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  1. akflyer


    Hate to keep hounding you but I always thought that the Avid Catalina was the coolest homebuilt ou there. SHOW US SOMEE UPDATES

    Bob has been working on it damn near every day. I think he is still having computer issues though. I will make sure I get over there when I get back home and if nothing else take a bunch of pics and post for him.. I forgot to go over and work on his computer last time I was home.

    :BC:

  2. Av8r3400


    Me to.

    The tail skis are in production now. The testing I did was quite successful and the performance with the wheel through is pretty good.

    You will need to talk to Brett at Airdale if you want one.

    Unfortunately, our ski season is closing very quickly. 50° here today and the snow is melting very quickly. Last Saturday was my last ski flying day for this season. I've take my skis off.

    Next project is preping the plane for the trip to Sun 'N Fun!!! boobs.gif

  3. Trackwelder


    Hate to keep hounding you but I always thought that the Avid Catalina was the coolest homebuilt ou there. SHOW US SOMEE UPDATES

  4. akflyerbob


    Working on rebuilding the Avid Catalina, I have had to do

    the same conversion you are doing.

    Since the go kart breaks don't have a backing plate, I made them and welded them on.

    The biggest deal was moding the peddles from cables to master cylinders and moding the master clyinders to give more leverage.

    I bought the breaks from jackak from stuff he had left over, thanks to Jack for that.

  5. akflyerbob


    The alum, after all the holes are drilled weights very

    little but is still rigid. I rivited the panel and dash

    together and buffed it with 400 and warmed it a little

    and painted it with wrinkle spray can paint.

    I messed up a little, the wrinkle paint works well if the paint is put on thick, or wet. as painters call it, I

    didn't have it wet enough in spots so it couldn't wrinkle.

    But guess where most of the holes went.

    It also doesn't blind you in the sun.

  6. akflyerbob


    He bought that 670 from me. I shipped it to him and

    bought a 618 from him. I was thinking of using a 670

    but shipping every thing outside for machineing, and then

    it would still have single plug??

    I gave it up and sold the motor to Rick.

    He is great to deal with.

    Bob

  7. C5Engineer


    I got my Nanco 21X12X8's mounted today. These things are huge. Pretty lame for you Alaska guys but I'm pretty stoked. I can't wait to land off airport with my new brakes and these tires.

    The two of them side by side on the garage floor. That is my camera case on the one to try and show the size

    IMG_5685.jpg

    This one is of the original 20X7's that were on there like Larry is running. The 21's dwarf these even. I can't wait to see them next to my 8.00 that are on there now.I kept these since they were new if anybody needs a set...pay for shipping and you can have them.

    IMG_5682.jpg

    The new ones in the same spot.

    IMG_5683.jpg

    These puppies are wide!

    IMG_5684.jpg

  8. C5Engineer


    cool vid. The ole 912 sounds alot quieter than my 582.... now I cant wait to hear the 800 with a can on it... should sound about like a 185 on take off :lol:

    :BC:

    That's gonna be badass!! Did you end up ordering an engine?? I took this pic of a MKIV with a 583 that I almost bought a while back.

    exhaust.jpg

    I bet this thing was a hot dog with the 583. The guy I bought my Blue Head from is advertising a 670 right now with dual ignition and a blue head on it.

  9. akflyer


    I've never run "wot" straight and level because it (the tach) reads 8000 rpm on the climb out as soon as I get to 400 or so agl I back off to just under 6000 rpm indicated, God only knows what it's really turning. the egt's have never hit 1100 the cht's always under 300. plugs look good not hot and not fouled, changing/ re-gapping did not make any performance difference. I think the engine runs strong it's just I've been afraid of running it because of the tach readings. Static max fluctuates thus the reason I started the thread. I admit I'm a newbie to 2 stroke aircraft engines but I'm not a dumbass, i.e. I fly with both mags/ I monitor my egt cht readings,/ I even do a mag check during my run up. :nobashing: Realize I'm in phase 1 testing on this plane and it has 17 hrs, 8 of which I've put on it. With out a local resource to give me a what's normal I've just been trying to carefully test the characteristics of this experimental, the biggest hang-up has been the issue I started the thread about. I appreciate all the advice do you think there might be something else besides the tach that could be the problem?

    I re-read this and I come off testy, well I am at work and I haven't flown since dec.27. :(

    The tach is getting the signal off the stator..I would lean towards the normal issue of the needle tach just being fully screwed. Tiny Tach, or an optical tach on the prop and you do the math for engine RPM.

    :BC:

  10. racegunz


    What do you consider real nice? At wide open throttle, straight and level you should be getting 1150 or so.. anything under 1100 and your mains are too rich, or your over propped. What is your static max RPM? ( on the ground, run up) What do you turn on climb out? What do the plugs look like?

    I've never run "wot" straight and level because it (the tach) reads 8000 rpm on the climb out as soon as I get to 400 or so agl I back off to just under 6000 rpm indicated, God only knows what it's really turning. the egt's have never hit 1100 the cht's always under 300. plugs look good not hot and not fouled, changing/ re-gapping did not make any performance difference. I think the engine runs strong it's just I've been afraid of running it because of the tach readings. Static max fluctuates thus the reason I started the thread. I admit I'm a newbie to 2 stroke aircraft engines but I'm not a dumbass, i.e. I fly with both mags/ I monitor my egt cht readings,/ I even do a mag check during my run up. :nobashing: Realize I'm in phase 1 testing on this plane and it has 17 hrs, 8 of which I've put on it. With out a local resource to give me a what's normal I've just been trying to carefully test the characteristics of this experimental, the biggest hang-up has been the issue I started the thread about. I appreciate all the advice do you think there might be something else besides the tach that could be the problem?

