DA 50 bog at high G's
#26
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RE: DA 50 bog at high G's
so i sent my engine to da today, they said 2 weeks.
anway, how many people out there auctually have this engine running right with the updates.... an no further mods?
anway, how many people out there auctually have this engine running right with the updates.... an no further mods?
#27
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RE: DA 50 bog at high G's
There were five DA 50 cc at the field the other day and all of them flew with no problems. Obviously mine was the best! I do run the extra line to the carb from inside the fuse.
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RE: DA 50 bog at high G's
I am a big fan of the AirBox, I think this is a Dick Hansen trick. See picture of my DA 50 on a DP Edge 540. I installed a pressure nipple on the carb plate and built a small balsa wood box from 1/16 contest balsa not sealed. Balsa acts as a fine air filter but will have very slow pressure changes. The pump diaphragm will see a constant pressure on the atmospheric side. My needles are not much different than the out of the box. After break-in I leaned both out. Inverted and knife edge, left or right I here no RPM change. In down lines the engine is solid. I have an older plane that uses a stock plate and I can hear the difference. This works much better than using a tube to a sealed fuselage which is hard to do with all the cutouts that a common in most ARF’s. My engine keeps getting better. I also think this keeps the engine from going lean. I have also run this engine at 97 degrees with out changing any settings. My DA will also idle at 1800 RPM and I have tested it inverted flat spin at 1800 RPM with out a hesitation to WOT and no dead sticks. I plan to use the AirBox set-up on all my engines.
I do fly at the same field as JoeAirport and I know his DA was not running perfect for whatever reason. His ZDZ runs great. I have seen more DA’s than any other engine and that is why I picked one up.
Joe’s ZDZ start-up procedure?????
I do have a problem with starting a gas engine at Full throttle and the choke 90% on. I have seen pilots make a mistake starting that way and have the engine fire up WOT because the pilot did not set the choke. I think any starting procedure that has full throttle is a dangerous. I have seen ZDZ’s start with only a few more flips than what my DA needs using the same procedure.
I do fly at the same field as JoeAirport and I know his DA was not running perfect for whatever reason. His ZDZ runs great. I have seen more DA’s than any other engine and that is why I picked one up.
Joe’s ZDZ start-up procedure?????
I do have a problem with starting a gas engine at Full throttle and the choke 90% on. I have seen pilots make a mistake starting that way and have the engine fire up WOT because the pilot did not set the choke. I think any starting procedure that has full throttle is a dangerous. I have seen ZDZ’s start with only a few more flips than what my DA needs using the same procedure.
#29
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RE: DA 50 bog at high G's
ORIGINAL: 3dsky
I do fly at the same field as JoeAirport and I know his DA was not running perfect for whatever reason. His ZDZ runs great. I have seen more DA’s than any other engine and that is why I picked one up.
Joe’s ZDZ start-up procedure?????
I do have a problem with starting a gas engine at Full throttle and the choke 90% on. I have seen pilots make a mistake starting that way and have the engine fire up WOT because the pilot did not set the choke. I think any starting procedure that has full throttle is a dangerous. I have seen ZDZ’s start with only a few more flips than what my DA needs using the same procedure.
I do fly at the same field as JoeAirport and I know his DA was not running perfect for whatever reason. His ZDZ runs great. I have seen more DA’s than any other engine and that is why I picked one up.
Joe’s ZDZ start-up procedure?????
I do have a problem with starting a gas engine at Full throttle and the choke 90% on. I have seen pilots make a mistake starting that way and have the engine fire up WOT because the pilot did not set the choke. I think any starting procedure that has full throttle is a dangerous. I have seen ZDZ’s start with only a few more flips than what my DA needs using the same procedure.
Well if you really want to go there many mistakes can be made during any engine start up. You gotta be carefull no matter what. There's no fully safe way to do anything with a gas engine except stay home and watch TV.
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RE: DA 50 bog at high G's
Very true, Joe...but Starting at full stick with ignition on and hope you have the choke open just right and only using a tail restraint on a lightly built plane on purpose could be a problem. If you have your needles set lean for the best 3D run you may have a hard time starting and I would have to agree that your ZDZ is running sweet and can see your point about crashing a plane over a dead stick when you are down low. If you are running that tight, I would then invest in a geared electric start unit and turn it over faster to get it running. This is a more common practice than your recommended Full throttle way. I would also try a C&H ignition unit, may have a stronger spark than the ZDZ unit???? I have an old Webra unit and it suffered from a weak spark. When hand flipping it was next to impossible to start it. I think everyone changed to C&H to get it to run right. Oh well this is off the subject and DA, ZDZ or XYZ ......gas should start easy and all are 3Dable.
#31
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RE: DA 50 bog at high G's
I actually don't start full throttle Tom. I prime WOT with the ignition off. You're making it sound worse than it is. I have it down where it starts very easy the first flip every time. Read my steps above and forget about the WOT part with the igniton on. What's your DA starting technique?
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RE: DA 50 bog at high G's
OK, on the last part.
I start everything the same way.
Full Choke = ¼ throttle (what would give about 2200 RPM) + ignition on and flip till I get a pop.
Open Choke reduce throttle flip about 4 time 6 max, running. (DA in 4 flips every time plus I have a servo on my Choke and if I am fast I can open the Choke when it pops and it will stay running)
If it has been sitting I will repeat the full choke step.
Works every time for me.
I start everything the same way.
Full Choke = ¼ throttle (what would give about 2200 RPM) + ignition on and flip till I get a pop.
Open Choke reduce throttle flip about 4 time 6 max, running. (DA in 4 flips every time plus I have a servo on my Choke and if I am fast I can open the Choke when it pops and it will stay running)
If it has been sitting I will repeat the full choke step.
