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Infinity 90 Build

How good is it ?

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Peter Jenkins27/01/2019 19:30:09
1193 forum posts
132 photos
Would have been better if they had left then undrilled. Mind you, drilling the holes in the right place ain't a piece of cake either.
Bruce Collinson27/01/2019 19:46:52
337 forum posts

My legs needed one hole enlarging. I can readily foresee the current (I strongly suspect generic) two piece legs being swapped for a one piece composite u/c. There are already cracks in the paint on both faces. Had same issue with the Seagull Yak, and I didn’t even land it!

I begin to wonder whether there might be a market for these ARTFs without any hardware, with a proportionate cost reduction, so the builder could specify and fit it to his own specification.

BTC

cymaz28/01/2019 19:32:45
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8439 forum posts
1160 photos

I think that is a good idea.

Put the DLE 20ra on the test stand today. Will check the timing tonight and, hopefully, get it going tomorrow

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Bruce Collinson28/01/2019 19:43:06
337 forum posts

Ooh err .... timing? You’re clearly writing from past experience but that wasn’t an issue with mine, once the jets were reset from fully closed. Might save time.

Checking to see if Jeremy Harmer’s flew today, second attempt. Would have been fitting filter and rx had the present Mrs. C. not blocked the washing machine drain filter...again..............................😫

cymaz28/01/2019 21:38:44
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8439 forum posts
1160 photos

Could you tell me his carb settings please. Is it ,H 1 1/2, L 1 1/4?.

Bruce Collinson28/01/2019 21:41:55
337 forum posts

His is glow. My DLE if I recall started out at 2 turns each then closed in progressively. The Chinese copy Walbros don’t seem to be very consistent, but the out of the box settings were a mile out.

Sorry.

Washer unblocked.

cymaz29/01/2019 18:06:31
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8439 forum posts
1160 photos

Finally......Finally....on this build something that works straight out of the box party

 

 

HERE

Edited By cymaz on 29/01/2019 18:08:00

Bruce Collinson29/01/2019 19:08:19
337 forum posts

That must be a relief and satisfying in equal measure; well done. Your identity is out of the bag now. How were the jets?

B

cymaz29/01/2019 19:17:16
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8439 forum posts
1160 photos

I screwed the both all the way in and then turned them out. There is a bit of a write up on the video,

cymaz02/02/2019 19:30:09
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8439 forum posts
1160 photos

Spent as long as I could in an unheated garage. Did the final fix of the engine, ignition, pipework and tank. I’ve been advised that using closed loop for the elevators is not going to get the best of aerobatics. So I’ve bit the bullet and bought 2 of these, one for each half. They will be driven using the Futaba 9c Ailevator mix. I will use M3 linkage..

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Peter Jenkins02/02/2019 20:18:22
1193 forum posts
132 photos
Cymaz, I would have to disagree with the advice about closed loop elevator not being good for aerobatics. The Capiche 140 was a highly successful 3D and precision aerobatic machine and had closed loop elevators. Never fear, 2 mini servos are just as good and a lot easier to set up not having to cope with 6 closed loop wires.
cymaz02/02/2019 20:31:53
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8439 forum posts
1160 photos

I did the ailevator set up on the Dragon Lady ReFurb. It’s a doddle to do and works well. It will offer some redundancy on a vital surface. I can still use the elevator crank somewhere else.

cymaz02/02/2019 20:31:56
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8439 forum posts
1160 photos

I did the ailevator set up on the Dragon Lady ReFurb. It’s a doddle to do and works well. It will offer some redundancy on a vital surface. I can still use the elevator crank somewhere else.

Oops...blog burp

Edited By cymaz on 02/02/2019 20:34:26

cymaz04/02/2019 06:38:03
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8439 forum posts
1160 photos

party

 

Sunday morning, Mrs Cymaz hard at work, cats asleep, all the housework done. I set about doing the cowl. As in previous posts the engine bay continues to be an utter pita. I had to make a special length Allen key to tighten the exhaust bolts. Added litho plate to one side of the bay to protect the timing wires from exhaust heat. Various cardboard templates used to get the general shape of the baffling...more work to do but we are getting there. The baffles in the picture are of thin beer can to get the curve, this will be beefed up a bit as it’s paper thin and might bend. Out of the way of the incoming air flow.

Engine bay..

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Cowl..

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Inner cowl

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Cowl front...

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Also servos and Rx coming today from Steve Webb Models

Edited By cymaz on 04/02/2019 06:40:53

Bob Cotsford04/02/2019 09:38:20
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7788 forum posts
432 photos

You will of course be dressing back that cutout in the f/g cowl leaving nicely radiused corners won't you?wink It's looking neat now but yes, what a royal PITA to get there! Shoulda gone electric cheeky

Bruce Collinson04/02/2019 10:56:46
337 forum posts

Or, as I observed to Jeremy H only last week, It's probably in its bracket and reasonably straightforward for a YS pumped engine, around which it seems to me the whole of the front end had been designed, but for his ASP or my Laser 100 it needs lots of alterations. Ditto a DLE petroly, although at least the tank stays put.

I can afford neither the fuel bills nor the depreciation of YS, let alone the price.

Radio going in mine. Close run thing whose flies first ...

BTW Peter how's the rear elevator linkage access hatch secured on yours?

BTC

cymaz04/02/2019 17:20:51
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8439 forum posts
1160 photos

FYI Bruce et al...

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cymaz05/02/2019 20:19:12
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8439 forum posts
1160 photos

In the absence of Mrs Cymaz( at work again!!) , installed the elevator servos and bound the new receiver.

These Savox SH-1350s are a real work of art....

 

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Edited By cymaz on 05/02/2019 20:20:01

Bruce Collinson06/02/2019 21:38:23
337 forum posts

Are will still at 147 mm c of g as per the wrong manual? Battery going in mine and would like it somewhere near before I relocate to the unheated man cave and recommission the Valerie...Victoria...what’s the name of that bird?

Fed up with this weather, haven’t flown for a fortnight. There might have to be some retail therapy instead...

BTC

cymaz06/02/2019 22:11:24
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8439 forum posts
1160 photos

Got the elevator leads all finished and the Rx in. The new U/C is now leaving Hong Kong so should be here in a week.

I will double check the CG with THIS...

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