    I re-read this and I come off testy, well I am at work and I haven't flown since dec.27. :(

  11. akflyer


    I always run both mags while flying! All the tests were static run ups, and you are right my egt's were real nice although I never really thought about that being a symptom, thanks for the tip. I wish I had found this site months ago!!

    What do you consider real nice? At wide open throttle, straight and level you should be getting 1150 or so.. anything under 1100 and your mains are too rich, or your over propped. What is your static max RPM? ( on the ground, run up) What do you turn on climb out? What do the plugs look like?

  12. C5Engineer


    When you order your Tiny Tach order it directly from them. There's a specific model for the two stroke. Lots of other places sell them but you want to make sure you get the right one or it won't work. They are the cheapest I found also. They also double as an hour meter when the engine is not running.

  13. racegunz


    Joey is all over this one.. You should be running both mags at all times except for the mag check before takeoff. The needle tachs are notorious for being way off. You can use the Tiny Tach and wrap it around one plug wire on each mag so it will show both sides during a mag check. Alot of guys were trying to figure out why the performance of the plane was so bad.. Like taking 700' to get off the ground and 400 FPM climb etc. Turns out that they were only running 5500 RPM or so on take off.

    What are your EGT's looking like. If you are over propped they will be reading low.

    :BC:

    I always run both mags while flying! All the tests were static run ups, and you are right my egt's were real nice although I never really thought about that being a symptom, thanks for the tip. I wish I had found this site months ago!!

  14. akflyer


    Yep sounds like you've been there, it is a needle type electronic VDO tach, if I change it I'll spend some bucks and get a MGL flight 2, the original intruments are used junk,(i'm not the original builder) it's time to get serious and make this thing right, and nice. Also I'm Looking at an Avid MKIV kit I hope to get it this spring!

    I plan on using You guys as a resource, I'll let you know about the tach when I get the new one installed. thanks.

    Joey is all over this one.. You should be running both mags at all times except for the mag check before takeoff. The needle tachs are notorious for being way off. You can use the Tiny Tach and wrap it around one plug wire on each mag so it will show both sides during a mag check. Alot of guys were trying to figure out why the performance of the plane was so bad.. Like taking 700' to get off the ground and 400 FPM climb etc. Turns out that they were only running 5500 RPM or so on take off.

    What are your EGT's looking like. If you are over propped they will be reading low.

    :BC:

  15. racegunz


    Yep sounds like you've been there, it is a needle type electronic VDO tach, if I change it I'll spend some bucks and get a MGL flight 2, the original intruments are used junk,(i'm not the original builder) it's time to get serious and make this thing right, and nice. Also I'm Looking at an Avid MKIV kit I hope to get it this spring!

    I plan on using You guys as a resource, I'll let you know about the tach when I get the new one installed. thanks.

  16. C5Engineer


    I stopped in to a field about 40 minutes away last Sunday to meet a guy rebuilding a KFI and a guy flying a Sky Raider. I saw he had a camera but didn't notice he was taking a ton of pictures. Here's a link to the folder where they are located.

    http://picasaweb.google.com/707mike/Avid_N279AF02#

    This one is my favorite

    crop1.jpg

    This was after my "zoom" maneuver after a 100mph fly-by. First shot I've seen where you can see the scallops in the air.

  17. C5Engineer


    What kind of Tach are you running??? Are you running a needle type tach off the grey wire in the wiring harness????? If so throw it in the trash and get a Tiny Tach http://www.tinytach.com/tinytach/index.php They are cheap and will give you an accurate reading. I'd about be willing to bet money that your NOT over revving your engine your tach just says it is. Everyone here has battled this issue. I was the last victim and almost landed off airport after I way overpitched my warpdrive prop trying to make my needle tach work right. My needle tach reads over 7000rpm when I'm really turning 6400 and it fluctuates when you do a mag check just like you describe.

  18. racegunz


    Hello all, I've read quite afew posts on here and thought I'd ask a question that no one has been able to really give me a good answer to. I have a rans s5 with a rotax 503 dcdi the tach looks like it is reading over revs from the engine, thus leading me to overpitch my prop, ect. The deal is if I run both mags the engine looks to over rev even with a fixed pitch Tenn. wood prop made for the 503.( they said no way it would over rev, same story with powerfin) If I run the left mag it still over revs (or it looks like it on the tach you really don't hear it over rev) Now comes the weird part if I run the right mag it looks normal at the high rpm range at idle it reads zero, literally, the tach starts to respond at about 2500-3000 rpm and then seems normal, then engine runs better with both mags though the rpm range and runs ok with either by themselves. if it's a bad connection (I've checked the tach itself) why only one mag? could the tach be bad? if so it sure is weird, I was leaning towards the left mag/CDI is creating dirty signals and screwing up the tach if so why does the other not read at idle? Any thoughts????

  19. akflyer


    This is the same "POH" I had. Just remember that this is for the model A or B and that our planes are a bit heavier and wont fly quite as slow or get off quite as fast. Still great performers, but not like the really light model A.

    Avid checklist?? CIGAR and GUMPS turn the fuel on and fly it.. on mine I have to check mixture and prop, other than that, make sure fuel is on, there is plenty of oil in the tank and fly the heck out of it! The only time I look at the Air Speed is when I am setting up to come in real short, then it is just feel as you dont have time to be looking at instruments. getting out short I glance to see 40 MPH indicated then pull full flaps and ease the stick back.. slowly bleed flaps till you have the climb established that you want.

    :BC: