spinner

[Dan Berry]

I am seeking advice.

I have a DuBro spinner and plastic props.
I am not having wonderful results getting the prop tight enough to make me happy without it slipping against the spinner backplate.
When I give it the last oompf it rotates enough that I cannot fit the cone over the prop.
Anyone have any slick solutions?
Switching to a supergalactic metal spinner isn't the cards yet.

[Howard Rush]

You might try a piece of sandpaper between the propeller and the spinner backplate.

For similar spinners I made it tool that is essentially an open-front spinner, such that you can tighten down the tool to hold the propeller in the right place, then tighten the propeller, then take the tool off and put the real spinner on in the same place.

[George Albo]

You might try a piece of sandpaper between the propeller and the spinner backplate.

For similar spinners I made it tool that is essentially an open-front spinner, such that you can tighten down the tool to hold the propeller in the right place, then tighten the propeller, then take the tool off and put the real spinner on in the same place.

That sounds cool. Can you upload a couple of pics of the tool?

[Motorman]

blank

[Dan Berry]

You might try a piece of sandpaper between the propeller and the spinner backplate.

For similar spinners I made it tool that is essentially an open-front spinner, such that you can tighten down the tool to hold the propeller in the right place, then tighten the propeller, then take the tool off and put the real spinner on in the same place.

It sounds like a kind of spanner that grabs the backplate. Is that accurate?

[RknRusty]

Great Planes makes some nice looking spinners with an aluminum backplate that grips much better. Their plastic is a harder type, and the colors are really rich. It's a little more fiddly to line up the screw holes, position the prop, etc.

They have a nice $16 buck aluminum spinner too. You'll need a Harry Higley adapter, description and link on the same page as the spinner.

http://stores.ebay.com/OmniModels/_i.html?_nkw=great+planes+spinner&submit=Search&_sid=139091328

Hope that helps.
Rusty

[RknRusty]

You might try a piece of sandpaper between the propeller and the spinner backplate.

For similar spinners I made it tool that is essentially an open-front spinner, such that you can tighten down the tool to hold the propeller in the right place, then tighten the propeller, then take the tool off and put the real spinner on in the same place.

That sounds interesting.
By the way, Howard, I put the manifold on the Yak today. I'll post pics of it in another thread. Looks pretty cool.
Rusty

[Mark Scarborough]

My guess is that Howard has basically what looks like a spinner cone with the nose cut off to access the prop nut,, I had a spinner similar to that on my bf 109 Sunter, but it was the flying prop, 109s had that stub nosed spinner for the cannon

[Howard Rush]

I had some Great Planes (I think) spinners and wanted a three-blade equivalent.  The backplate has six spokes, so I tapped all six for the 3mm screw.  Then I printed some three-blade spinners.  They were even more annoying about getting the prop positioned right than usual, because the prop fitted more snugly than usual.  The tool is a spinner that I stopped printing about halfway through the process.  I think you could just whack the front off a normal spinner. It would be something to do with the ones that you put the electric starter on when you forgot that the rubber cone was turned around.

[Tim Wescott]

For similar spinners I made it tool that is essentially an open-front spinner, such that you can tighten down the tool to hold the propeller in the right place, then tighten the propeller, then take the tool off and put the real spinner on in the same place.

Why didn't I think of that?  The Great Planes spinner is $9.95 -- that's not too much to pay for such a tool, especially when you get a spare backplate to boot.

[Dwayne]

Why didn't I think of that?  The Great Planes spinner is $9.95 -- that's not too much to pay for such a tool, especially when you get a spare backplate to boot.

This site needs a like button. 

[Target]

That DOES seem like a useful idea!

[Dan Berry]

Well, I don't have a printer. Don't have a ratted spinner. Hmmmmm.
First, I will try a sandpaper washer.
Then, ..... well, I'll try other suggestions.

[Target]

I have a OS.46LA that likes to knock the nut loose with the all-too-occasional backfire.
For my own sanity, it may be worth it to sacrifice a spinner.
Although marking the back plate with a pencil mark at the TE of the prop works wonders as well.

R,
Chris

[Tim Wescott]

Although marking the back plate with a pencil mark at the TE of the prop works wonders as well.

Wow.  Between you and Howard I'm feeling dumber and dumber!

[Target]

You're not dumb, and I'm not smart....
It is a second hand plane. It came with the spinner back plate pre-marked on the front.
See, this ARF P-40 has a nose ring, and when the previous owner installed 2* offset wedges, guess what??
That's right, the spinner needed more clearance to not rub the nose ring, so in went a non-knurled spacer disc.
Every time that .46 has a backfire (and with ME learning to flip my own engine, its pretty OFTEN, LOL), the prop nut comes loose.

