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Infinity 90 Build

How good is it ?

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cymaz16/01/2019 21:49:46
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8202 forum posts
1135 photos

Not yet put any cables down there yet, I will bear your idea in mind. I will se what crossing the rudder cables does first to the exit angles.

Bruce, how is yours coming on question. My new DLE20ra turned up today.

Bruce Collinson16/01/2019 22:05:12
248 forum posts

Noisy thing. I’ve agreed to sell mine to a club mate and have bought a Saito 125 to drop into the Yak.

I crossed the cables, I generally do, but the acute angle will make little odds, F3As have such long fuselages.

Mine’s progressing but slowly. Work is busy, too many green biro writers to disillusion; Wot 4 needed surgery; new small foamy F3A needs tailweight and new wing bolts, etc. Did manage to achieve a tank solution at the weekend thanks to a brainstorming session in a heated workshop. Mine will run a Laser 100 and the tank needs to go under the undercart plate, over the removable lower cowl. A Sullivan Flex Tank has been heat moulded, after a fashion, and I have the plumbing to complete. I’ve not plumbed a Laser before and am thinking hard about the vent alignment.

A full uninterrupted day might see it finished.

Jeremy is charging on with his, with an ASP 120 and a Perry pump. Something made me nervous about a pump with the tank so far back, but if his works ok then it might be a future modification ... having stripped out the built in fuel lines ...

BTC

cymaz18/01/2019 18:18:13
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8202 forum posts
1135 photos

No binding or snagging....

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As regards to noise...I know a couple of people that can weld aluminum very well. If needs be it might be a case of getting a second exhaust and getting it modified for St Austell DMC while I can still fly it at Davidstow.

BTW , I’m missing a rudder hingeangry. It might have got accidentally pushed into the slot, anyway I’ve have a spare somewhere.

Edited By cymaz on 18/01/2019 18:20:44

Edited By cymaz on 18/01/2019 18:23:08

cymaz19/01/2019 19:48:06
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8202 forum posts
1135 photos

Tidied up the closed loops this afternoon

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cymaz20/01/2019 20:29:01
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8202 forum posts
1135 photos

Spent most of today on the Infuriating Infinity....

Now, its really upsetting that the covering is starting to peel in some places. You've seen the pictures, I use foam on my bench. To have his happen before its even flown, 0/5

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Having read a couple of similar builds on RCUniverse I knew the engine would be a pig to install. They were absolutely correct. Firstly I stripped the engine right down to aid getting in between the ply cheeks in the engine bay.

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I'm glad I did....The bay is as small as a mouses' ear.

The bearers had to be eased to get the lower bolts and crankcase in

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The quiet mount is very well made with movable wings at either side. This is very useful considering the tight squeeze

engine bay.jpg

You will need to sand out the nose ring to get the thrust washer in....I left a good gap around to help the washer through

After sanding, fitting, sanding, fitting ....it finally went in . The corners of the front rubbers needed to be pared off as they hit the side cheeks. There is side thrust built in

engine nose.jpg

engine nose spinner.jpg

Beware that all the to and fro with the mount and engine, its put a strain on some small wooden pieces. Luckily there is very little sign of glue !!

nose ring.jpg

Why couldn't they have a one piece cowl. Still, its in. Now just the back to cut out for the carb. I will do that in a day or two when I've caught my breathface 3. The linkage rods from the carb are going to be fun face 1...not face 11

Peter Jenkins20/01/2019 23:43:45
1153 forum posts
127 photos

I felt the same about putting the DLE35RA into the Majestic! In my case, I had to connect the throttle and choke pushrods as well as the fuel pipe as you cannot access these with the engine in. Then I found I'd forgotten something so out it came and in it went! Then something else cropped up (I forget what) and out it came and in it went for the 3rd time! I'd got better with each operation mind! Thankfully, it has not had to be removed again. A pair of medical forceps are very useful in such restricted environments as would a course in key hole surgery!

