(at)cox.net)>

thanks

The one I have is basically a loaner. It was in pieces in a shop got it assembled and the Cuyuna fired up after some tugging on the cord. It must have been inop for about 5 years or more. Yesterday I test flew a Rotax 440 on an Eipper MX. What a racket it makes. I can fly on the Cuyuna at low power without ear plugs, not so with the Rotax. That alone is enough for me to favor the Cuyuna motor.

Any  other advice for flying the duck?

=========================

---- Denny Rowe <rowedenny(at)windstream.net (rowedenny(at)windstream.net)> wrote: 

=============

--> Kolb-List message posted by: "Denny Rowe" <rowedenny(at)windstream.net (rowedenny(at)windstream.net)>

 	  Quote: 	
		   Can anyone give me the estimated or actual fuel burn with a Cuyuna 430, 

 and the usual cruise speed for a Pterodactyl the one with the canard in 

 front of it.

 Same thing with a Rotax 440 and Eipper MX the single surface old vintage 

 type?

 Thanks

Ron,

The Dac Ascender with the 430 Cuyuna burns 2 to 2.5 gph max, likes to cruise 

from 40 to 50 mph.  I sold my old Pterodactyl to a friend that still flies 

it with a  J-bird supplied 440 Kawasaki and belt drive, he burns about 1.5 

gph at 55mph+ but he clipped three feet off each wing.

The MX will burn quite a bit more and go a lot slower.

Denny Rowe 

--

kugelair.com

         [quote][b]

captainron1(at)cox.net
Guest

Posted: Mon Jun 22, 2009 7:19 am Post subject: Cayuna 430 and Pterodactyl

Sorry that was a Rotax, 447 first time ever with one of them, I flew a buddy's 2 seater MX with a 582 (?) and it too was pretty loud, most likely its the muffler design, I would guess. Its okay with a helmet and ear plugs.





---- chris davis <capedavis(at)yahoo.com> wrote: 



=============

Is that noisy engine a 440 Kawsaki or a Rotax 447?Â Â  chris





________________________________

From: "Ron (at) KFHU" <captainron1(at)cox.net>

To: kolb-list(at)matronics.com

Sent: Sunday, June 21, 2009 10:28:26 PM

Subject: Re: Cayuna 430 and Pterodactyl






thanks

The one I have is basically a loaner. It was in pieces in a shop got it assembled and the Cuyuna fired up after some tugging on the cord. It must have been inop for about 5 years or more. Yesterday I test flew a Rotax 440 on an Eipper MX. What a racket it makes. I can fly on the Cuyuna at low power without ear plugs, not so with the Rotax. That alone is enough for me to favor the Cuyuna motor.



Any other advice for flying the duck?



=========================



---- Denny Rowe <rowedenny(at)windstream.net> wrote: 



=============






 	  Quote: 	
		   Can anyone give me the estimated or actual fuel burn with a Cuyuna 430, 

 and the usual cruise speed for a Pterodactyl the one with the canard in 

 front of it.



 Same thing with a Rotax 440 and Eipper MX the single surface old vintage 

 type?



 Thanks


	




Ron,

The Dac Ascender with the 430 Cuyuna burns 2 to 2.5 gph max, likes to cruise 

from 40 to 50 mph.Â  I sold my old Pterodactyl to a friend that still flies 

it with a J-bird supplied 440 Kawasaki and belt drive, he burns about 1.5 

gph at 55mph+ but he clipped three feet off each wing.

The MX will burn quite a bit more and go a lot sÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  -Matt Dralle, L========



--

kugelair.com

JetPilot

Joined: 10 Jan 2006
Posts: 1246

Posted: Mon Jun 22, 2009 11:26 am Post subject: Re: Cayuna 430 and Pterodactyl

 	  captainron1(at)cox.net wrote: 	
		   Yesterday I test flew a Rotax 440 on an Eipper MX. What a racket it makes. I can fly on the Cuyuna at low power without ear plugs, not so with the Rotax. That alone is enough for me to favor the Cuyuna motor.



Any other advice for flying the duck?



	




The Rotax 447 is a far Superior motor to the Cuyuna.  I like quiet motors, but I am not convinced that the cuyuna is quieter than the Rotax 447.  You tried a Rotax on a Qucksilver, a horrible and draggy airplane that takes a huge amount of power to keep it in the air.  It may be that the airplane and its installation has as much an impact on the noise as the motor itself.



Either way, I would not fly with an such unreliable and touchy motor as the Cuyuna , noise or not...  Not having in flight engine failures is far more important than noise, and I have my doubts as to weather this is even the case or not.



Mike

_________________
"NO FEAR" - If you have no fear you did not go as fast as you could have !!!

Kolb MK-III Xtra, 912-S

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Mon Jun 22, 2009 12:04 pm Post subject: Re: Cayuna 430 and Pterodactyl

 	  JetPilot wrote: 	
		   	  captainron1(at)cox.net wrote: 	
		  

	




The Rotax 447 is a far Superior motor to the Cuyuna.  I like quiet motors, but I am not convinced that the cuyuna is quieter than the Rotax 447.  You tried a Rotax on a Qucksilver, a horrible and draggy airplane that takes a huge amount of power to keep it in the air.  It may be that the airplane and its installation has as much an impact on the noise as the motor itself.



Either way, I would not fly with an such unreliable and touchy motor as the Cuyuna , noise or not...  Not having in flight engine failures is far more important than noise, and I have my doubts as to weather this is even the case or not.



Mike 	




One of the problems with the Cuyuna, according to a guy who's flown it a bunch, is the axial cooling. The cooling air for the rear cylinder goes through the fins of the front one first, making the rear cylinder tend to run hot. He said in continuous high power operation this could shorten the life of the rear cylinder quite a bit or even lead to overheating.



The Rotax aircooled motors of course don't suffer from this as they use well-designed shrouds that cool the cylinders more or less equally (ironically, it tends to be the PTO cylinder that runs cooler). 



The 447 is my other favorite 2-stroke besides the 503, as it's the simplest of the lot and still runs reliably (long as you wire it right like I didn't do one time). It's only problem is it tends to run hotter than the 503, being a suped-up 377 with not a whole lot of cooling fin area. But it can still do continuous high power..... just runs a little warm doing it up in the 350F range.....



LS

_________________
LS
Titan II SS

Possums

Joined: 03 Nov 2007
Posts: 247

Posted: Mon Jun 22, 2009 1:53 pm Post subject: Cayuna 430 and Pterodactyl

At 04:04 PM 6/22/2009, you wrote:

 	  Quote: 	
		  

One of the problems with the Cuyuna, according to a guy who's flown 

it a bunch, is the axial cooling. The cooling air for the rear 

cylinder goes through the fins of the front one first, making the 

rear cylinder tend to run hot. He said in continuous high power 

operation this could shorten the life of the rear cylinder quite a 

bit or even lead to overheating.


	


We used to cut  a couple of the fins off the front cylinder

to fix the problem.

_________________
Possum

captainron1(at)cox.net
Guest

Posted: Mon Jun 22, 2009 7:49 pm Post subject: Cayuna 430 and Pterodactyl

 

I have no idea, some of you guys spent way more time than me in those contraptions. So if you say a Rotax is preferable to a Cuyana  ( have you ever noticed how both of them have weird and unusual names) I go along with it. All I can say I gotta fly the contraption I have as its the only one readily available for the job. I wish I had some late model super gizmo with the latest things, but alas .....



======================================

---- JetPilot <orcabonita(at)hotmail.com> wrote: 



=============


captainron1(at)cox.net wrote:

 	  Quote: 	
		    Yesterday I test flew a Rotax 440 on an Eipper MX. What a racket it makes. I can fly on the Cuyuna at low power without ear plugs, not so with the Rotax. That alone is enough for me to favor the Cuyuna motor.

 

 Any other advice for flying the duck?

 

 


	




The Rotax 447 is a far Superior motor to the Cuyuna.  I like quiet motors, but I am not convinced that the cuyuna is quieter than the Rotax 447.  You tried a Rotax on a Qucksilver, a horrible and draggy airplane that takes a huge amount of power to keep it in the air.  It may be that the airplane and its installation has as much an impact on the noise as the motor itself.