Sooooo, I will soon be performing some rhinoplasty to the P40, and then install the proper RED spinner on there, and hopefully the back plate will have a bit more grip, and I will also start having a few less backfires.
Other than that, the 46LA runs great, and does the 4-2-4 run perfectly, and never burps in flight. Same upright and inverted, pulls well on the Xoar 11 x 5, etc, etc.

But, yes, the RED spinner back plate WILL be marked when installed!

R,
Chris

[Dan Berry]

I have a OS.46LA that likes to knock the nut loose with the all-too-occasional backfire.
For my own sanity, it may be worth it to sacrifice a spinner.
Although marking the back plate with a pencil mark at the TE of the prop works wonders as well.

R,
Chris

The DuBro spinner has two bosses that the prop must stay within. There are also two small......tits.....that are maybe supposed to keep the TE from wandering. They aren't up to the job if that's what they're their for.

[john e. holliday]

I too had a spinner that needed a spacer to get clearance on a plane.  Even stripped an adapter trying to get things to stay together.  I finally got fed up an JB Welded the extension to the thrust washer.  No more prop/spinner coming loose when the 46 decided to kick back once in a while.  Hard on finger though.

[RknRusty]

Well, I don't have a printer. Don't have a ratted spinner. Hmmmmm.
First, I will try a sandpaper washer.
Then, ..... well, I'll try other suggestions.

I was about to ask, who the heck doesn't have a ratted spinner. But now I know.

[Steve Helmick]

Nylon spinner backplates are NFG. Avoid them.  Steve

[Dan Berry]

I was about to ask, who the heck doesn't have a ratted spinner. But now I know.

Well, I have one but a different brand.
I'm pretty new to this variety of silliness. I don't have spinners on my FF planes.

[Scott Richlen]

For Chris Behm:

I have an LA-46 that loves to backfire!  Not sure what the deal is, there seem to be ones that like to back fire and then some of my flying buddies have LA-46s that rarely backfire (but when they do, it's usually at a contest!!)

Procedure: choke the engine with 4 snappy flips counter-clockwise, then flip it through another 5 times CCW.  Attach battery to glow-plug and then pull the prop through by hand clockwise to feel a bump.  Now, flip the prop clockwise and she starts right up.

Anytime that the battery is on the glowplug and the prop is pulled through counter-clockwise, she'll backfire and blow the prop loose.

[RknRusty]

My LA46(on a profile) bumps after two choke turns and floods with more. I too, have bumped a nut loose, I hate it when that happens Lol. And I never use a spinner at a contest. My prop wrench is always in my pocket with my backup glow igniter.

My LA likes to crank by being back-slapped. I'll do that if the first two flips don't start it, but they usually do. I wouldn't back-slap it with a wood prop though.
Rusty

[Target]

Thanks Scott and Rusty.
I'll check Scott's method, but my engine, like Rusty's, seems to like the back slap...
And I do it with a wooden prop.
I'm going to try Scott's method next time out for sure.

[Scott Richlen]

Remember that the number of chokes depend on the tank, fuel, etc. set-up, so they will vary: Rusty only chokes twice, I go 4 times.  But how many times you flip it  through after choking and before hooking up the battery makes a difference too.  Just keep varying these numbers until you get to a first (or second) flip start after attaching the battery and getting a bump.

You should see Carl  C start my engine.  He puts everyone to shame.

[Dan Berry]

Well, 220 sandpaper held through 3 flights.
We'll see how the next outing goes.
Thanks for all input!

[Carl Cisneros]

ROFLOL

Scott, it is so easy to start any motor like I do.

Told you how to do it ya know...........

Even started Johns (if I got his name right) at our contest like I normally start them and it had a CF prop on it.
He even warned me about the prop. Not a problem.

BUT, back on topic, one thing I do if my plane has any kind of spinner on it is to make sure the prop nut is good and tight before heading out to the
field for the day.
With wooden props, no matter what make, I have found that the nut Will tighten up a smidge before the flying session.
The wood DOES compress a smidge. And with the all plastic spinners, it is even more so for the nut be get tightened before flying.

I have had in the very past even had prop nuts come lose on  motors with metal spinner back plates, not just the all plastic ones.

Carl C

[Brett Buck]

Well, 220 sandpaper held through 3 flights.
We'll see how the next outing goes.
Thanks for all input!

    That's very odd. I have no problem with it kicking off, even when burping, and even on AAC super-motors. It may have happened once or twice in the last 25 years or so. David occasionally has his kick off on the PA75 when burping.

   I don't do anything special, just screw everything together. I use the steel Tru-Turn spinner nuts and a real wrench instead of a hobby shop "prop wrench", but I don't crank down on it inordinately. The plastic spinners usually work even better when tightening, the knurling on the thrust washer actually does something with the plastic.

    The only thing I can think is to make sure all the metal parts have some oil on them. Both the threads and the washer. That's one reason the aluminum spinner nuts strip out - they gall on the shaft if dry, that rips some metal off the threads, then after a few passes, it doesn't have enough left to keep from stripping out.

     Brett

[Randy Cuberly]

For Chris Behm:

I have an LA-46 that loves to backfire!  Not sure what the deal is, there seem to be ones that like to back fire and then some of my flying buddies have LA-46s that rarely backfire (but when they do, it's usually at a contest!!)

Procedure: choke the engine with 4 snappy flips counter-clockwise, then flip it through another 5 times CCW.  Attach battery to glow-plug and then pull the prop through by hand clockwise to feel a bump.  Now, flip the prop clockwise and she starts right up.

Anytime that the battery is on the glowplug and the prop is pulled through counter-clockwise, she'll backfire and blow the prop loose.

This is interesting to the point of being weird.  You do realize that when you flip the prop clockwise it backfires to start.  I guess the backfire in that direction tightens the nut instead of loosening it!  Probably should use left hand threads on cranks!   

Randy Cuberly

[Scott Richlen]

My best solution is to always have Carl C start my engines....

[Target]

I'm beginning to think that is the answer as well.
But, until he moves to SoCal, I'll just try to use his advice and that of others....

[Carl Cisneros]

Chris;

The closest I can get to you in LA is Barstow. 
That is unless I visit other family members down in South El Monte or South San Gabriel.

Carl C

[Target]

Chris;

The closest I can get to you in LA is Barstow. 
That is unless I visit other family members down in South El Monte or South San Gabriel.

Carl C

And you know this is very close to Whittier narrows, right?
Do it!

[Carl Cisneros]

Do you mean, Leg Lake where NAMBA clubs run their boats, and the Tether Car track, Control line circles and RC field is across
the freeway?

Nope, never heard of the place at all..................

/I just had to Chris.

Been there alot back in the 70's when I flew CL Speed and RC Pattern. Alot of good memories there.

Carl C

[Brett Buck]

This is interesting to the point of being weird.  You do realize that when you flip the prop clockwise it backfires to start.  I guess the backfire in that direction tightens the nut instead of loosening it!  Probably should use left hand threads on cranks!   

     Off-topic, but for the first time ever, this last weekend in Tucson, I got a backfire during burping (when it was 30-something degrees) and while my prop nut stayed on, it burned a hole in my nylons. I hadn't ever heard of that happening but I was staring right at it when it melted.

     Brett

[Dan Berry]

     Off-topic, but for the first time ever, this last weekend in Tucson, I got a backfire during burping (when it was 30-something degrees) and while my prop nut stayed on, it burned a hole in my nylons. I hadn't ever heard of that happening but I was staring right at it when it melted.

     Brett

uhhhhhhhh......
You wear nylons.........?

[Target]

Only on his venturi, right Brett?!

[Brett Buck]

uhhhhhhhh......
You wear nylons.........?

    The "nurse grade" nylon panty hose air filter/diffuser on the venturi.

     Brett

[Carl Cisneros]

OH, Venturi................................

We get it..........................

(bad Carl, bad Carl)

[Dan Berry]

Nurse grade?

[Brett Buck]

Nurse grade?

  Extra heavy duty!

    Brett

[Dan Berry]

Ouch!

[Carl Cisneros]

Brett;

STOP!!!!!!!!! 

We could REALLY get off topic on this one guy.

[RknRusty]

Lol, I had to take a momentary pause at it too. One of those, "Say What?" moments.
I've had a Thunder Tiger Pro .25 spit fire. And the same one one ingested its pantyhose once.

[Scott Richlen]

See what you'll be missing going electric?  No burping, no spitting, no cross-dressing.  How very boring!  It just won't be the same old Brett anymore....

[Carl Cisneros]

But if he does go electric, the only thing he will have to worry about is letting the magic smoke out
the batteries or ESC.  Try to put that out,,,,,,,,,,,,,,,,,,,,,,,,

Carl C

[Brett Buck]

It just won't be the same old Brett anymore....

    I think we have all gotten pretty tired of the original at this point.

      Brett

[Target]

    I think we have all gotten pretty tired of the original at this point.

      Brett

I'm not, I'm a newbie. I have stuff to learn.
I have a nurse friend though, and she doesn't wear pantyhose, HD or otherwise....I'll tackle that topic, you just keep sending info on design, trimming, and engine tuning.

My flying buddies don't necessarily agree with the 2-2-2 thing, they are more old school with the 4-2-4 arrangement, but I am smart enough to know that there are more than a couple effective ways to get the job done. So, I'm all ears.

R,
Chris

[Dave_Trible]

     Off-topic, but for the first time ever, this last weekend in Tucson, I got a backfire during burping (when it was 30-something degrees) and while my prop nut stayed on, it burned a hole in my nylons. I hadn't ever heard of that happening but I was staring right at it when it melted.

     Brett

Well me too..... I had that happen in Muncie a couple years ago.  Had to take a double take- it sure was a strange thing to watch!