Precedent T180 Restoration

The bigger diameter will give more flywheel effect, useful for hand starting, the pitch is the distance in theory the prop will move forward in one revolution, personally I would try a 12x4 or 12x6, I'm not keen on loading engines up to much

I'd probably split the difference and go with a 12x5. I like the braking effect a lower pitch prop can give on a landing approach. Like Paul, I'm not keen on pitch over 6 inch.....

Thanks for the tips (again).

I thought I had to stick to the manufacturers recommended props.

I wasn't sure about going over 6 either. I ran a higher pitch on an electric one, once. It just raced around the sky too much.

That's what the throttle is for! Slow it down! :woohoo:

The higher pitches can stall at sea level, I think a 12x6 would be perfect. The 11x6 would work and give you plenty of revs but might be hard to get a decent idle on that size of motor.

Basically, pitch for speed and diameter for grunt/ thrust. The T180 is not a speed plane so a low pitch suits it best.
Make sure that you have ground clearance for the prop though.

Got a bunch of stuff delivered today. I found a place doing cowls for less than carbon copy, so I bought 2 (it's all they had in stock).

I should hopefully get the covering tomorrow, although it was meant to be today. Then I can get on with putting it all together.

I bought some fuel proofing paint and painted the interior and all of the front end with it. The firewall and surrounding were already pretty well fuel proofed with epoxy, so I left that in place and just coated it.



While I was waiting on the postman, I finished repairing a flitetest simple scout that I started in 2020, that got damaged in the house move.

I'm getting close to mounting the engine. So it's raised some questions.

The previous mount had holes drilled, but it was too narrow, so I've ordered one that fits.

Is it a safe bet to drill the holes on the new mount in the same position as the old one?

Or is there a way to work out the engine position? I'm assuming the original build instructions would have had some guide for it.

Presume you mean fore and aft? If so then no as chances are your engine will be longer, best to mock it all up ( cowl, prop, spinner and engine) first.

Hmm, ok, thanks. I wanted to mount the engine at 90deg, so it'll be a problem getting the engine to stay in place without bolting it on. Also, the cowl needs a hole for the cylinder head, so I don't want to cut it without the engine being in the right position.

Rotate the fuselage 90', so the motor will stand on the mounts!
Put the motor upside down on the mount, if it will fit - so the cylinder is between the arms - that gives you a clear access for drilling the bolt-holes.
Drill ONE hole, bolt the motor on, check it is square on the mount, and the right distance - then drill the other holes.
Put the motor the right way up and bolt it on, then make a card (corn-flakes box?) mock-up of the cowl, to get the holes in the right places.

Make the cowl hole a lot smaller than that required, and check it is in the right place! Then you can 'ease' it sideways a bit if needed, before opening it up.

Consider how you are going to get at the carby in case it needs adjusting.
Will the cowl fit when the motor is in place?
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Or go electric, and save all this hassle! [badass]

I'm guessing 2^o down thrust and 2^o right thrust which means the rear of the engine mount will have to be offset to get the spinner in the centre!

I got the covering I was waiting on, so started it tonight.

I did the bottom fine, but I didn’t think about the side enough. I want the top half to be white, so started with the blue bottom half. However I now realise I should have done white down the side to cover the hole, then blue on top of that.

Oh well, live and learn. I should be able to get the blue off and try again.

As you appear to be using 'solid' colours, the white will cover the blue.
Try it with a scrap bit, to save wasting expensive heat-shirink.

I thought of that, but the blue shows through the white.

I’m going to plan it a bit better before I try again. I might make a template from card first.