Activity Stream

Leni,

     I guess I spent too many years working in a prop shop - I think of props like the "real" ones - I know about model plane props, but not about Ivo blades - have never touched one - wouldn't the nickel edge be on the trailing edge if reversed?   Most "real" props have a cupped backside too.

Got me confused now!  Ha!

ED

nope, your still missing the mark on it Ed... he should be able to run a tractor prop on it with the prop flipped on the hub.. if he is turning the prop to the right in a normal install with his belt drive.. 

Kenneth, That is how I responded... and tower asked why not.. I told them it was not required to the best of my knowledge.. towers response.. would appreciate it if you had one anyways.. I went radio silent other than to confirm cleared to land... Had the feller not been douchebaggy with his line of questioning I would not have responded quite the way I did.  At any rate, I didnt get requested to go see the guys in the tower when I got tied down so I laughed it off.

There you go Joey - Your Dad don't need a new prop - Just a new redrive that turns opposite!!!

EDMO

sooo.. if its turning to the right in a tractor config, then it will be turning left in a pusher.  The rotax gear box prop is left hand.. Therefore, if you put a left hand TRACTOR prop on the subie in the pusher configuration with the front of the prop (same as mounted in the tractor configuration) pointed towards the front of the hover craft, wala, you have the tractor prop in the pusher installation.. Same thing Jim said, just laid out in a bit more detail.  It all comes down to the direction you are rotating the prop in the particular installation.  If it is belt drive, then the rotation will be the same as the engine.  Gear drive using 2 internal gears will reverse the prop or output rotation.  If you used a 3 gear system, it would put the prop back to spinning the same as the engine. 

I went through this on my electric RC planes using different gear boxes, some are 2 gear drive and driven external gears, some are 3 gear internal planetary drives.  It makes a difference and you have to reverse the wires in some cases to get the prop to turn the right direction.  in pusher installs I was able to use the gear drives and reverse the rotation on the prop to use a tractor prop in the pusher configuration.

Joey, we got ya confused yet

Oh yeh - I fergot about them Eggen feller geared redrives - I was referring to belt drives like, Stratus, Ram, Reductions, RFI, etc.  U R Kerrecty, Mr.

EDMO

If you're talking about the wing tanks on the catalina, I had the same concern, and drilled and tapped mine to a larger size- I'm thinking 3/8"  There's an aluminum plate buried in the fiberglass on my tanks (125AB) around the outlets,  which came as a relief.  I *carefully* drilled and tapped mine with NPT threads, which had NOT had any fuel yet..  I don't have a center tank.

Since you've fueled yours, I'd ventilate it for a while- maybe a LONG air hose running off a compressor at 5-10 PSI for a while..  before messing with anything like drilling/tapping/making sparks.

I *think* I sealed threads with permatex #2, build logs are alsewhere.  No leaks thus far.  I used the smallest  strainer I could get from AirCraft Spruce.  I also set up shutoffs for each of the tanks prior to the filters.  Had fuel running out of tanks too often in the MK IV when parked on uneven ground, or when folding wings.  I tested at 12 GPH on each tank, and run both open when flying.

I also sat in the plane, and installed fuel senders when I realized there was no way in heck I could ever see the fuel level on the left wing root through a "window".  I used the falcon capacitance senders and gauge.  I also modified the murle williams header tank with low-fuel warning, and installed it behind the third seat on the pilot side- I have a Hirth F30, which has a fuel return from the mikuni SBN carbs with built in pump and regulator (as well as an an-line facit, which helps prime and clear air), so needed a place to return fuel.  Warning light gives me ~10 minutes of time to panic..  as well as a quick reminder should I be so silly as to attempt a takeoff with both tanks off.  It also acts as a gascolator to catch water- which I thought usefull in a seaplane.

If you do set up dual shutoffs to tanks, I only close one valve to prevent cross-feed when parked.  To shut off both might create a pressure issue, depending on where you plumb in your vent line (mine has an on/off valve).