Either way, I would not fly with an such unreliable and touchy motor as the Cuyuna , noise or not...  Not having in flight engine failures is far more important than noise, and I have my doubts as to weather this is even the case or not.



Mike



--------

&quot;NO FEAR&quot; -  If you have no fear you did not go as fast as you could have !!!



Kolb MK-III Xtra, 912-S





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p 49571#249571



--

kugelair.com

worrybear(at)verizon.net
Guest

Posted: Tue Jun 23, 2009 4:41 am Post subject: Cayuna 430 and Pterodactyl

---

Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Tue Jun 23, 2009 9:19 am Post subject: Cayuna 430 and Pterodactyl

At 03:26 PM 6/22/2009, JetPilot wrote:



 	  Quote: 	
		  The Rotax 447 is a far Superior motor to the Cuyuna.... I would not fly 

with an such unreliable and touchy motor as the Cuyuna...


	


Everybody puts down the Cuyuna, but I have yet to see anything other than 

anecdotal evidence that there's any significant difference in reliability 

compared to the Rotax.  Any 2-stroke engine needs proper care and 

attention, and the Cuyunas gained their bad reputation in the early days of 

ultralights when pilots raised on Continentals and others with no engine 

experience at all didn't take proper care of them.  If the 447 had been 

around at the same time I'll bet it would have had the same [bad] reputation.



-Dana



--

  Shotgun wedding: A case of wife or death.

captainron1(at)cox.net
Guest

Posted: Tue Jun 23, 2009 7:02 pm Post subject: Cayuna 430 and Pterodactyl

Well today I had the first real flight in the Cuyuana powered Duck got only about 15 miles from the strip I took off, when I had to put it down in a graded pre construction job site. No problems at all. But the engine did not act well. It look like there was bubbling right at the fuel filter. Maybe it has an air leak. got it trailed the rest of the way to my hanger, now I got a nice place to work on it but little time. We also found a length wise crack in the wood prop. Its a two blader prop 54 inch long and the hub thickness is 4cm, I tried measuring in inches but could not get a round number. Anyway I need a new prop ( like yesterday). It looks like a 2/1 reduction belt drive with a 4 bolt pattern and its counter clock turning.

If anyone has one of these laying around and wants to sell it FedEx overnight contact me offline.

Any ideas as to why the motor spattered when I advanced the prop to gull power would be appreciated. Would a fuel pump do that? air leak in the line, too rich a jetting?

It run okay kinda in mid power setting but when I gave it full power it did okay for a while and then started chocking. I got one day or so to get it straightened out.

Do we have any Kolbers in Tucson or the area that can fly a 60 mile track using GPS way points out of KFHU Thursday and Friday. You want to have some fun and make some money let me know. One way or another the job gotta be done.

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Tue Jun 23, 2009 7:45 pm Post subject: Re: Cayuna 430 and Pterodactyl

 	  Dana wrote: 	
		  

Everybody puts down the Cuyuna, but I have yet to see anything other than 

anecdotal evidence that there's any significant difference in reliability 

compared to the Rotax.  Any 2-stroke engine needs proper care and 

attention, and the Cuyunas gained their bad reputation in the early days of 

ultralights when pilots raised on Continentals and others with no engine 

experience at all didn't take proper care of them.  If the 447 had been 

around at the same time I'll bet it would have had the same [bad] reputation.



-Dana



--

  Shotgun wedding: A case of wife or death. 	




The early days of 2-strokes were really tough on their reputation. The engines themselves had their own problems, but the non-existent training/experience in their use by primarily 4-stroke drivers was far and away the biggest problem. 

At the time, they didn't know how to install em, prop em, jet em, fuel em and maintain em. It was nothing like the big iron in any of these respects for sure.



Virtually all my experience is with the Rotax aircooled motors so don't know much about the history of the Cuyuna. But the Rotax have gone through so many updates since their early introduction that I've lost count. The biggest ones have been improvements to the bottom end, particularly beefing up of the crank and its bearings especially at the PTO end, the provision 4 and then 8 crankcases for reliable mounting of the gearboxes, the move to CDI, and a bunch more smaller changes here and there.



The other significant enhancement is the field experience, now in the decades range, which tells us how to operate and maintain the motors. 

