Wes's Onex #89

[WesRagle]

Thanks Guys,

Very motivating to hear *real* airplane noises.

I took care of one more thing I have been putting off.



Pretty terrifying, but in reality not bad at all.

I cut two over-sized holes in a towel, clamped the lexan in place, medium speed and light pressure and voila. I polished the opening with 600 grit.

The most painful part was paying for the hole cutter :-)

Wes

[bvolcko38]

Where does that oil line go to coming from the oil pump cover?

[lgsievila]

Hi Wes,
If only you had known-

The most painful part was paying for the hole cutter :-)

I would have carried one down in my suitcase when I come down to your hood to visit my daughter for Thanksgiving.
See you soon my friend!

[WesRagle]

Hi Wes,
If only you had known-

The most painful part was paying for the hole cutter :-)

I would have carried one down in my suitcase when I come down to your hood to visit my daughter for Thanksgiving.
See you soon my friend!

Hey Loren,

Well, I didn't think of that :-) Looking forward to your visit.

Where does that oil line go to coming from the oil pump cover?

Hi Bill,

The line runs to the bottom of a firewall mounted oil cooler. Had I explained to Scott what my plans were, *before* he built the engine, I think I could have had a neater installation. However, I didn't think far enough ahead so I just gritted my teeth and made the necessary run. The air to the oil cooler will be supplied by a NACA vent on the cowl side. I'll use the exhaust of the oil cooler for cabin heat.

Preliminary firewall layout. It didn't end up this way but you can see how the oil cooler is mounted.



Oil cooler as mounted.



This pic shows the air supply for the oil cooler.



A similar setup worked well on the Sonex so I expect it to work well again. We'll see.

I wish one of the guys that live in the permafrost region, and is having trouble getting enough cabin heat in the winter, would give this a try. And, instead of blocking off part of the oil cooler in the winter, just plum in a heat muff ahead the oil cooler.

Different subject:

I think I have an interference problem with my induction system :-)

Seriously, I have a question: Do any of you guys have a good feel for how much the front of the engine moves around?

Thanks,

Wes

[Bryan Cotton]

Seriously, I have a question: Do any of you guys have a good feel for how much the front of the engine moves around?

I don't yet. I suspect I'll know by how much damage my baffles take while running.

[inventor]

Did you build the oil cooler or is it an off the shelf unit?

[WesRagle]

Did you build the oil cooler or is it an off the shelf unit?

Who's asking?

Ref. http://sonexbuilders.net/ucp.php?i=profile&mode=signature

Wes

[WesRagle]

Hi Guys,

I'm still moving along (at a glacial pace).

I covered and installed the glare shield and fuel vent. I may regret the covering the first time I spill fuel but I shall endeavor not to spill.



I also did some final trimming on the cowl. Since nobody would venture a guess as to the movement of the engine relative to the cowl, I made a guess. 1/4" top and sides and 1/3" on the bottom for a firm landing. I'll just have to keep an eye on it to see if that's adequate. I will attempt a jam seal (form the back) around the induction tube using a block of foam. If that doesn't work I'll come up with something else. Maybe try a more refined approach once the plane is flying and I need something to do.



I need to order fasteners. I prefer quarter turn fasteners. I'm thinking of these https://store.skybolt.com/phillips-sk28s3-series-c1207.aspx. Any advice appreciated.

BTW, UPS just delivered a sheet of 0.016. Now I have no excuse not to attack the baggage compartment.

Thanks,

Wes

[wlarson861]

When I changed engines and cowl I used the Skybolt fasteners. The adjustable receiver is worth the higher price. I have had to replace a couple of the cams. The locking pin fell out of two of them, one I found and re-staked it in the cam and it has held. suggest buying a couple extra along with a good supply of the retainer rings as they will pop off from time to time.

[WesRagle]

Hi Bill,

Thanks for the reply.

I have a couple of questions.

In a recent "Shop Talk" article Robbie Culver stated:

I used SkyBolt fasteners, which were not cheap but certainly are high-quality
quick removal fasteners for the cowling. I was slightly disappointed at the
supporting documentation for these, as installation instructions were a bit less
than expected. I figured it out, but not very quickly. There are specialized tools
required also, so anyone going this route please reach out to me for loaners.

That leaves me a little concerned.

Also, in the "Engine Swap" podcast Robbie said that his cowl spit out one of the fasteners in flight which he speculated was the cause of a ding he got in his prop.

Questions:

1) What are the specialized tools that are required for installation?
2) Which retainers should be used with the Phillips SK28S3 Series studs (ref: https://store.skybolt.com/retaining-rings-c1213.aspx)?
3) The thickness of the cowl haves is pretty uniform along the sides (where most of the fasteners go). So, what is the advantage of adjustable receivers?
4) When you say "the locking pin" are you referring to the pin in the end of the stud?

Thanks for Your Time,

Wes