The prop jig is fine and useful for drilling the holes in the prop, and typically that's fine for a single bolt spinner set up where the spinner can sit anywhere, but it doesn't align the prop to the prepositioned perimeter holes in the spinner's back plate.

First CA the snot out of the holes in your prop second but a dab of Blue locktite on the prop bolts if it is a new prop check the bolts tightness after the first couple of flights and retighten as needed, problem solved , the problem is that your props wood is compressing thus the bolts loosen, follow these very simple instructions and once the set up is broken in your problems will be over until you perhaps break the prop then it begins again , harden the prop holes with ca and then retighten the bolts after the first couple of flights and it will stop and become very much dependable, there is no need to convert to a single prop bolt when you tighten a metal mechanical fitting against a soft wood surface it will compress against the load unless it is hardened with CA to stop the woods compression against that load, if you harden the prop holes it will only compress to a certain point then stop just like how a motorcycle chain will stretch under load to working tolerance and then stop. just my .02 but it works 3 plus years on the same prop and no failures to date ya gotta look at it as if what kind of scrutiny would I give it if my ass was sitting in it.

Maybe i am missing something... wouldn't be the first time. Once the first bolt is through the prop, through the spinner backplate and started into the engine hub all the others should be lined up.

change out the bolts thay look like grade 8 but thay are not broke all on my dle 111

Yeah, I think you missed the issue I'm describing, or I'm not explaining it right,

see picture of the spinner type the OP is referring to.
http://www.gabahobby.com/produto/e0c...625bacf0_2.jpg

Each prop must be drilled to aligned with the spinner slots and the back plate at the same time so it fits the slots. The only way to do that is how I described earlier or make a jig that will drill each prop to match the spinner back plate. The OEM drill jig in itself doesn't achieve that, those just align the 4 or 6 holes.

I still don't see the issue.

You jig drill the spinner backplate with the same drill jig as the prop, or drill a prop with the jig then drill the spinner backplate. You only have to drill the spinner once unless you dork it.

I mean, they aren't like the plastic spinners with alignment tabs, as long as you have four holes it should work.

"WHAT WE HAVE HERE-IS A FAILURE TO COMMUNICATE" I just love that line

How about I REDIRECT everyone
like I ask BEFORE
if you dont have a DLE that has the adapter
DONT offer suggestions on how to fix something you know nothing about

its like taking your porshe to the repair shop and thes guys who work on boats start telling you how to fix it

If you dont got one just read and keep your non informed suggestions to yourself

Scaleonly they dont have one-they dont understand

I think the OP will get it, that's all that really matters.

Andy,
It's exactly like a plastic spinner's alignment pegs,, but it's the screws that hold the spinner to the back plate instead

Well ...I, for one, understand what you all are saying. Once you establish the relationship between the multi-hole prop bolt pattern and the location of where the prop blades exit the spinner, you must maintain that pattern/relationship or you will not be able to put the spinner back on and have the prop blades center in the cutout openings in the spinner. If you drill the bolt pattern in the prop off location the spinner will not fit. You MUST maintain the bolt pattern relationship between the engine,prop,and spinner.

That is a no brainer. [8D]

"What we have here is those that gets it....and those that don't!"

But he is not looking to get rid of the adapter it don`t seem, he want to keep using a single bolt. So all the talk of drilling holes is useless. Stick to the subject, he says.

Hope non of you guys are full scale pilots, you all drifted way off course with the drilling holes in spinner talk. If you all were on a flight from NY to ATL looks like some of you ending up in LA....LOL.

And your posts do absolutely nothing to help when using a DLE55 and the spinner the OP mentions being the root off him choosing to use the single bolt adaptor. At least I offered a solution to the OP's problem of broken bolts.

The OP is free to choose which suggestions will serve him best

Criticizing those who offer help is unhelpful

Scale Only 4 Me,
You are absolutely correct.

Speedy-G

Your all wrong here is the only way to setup a DLE 55cc

Best post yet!

I understand what you are saying... you are using the adapter... we are all saying ditch the adapter and use the engine as designed. That is the solution. The one bolt prop system is allowing the prop to work the adapter loose causing a failure.

If your back plate has some sort of alignment issues, I would change to a different spinner also. It is crazy to need four attachment points to secure a spinner.

Good luck.

scale only 4 me, thank you for the link, now i understand. Based on another what i feel is a very arrogant post and some unneccesary comments, i am out of this thread. Good luck.

Hey could you keep us up to date on that on board start, was looking at that the other day. Is there a thread on it ?

In the past, Iv'e had a DL50 and a DLE30 with these adapters. The main reason I converted was because I had multi bolt props shear off on the ground and in the air! To SAFELY install multi bolt hubs is to have a torque screwdriver so all the bolts are the same torque. The adapter MUST fit absolutly flush to the engine hub, no tiny burs, etc., then the screws need to be a higher quality and red loctited in with a good inch pound torque wrench. There is really no need for all these holes drilled in the prop hubs, it just weakens the center of the prop. If a single bolt hub comes loose the prop just spins free but the whole thing doesn't nessisarily come off. The BME 110 extreme used a single bolt hub with no problems.

Mark.

The fact is that they are informed suggestions. These guys including myself have years for experience with gas engines. Myself 15 years of running everything from 24 cc to 170 cc. I don't think I need to have owned an Edsel to know it was junk. Most of us have already figured out that a single bolt conversion is going to fail. There is simply too much stress being focused on a small area. I feel the intent is a good one, no need to drill props or spinners and these items can still be used on a number of different engines. IMOit just isn't going to happen, for safety's sake go back to the 4 bolt hub. Everything will run straiter and you will not have any reliability and more importantly safety issues.