The jetting charts, breakin procedures, lots of folks around who knew the "gotchas" and there are a few here and there with all the Rotaxen.



That more than anything else has been the biggest improvement in the reliability of the 2-strokes, in addition to the improvements of the motors themselves of course.



All that said, the very early non-provision points Rotaxen did break cranks from time to time, mostly on the quicksilver which used a hard coupling shaft attached directly to the crank, making for a bit of a PR problem for Rotax. But by the time of the provision 8 motors and the wide usage of the gearbox, this became practically a thing of the past (except for the 582 which still is a bit weak in the crankshaft area).



Not to mention all the experience we have with them, that has virtually eliminated the 2-stroke troubles of the old days. But the bad rap lingers on, mostly from folks who don't much experience running them or 4-stroke drivers trying to use their old skills with them.



LS

_________________
LS
Titan II SS

Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Wed Jun 24, 2009 3:37 am Post subject: Cayuna 430 and Pterodactyl

Bubbling at the fuel filter:  It could be an air leak, especially if you 

use the screw type hose clamps which don't always seal all the way around 

small tubes.  Better to use safety wire.  A bit of bubbling when the engine 

is first started is normal, as any air and vapor in the line works its way 

through.  However, if there is any blockage upstream (happened to me on my 

first flight in the US, a bad primer bulb), the suction can cause  steady 

stream of bubbles as the fuel boils into vapor.



Re sputtering:  Not clear from your description.  Is it running OK at full 

throttle once it clears out, and do the plugs and EGT look OK?  If so, it's 

likely it's loading up at lower throttle settings, could be the needle clip 

(raise the clip to lower the needle and lean out the midrange) or idle 

adjustment screw.  The jettings listed in the Cuyuna manual (they give a 

chart of jet sizes according to altitude and temperature) are a good place 

to start.  Using fuel with ethanol may shift it slightly lean, so you may 

need to go one jet size larger.



If the crack in the prop isn't too bad, you can fix it.  Spread it slightly 

and squirt some wood glue (yellow carpenter's glue) into it... then balance 

it afterwards.  I've seen some amazing prop repairs in the PPG world; some 

of them go too far, I think, but they hold together.



-Dana

At 11:00 PM 6/23/2009, Ron  (at)  KFHU wrote:



 	  Quote: 	
		  Well today I had the first real flight in the Cuyuana powered Duck got 

only about 15 miles from the strip I took off, when I had to put it down 

in a graded pre construction job site. No problems at all. But the engine 

did not act well. It look like there was bubbling right at the fuel 

filter. Maybe it has an air leak. got it trailed the rest of the way to my 

hanger, now I got a nice place to work on it but little time. We also 

found a length wise crack in the wood prop. Its a two blader prop 54 inch 

long and the hub thickness is 4cm, I tried measuring in inches but could 

not get a round number. Anyway I need a new prop ( like yesterday). It 

looks like a 2/1 reduction belt drive with a 4 bolt pattern and its 

counter clock turning.

If anyone has one of these laying around and wants to sell it FedEx 

overnight contact me offline.

Any ideas as to why the motor spattered when I advanced the prop to gull 

power would be appreciated. Would a fuel pump do that? air leak in the 

line, too rich a jetting?

It run okay kinda in mid power setting but when I gave it full power it 

did okay for a while and then started chocking. I got one day or so to get 

it straightened out.


	


--

  A flying saucer results when a nudist spills his coffee.

captainron1(at)cox.net
Guest

Posted: Wed Jun 24, 2009 5:02 am Post subject: Cayuna 430 and Pterodactyl

I have the bulb above the fuel filter  ( the bulb is brand new from Aircraft Spruce, the original was rot cracked, plugs are also brand new), and we did not install it with hose clams at all. I have already taken care of that now. I have it installed Fuel Tank, filter, bulb, pump, I also have yet to run the motor to check and see if the problem is solved. All that stuff happened yesterday. The bubbles start right at the fuel filter  probably air was getting in that area, and also was another bubble stream was getting in around the bulb. I think this will be a none issue as I now have clamps there too.