cymaz21/01/2019 06:19:29
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8202 forum posts
1135 photos

I have to make new cable runs for the throttle and choke. I my use snap over ball links onto the carb arms. This might avoid need need of using strong language to get everything in....but I doubt it face 8

cymaz21/01/2019 06:26:03
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8202 forum posts
1135 photos

Yesterday I also finished the tail/ rudder. I’m not going to put the elevator on yet until the engine is on. Also added the last of the gluing blocks inside the fuselage

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The wing also got completed. All tidied up and Blenderm Tape on all the hinge lines. I will rotate the elevator horns through 90* as well when I get to it.

Edited By cymaz on 21/01/2019 06:27:40

cymaz22/01/2019 17:02:44
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8202 forum posts
1135 photos

I had a peek inside the DLE when I took off the carb. I must say, it’s beautiful inside. No manufacturers dross, and coating of oil. Machined very nicely. Now if it runs as good as it looks, I will be a happy bunny.

cymaz23/01/2019 21:02:35
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8202 forum posts
1135 photos

Got the engine bolted in. Only after 2 hours of trying angry. Rear two bolts and captive nuts no problem. The front two, however, no room...every time the captive nut moved it hot the cowl. As a result 3 tiny spots of cracked fibreglass. If I had used the supplied screws into the wood they would have come out the cowl by a good 1” face 22. Score 0/5

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cymaz26/01/2019 14:29:53
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8202 forum posts
1135 photos

As it is a wet Saturday in January, I thought I would get on and have something meaningful done by the end of the day. After finishing the epoxy and fibreglass cloth in the engine bay Friday night it was left to completely go off. Today’s job was get the choke and throttle runs in, servo tray built for that and run the cables....all done.

Off shopping now so pictures to follow when we/ I get back, wet from Aldi

Bruce Collinson26/01/2019 16:49:03
248 forum posts

Peter,

Mines 3.655 kg all in, dry, with a Laser 100. Does that sound about right?

BTC

cymaz26/01/2019 18:30:49
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8202 forum posts
1135 photos

I will try and do a rough weigh-in Sunday, Moday

 

Finished roughing in the control linkages, servo tray, plumbed in new pipework and tank fitted. The servo tray and new rear bracing, ( the original rear one was cut out to get the tank in) will stop the tank moving back and forth

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Edited By cymaz on 26/01/2019 18:40:56

Peter Jenkins27/01/2019 00:47:26
1153 forum posts
127 photos

Looking good!

cymaz27/01/2019 07:21:52
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8202 forum posts
1135 photos

I will have to ditch the idea of the choke servo. The indent on the shaft is quite strong, too much for the servo.

Ron Gray27/01/2019 07:44:15
1259 forum posts
333 photos

On one of my gassers I used a bellcrank so that the choke operating wire came out through the fuse. Just a thought.

cymaz27/01/2019 08:09:40
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8202 forum posts
1135 photos

You read my mind.....the principal of KISS should apply here. New servo tray to be made dont know

cymaz27/01/2019 10:17:00
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8202 forum posts
1135 photos

Simpler, lighter, more positive action......

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Peter Jenkins27/01/2019 10:22:08
1153 forum posts
127 photos

Good solution. I've never liked choke rods coming out of the front of the cowl - don't know why though!

cymaz27/01/2019 18:51:40
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8202 forum posts
1135 photos

Well I thought it couldn’t get worse with the build quality crook. Unpacked the legs today to figure out the prop clearance.

It’s a brand new model....check

The legs well packed in foam...check

Someone in quality control needs a good kicking...

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Put the legs on. They only fit on one way. As a result both legs are twisted and I hope show up on the photos. It’s not easy but you hopefully get the idea.... Score, -1/5

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Anyhow, we soldier on. Fuel proofed the engine bay and landing mounting plate. Also fixed some wooden blocks to screw the other cowl half into

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