Works every time for me.
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RE: DA 50 bog at high G's
ORIGINAL: Holton50
yeah i think my first step is im going to send my engine to da... after all the problems im having are the problems that the updates fix. ie... engine pretty much quits when i touch down for landing. dose anyone really know what updates they do exactly??? i think i heard something about the carb being flipped a 180. if thats the case, dose that mean i have to re engineer my throttle cause it would be on the other side of the carb now??
yeah i think my first step is im going to send my engine to da... after all the problems im having are the problems that the updates fix. ie... engine pretty much quits when i touch down for landing. dose anyone really know what updates they do exactly??? i think i heard something about the carb being flipped a 180. if thats the case, dose that mean i have to re engineer my throttle cause it would be on the other side of the carb now??
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RE: DA 50 bog at high G's
I have to admit I have never "yet" owned a ZDZ but I don't understand why every body has starting problems with any engine...... I choke with ignition ON, a tad above idle, flip until pop then take choke off and flip until it starts. There has never been an engine that "I" have owned that will not start this way.
I also have not had an engine that I can't make run in the air the same way as on the ground, might take a little work, but I have always been successful. Never owned a DA-50 though, wouldn't scare me away from buying one either.
Experiment, the magic box does work in some cases. I first came up with it on a stubborn 3W after talking with Bobby at Cactus Aviation. It was an easier solution than boxing the whole carb from air flow disturbances as he suggested. If you understand what and how things affect the running of an engine, it is easier to find a fix.
I also have not had an engine that I can't make run in the air the same way as on the ground, might take a little work, but I have always been successful. Never owned a DA-50 though, wouldn't scare me away from buying one either.
Experiment, the magic box does work in some cases. I first came up with it on a stubborn 3W after talking with Bobby at Cactus Aviation. It was an easier solution than boxing the whole carb from air flow disturbances as he suggested. If you understand what and how things affect the running of an engine, it is easier to find a fix.
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RE: DA 50 bog at high G's
I have 4 DA 50R. no problems with any of them. all have been to DA for the upgrades. totally abused one on a reduction drive and a solo prop by running at 12,400 for about 8 minutes. figured that it was trash for sure, but it was fine.
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RE: DA 50 bog at high G's
ZDZ but I don't understand why every body has starting problems with any engine...... I choke with ignition ON, a tad above idle, flip until pop then take choke off and flip until it starts
Definately something different between it and the other ZDZs
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RE: DA 50 bog at high G's
FOr what its worth when u have a problem with that chinese copy try and get service. NOw then MY DA 50 starts like a dream every time. PUll choke full on, turn ignition on, flip 3 times and it pops everytime, pull choke off starts on the 2nd flip everyyyyyy time. Whomever said that the chinese copy makes more power than the DA has never run a DA!! DL 50 Supremely superior ha. U get what u pay for. MEanwhile i flip and fly
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RE: DA 50 bog at high G's
ORIGINAL: Tennwalker41
FOr what its worth when u have a problem with that chinese copy try and get service. NOw then MY DA 50 starts like a dream every time. PUll choke full on, turn ignition on, flip 3 times and it pops everytime, pull choke off starts on the 2nd flip everyyyyyy time. Whomever said that the chinese copy makes more power than the DA has never run a DA!! DL 50 Supremely superior ha. U get what u pay for. MEanwhile i flip and fly
FOr what its worth when u have a problem with that chinese copy try and get service. NOw then MY DA 50 starts like a dream every time. PUll choke full on, turn ignition on, flip 3 times and it pops everytime, pull choke off starts on the 2nd flip everyyyyyy time. Whomever said that the chinese copy makes more power than the DA has never run a DA!! DL 50 Supremely superior ha. U get what u pay for. MEanwhile i flip and fly
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RE: DA 50 bog at high G's
Holton 50 was looking for help on making his engine run better. There are several things that can affect performance of a gasser. I would bet that the carb plate that was recommended would have at least changed his symptoms and it could be made from an aluminum soda can for zero cost. I have added this fix at the field on guys engines and most of the time you will see a big improvement. Last week I had to do this fix on a Fuji with a side carb. Took about 15 minutes and the low-end idle was smoother and the transition was better. I could have told him to buy a DA or the now better DL. So with a very simple fix the engine worked great and I recommended that when he got home to make the change to the Magic Box. Just try holding a stiff piece of paper over the carb plate and change the angle of the paper and the RPM will change. This small change on the ground will become worse it the air with or without a cowl. So my point would be don’t blame the manufacture for something they can’t control, your installation. Cowl cut outs, carb placement, carb cutout size in firewall, distance away from firewall, is the carb ingesting very hot air, is the air turbulent from cutouts, ………. only a few.
Just selling your DA installing a DL may not fix the problems with the installation.
Just selling your DA installing a DL may not fix the problems with the installation.
#40
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RE: DA 50 bog at high G's
yeah well im still waiting for my engine to come back from da... should be today to tomorrow. ill test these things out and let you guys know what happens.
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RE: DA 50 bog at high G's
ok so i just got my engine back form DA a few days ago. i flew i the engine and she runs phenomenal. no more sagging in knife edge, never sounds like it wants to quit. she just runs real strong. DA defiantly took care of me. The invoice says they replaced carb block, lost of gaskets,new piston, front and mid bearings, crank shaft... rod pin .. the list goes on. pretty much have a brand new engine and they didn't charge me a dime. real happy with the people at DA. the new DL may be cheaper... but common DL?? hah o well I'm in love with my DA
thanks for all the input--
thanks for all the input--