-Sputtering; On take off it was good all the way to mid power, but no sooner I cleared the strip it started bogging down I brought the power back and it seemed to have gone away. But every time after that when I gave it opened throttle more to get some more altitude it started bogging down again. It got  to where I could not maintain altitude about half way to where I was going. I hope its just an air leak and nothing else, I am aware that I may have more than one issue here, no idea about the history of this motor, even though it is very strong when it is doing is thing at full throttle, for the few seconds that it does. 

I never opened a Bing carb before and don't have the manual can you tell me about the jetting in a bit more detail. Density Altitude around here is around 7-8K this time of year.

If I screw the idle in is that more gas or less? Can't tell by moving it sounds the same no matter what I do. I got it pretty far screwed in right now.

---- Dana Hague <d-m-hague(at)comcast.net> wrote: 



=============




Bubbling at the fuel filter:  It could be an air leak, especially if you 

use the screw type hose clamps which don't always seal all the way around 

small tubes.  Better to use safety wire.  A bit of bubbling when the engine 

is first started is normal, as any air and vapor in the line works its way 

through.  However, if there is any blockage upstream (happened to me on my 

first flight in the US, a bad primer bulb), the suction can cause  steady 

stream of bubbles as the fuel boils into vapor.



Re sputtering:  Not clear from your description.  Is it running OK at full 

throttle once it clears out, and do the plugs and EGT look OK?  If so, it's 

likely it's loading up at lower throttle settings, could be the needle clip 

(raise the clip to lower the needle and lean out the midrange) or idle 

adjustment screw.  The jettings listed in the Cuyuna manual (they give a 

chart of jet sizes according to altitude and temperature) are a good place 

to start.  Using fuel with ethanol may shift it slightly lean, so you may 

need to go one jet size larger.



If the crack in the prop isn't too bad, you can fix it.  Spread it slightly 

and squirt some wood glue (yellow carpenter's glue) into it... then balance 

it afterwards.  I've seen some amazing prop repairs in the PPG world; some 

of them go too far, I think, but they hold together.



-Dana

At 11:00 PM 6/23/2009, Ron  (at)  KFHU wrote:



 	  Quote: 	
		  Well today I had the first real flight in the Cuyuana powered Duck got 

only about 15 miles from the strip I took off, when I had to put it down 

in a graded pre construction job site. No problems at all. But the engine 

did not act well. It look like there was bubbling right at the fuel 

filter. Maybe it has an air leak. got it trailed the rest of the way to my 

hanger, now I got a nice place to work on it but little time. We also 

found a length wise crack in the wood prop. Its a two blader prop 54 inch 

long and the hub thickness is 4cm, I tried measuring in inches but could 

not get a round number. Anyway I need a new prop ( like yesterday). It 

looks like a 2/1 reduction belt drive with a 4 bolt pattern and its 

counter clock turning.

If anyone has one of these laying around and wants to sell it FedEx 

overnight contact me offline.

Any ideas as to why the motor spattered when I advanced the prop to gull 

power would be appreciated. Would a fuel pump do that? air leak in the 

line, too rich a jetting?

It run okay kinda in mid power setting but when I gave it full power it 

did okay for a while and then started chocking. I got one day or so to get 

it straightened out.


	


--

  A flying saucer results when a nudist spills his coffee.

--

kugelair.com

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Wed Jun 24, 2009 5:40 am Post subject: Cayuna 430 and Pterodactyl

> -Sputtering; On take off it was good all the way to mid power, but no 

sooner I cleared the strip it started bogging down I brought the power back 

and it seemed to have gone away. But every time after that when I gave it 

opened throttle more to get some more altitude it started bogging down 

again. It got  to where I could not maintain altitude about half way to 

where I was going. I hope its just an air leak and nothing else, I am aware 

that I may have more than one issue here, no idea about the history of this 

motor, even though it is very strong when it is doing is thing at full 

throttle, for the few seconds that it does.

Captain Ron:



Most folks do their engine testing on the ground, until they are satisfied 

the engine will perform normally once airborne.



If I have an engine problem, I tie the airplane to my trailer hitch with a 

secure tow strap.  A lot safer, saves a lot of time, airplanes and people 

doing it this way.



john h

mkIII

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

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