$.02

Jack

Austin TX

Catalina 125AB  Hirth F30  (27.5 hrs)

MK IV/Bandit  Jabiru 2200

Soob turns right - from the pilots seat - like all "real airplane engines". 

EDMO

...depending on the redrive.

I have my toy hauler camper and truck coming over if you need some "ground support".

Thanks Randy and Ed ,gives me some idea were to start, thats an awesome picture of the avid with the mountains as background

Soob turns right - from the pilots seat - like all "real airplane engines".  

EDMO

Tractor 2 stroke Rotax gear box prop is same as  belt drive Rotax 2 stroke pusher.  Both use a left hand prop. 912 Rotax turns in the opposite direction as the Rotax 2 stroke.  Not sure what direction the Suberu turns in.  My Culver prop is a left hand.  Jabiru tractor used a righthand prop, just like a Continental.   Jim Chuk

I can't completely commit yet, but I will as soon as I have a plane to fly up there! I supposed I could fly the Teenie up but I'd have to send myself a package with my camping gear, or go without changing clothes that week, which I'm pretty sure people wouldn't like!

We can start the roll call-- I will be there all week, Saturday through the following Sunday. I will be camping across the street from the ultralight red barn with my EAA chapter. My wife and I both volunteer at the ultralight area.

With a little luck, Joey(C5Engineer) will be joining me.

I get that question from towers that have radar capability all the time. I just respond, "negative transponder". I've never had them question it again.

if its spinning the right direction it works.. or it has in the past for me in other applications.  The issue is if your trying the spin the tractor prop in a reverse direction, then of course that wont work. 

Leni, the tractor prop cant be used as a pusher - it just don't work that way.  backwards, the leading edge becomes the trailing edge - unless they are symmetrical, and I don't know about the Ivo.

EDMO

Bushmaster!  The 12 ga. will take your whole strut or prop off!

EDMO

and this thread is WORTHLESS without pics!  I have been thinking of a hovercraft myself.. It would be the ticket for up at the lodge as long as I could lift 600-100 pounds.. how big of one is he building?

if he is spinning in the right direction, cant you just put a tractor prop on backwards?  it would be sorta pulling, not pushing, but it shouldnt matter if rotation is correct.

Randy,

      I would be a little cautious about the single sheet of aluminum sticking out of the flaperon because of possible flutter.  I would think that if you used 2 sheets, one on each side of trailing edge, and riveted together at their trailing edge, you would have a much stiffer setup.   I think you could go 100%.

      Have you thought about rechecking balance?  And maybe, reinforcing rib ends?

EDMO

Randy, I was flying into ENA the other day in my brothers pacer and the tower was hassling me cause I didnt have a transponder.. I was like .. :wth: I can fly into Lake hood, or Merril and not need one, but Kenai suddenly thinks they are ANC and wants to play with the big boys?  Must be something new cause they didnt ask me about it when I flew the 180 out of there this fall.

careful Randy.. someone is gonna question our manhood again if we keep talking about big tires   Of course, I would love said people to come play on the sands of the mac. river with 600s.  I will be the guy laughing and videoing the heli lifting their pile of rubbish off the sand bar.

Or watch them trying to land in the tundra with a tire that takes more than 2-3 PSI in it.  Its always fun to camp out and watch your buddy try to weld the fuse and put new gear under his plane while your out shooting animals and having a good time

hmmm.. I like where your going with this!  I can see roll forces getting heavier, but it could add some benefit too on the flaps.  I am still tinkering with the idea of splitting them so I can have flaps 40 and full aileron.  Not sure if I really need it though once I get the dadgum 800 in it.

Ahh, cool!  We used to do it with a mini 14.  If your in the rear, careful of the wing strut!  I know of more than one cub driver who heard the nasty bang bang bang ting as the gunner was watching the bullet hit the snow and trying to walk it in on the wolf with no regard to the location of the wing strut

Shooting out of the plane is fun, but it takes a bit to get it down.  Kind of like trying to hit a road sign with a beer bottle.. ya gotta get the lead dialed in!