Zu-DSR's Engine problems (was ZU-DSR first engen out)
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Bennie Vorster
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justin.schoeman
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Quentin Ferreira
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Jou B-Baby
Hi Bennie !!
EN hoe het dit toe gegeaan???
Of gaan jy in die week op???
Jy kan seker nie meer wag nie
Quentin Ferreira
ZU-ATP
Newcastle
EN hoe het dit toe gegeaan???
Of gaan jy in die week op???
Jy kan seker nie meer wag nie
Quentin Ferreira
ZU-ATP
Newcastle
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Barnstormer
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Bennie Vorster
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Well what can I say? 
ETG = 680 degrees
CHT = 230 degrees
RPM = 4300
idel RPM = 1000
Rate of climb 400ft p/m with two up and full tanks.
I don't know if the VW motor will like to keep performing for a long time 4000 rpm cruise or will this cook the motor. Should it perhaps run on a bit lower rev's.
I am thinking of fitting a 72/55 pitch prop in stead of a 72/50 pitch that I have fitted on the moment to bring down the rpm.
Another option is to play with the reduction drive pullies to bring the rpm down a bit but I'm scared the prop might start cavitating at full throttle.
Though some guys suggests that there is no problem for the VW to cruise at 4000 rpm.
Help I am a little confused now. 
Other than that I am as happy as can be. I should do my license during the school holidays in two weeks time.
Last edited by Bennie Vorster on Tue Jun 19, 2007 4:06 pm, edited 1 time in total.
Growing old is far more dangerous than flying !!!
Bennie Vorster
083 277 5110
Bennie Vorster
083 277 5110
Well done. Hope you have many hours of hassle free fun. I have only been flying a VW engine for 6 months and I limit the CHT to 210 deg and max cruise at 3500 rpm. Perhaps a slightly courser prop will do the trick. I, like some others believe that the less the engine has to turn the longer it will last. Good luck.
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John Young
- The Boss
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You attached the wrong photo
Huge congrats Bennie. Been watching your endeavours to get airborne with interest.Bennie Vorster wrote:Rate of climb 400ft p/s with two up and full tanks.
But, with a climb rate of 400ft p/s, you attached the wrong photo.
Well done & regards
John ZU-CIB
- Attachments
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- With a climb rate of 400ft p/s, you attached the wrong photo.
- catoeurofighter.jpg (28.84 KiB) Viewed 3967 times
Bennie
remember when you increase the pitch to reduce the static RPM and cruise RPM you also reduce the rate of climb. You don't want to end up with a climb rate of 150 to 200fpm on a good day because on a high temp day with density altitude coming in to play you will struggle to get off the ground.
Maybe the Cubby pilots can give us an indication of the RPM they cruise at. They use the VW motor a lot.
remember when you increase the pitch to reduce the static RPM and cruise RPM you also reduce the rate of climb. You don't want to end up with a climb rate of 150 to 200fpm on a good day because on a high temp day with density altitude coming in to play you will struggle to get off the ground.
Maybe the Cubby pilots can give us an indication of the RPM they cruise at. They use the VW motor a lot.
Greg Perkins
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Bennie Vorster
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Barnstormer
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Neeeee, met grysheid kom net NOG grysheid. Wysheid kom deur ondervinding. Bennie, daai Volla moutertjies wil nie lank op die grond staan en idle nie. maak dat jy in die lug kom, dat die ding kan wind kry. Los die prop soos hy is. Die Volla enjin se woema sit in die RPM. as jy hom stadiger probeer draai sit hy minder krag uit. 4300 is omtrent reg. Los hom so, hou nou op vroetel aan die bleddie ding en LEER VLIEG 
Ek hou jou vordering met groot belangstelling dop, en hou vir jou duim vas. Geniet, en veilig vlieg. :D
Glad to see your BB flying Bennie, I second what Boet says, don't change the prop.
If I were you I would try to build up about 20-30 hours flying where you could emergency land at any time. During that time you will be checking your engine's reliability and learning all about it and the aerie.
After that time you will have more confidence in the engine and know it's operating temp and pressure ranges well.
Then do a nice Xcountry over the mountains and come visit us in the Lowveldt!
If I were you I would try to build up about 20-30 hours flying where you could emergency land at any time. During that time you will be checking your engine's reliability and learning all about it and the aerie.
After that time you will have more confidence in the engine and know it's operating temp and pressure ranges well.
Then do a nice Xcountry over the mountains and come visit us in the Lowveldt!
Nottaquitta
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Bennie Vorster
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Quentin Ferreira
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ENGIN
HI BENNIE
Moet se die engin klink baie mooi......het vanogend bietjie gekyk met die flyby........Lyk en klink stunning!!! So verkoop hom nou aan my......
Quentin Ferreira
ZU-ATP
Newcastle
Moet se die engin klink baie mooi......het vanogend bietjie gekyk met die flyby........Lyk en klink stunning!!! So verkoop hom nou aan my......
Quentin Ferreira
ZU-ATP
Newcastle
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