Author Topic: Aero engine rescue (Read 399890 times)

Triple Jim · « **Reply #810 on:** March 03, 2015, 07:32:48 PM »

Propeller driven car: https://www.youtube.com/watch?v=8Dv-gl6RCGc

And a more modern one: https://www.youtube.com/watch?v=fGu-HD3bmlM

johnr · « **Reply #811 on:** March 03, 2015, 09:13:22 PM »

Couldn't see much in the way of brakes on that second clip. Scary!

Triple Jim · « **Reply #812 on:** March 03, 2015, 09:16:05 PM »

Quote from: johnr on March 03, 2015, 09:13:22 PM

Couldn't see much in the way of brakes on that second clip. Scary!

Yes, I noticed that too! I didn't see any rear wheel brakes, so it was just a front brake? There had to be something like a disk on the right side of the front wheel.

John A · « **Reply #813 on:** March 03, 2015, 09:21:08 PM »

The prop is on that thing to pull it in reverse. That should be fun at high speed.
The big Polish radials on AN2 biplanes rotated opposite western engines so maybe that does also.

Wildguzzi.com · « **Reply #813 on:** March 03, 2015, 09:21:08 PM »

Triple Jim · « **Reply #814 on:** March 03, 2015, 10:29:26 PM »

Quote from: john A on March 03, 2015, 09:21:08 PM

The big Polish radials on AN2 biplanes rotated opposite western engines so maybe that does also.

Good information, John. I was looking at the prop pitch and its foil shape when I said that, but after your post I checked the video: https://www.youtube.com/watch?v=yGeSIM_8BHY

At the end when the engine stops, it looks pretty clear that it rotates counterclockwise when viewed from the rear, which means the prop is pushing the car forward, but is rotating the opposite direction from what it was designed for!

kirby1923 · « **Reply #815 on:** March 04, 2015, 03:24:23 PM »

The pusher prop on that bug when turning creates a large low pressure area just in front of the engine,(behind the prop) which will draw air. thru cylinders.
Those engines were designed to cool low speed aircraft at 60% power or more. Probably no cooling problems with that installation.

:-)

Chuck in Indiana · « **Reply #816 on:** March 11, 2015, 04:24:36 PM »

Sunny and 51 today. ;-T Took it for a putt, now that the glow has had a little time to marinate.

It's freakin awesome.. ;D What a sweet runner. What was Guzzi thinking, not putting this sucker in the small block line???

Mark West · « **Reply #817 on:** March 11, 2015, 05:32:32 PM »

I thought this bike was totally cool. Why didn't they make this? Was that when they were going broke or something?

Penderic · « **Reply #818 on:** March 11, 2015, 05:58:37 PM »

The admin boys must have had something bigger in mind.

;D
She had told them size matters.

zedXmick · « **Reply #819 on:** March 11, 2015, 08:41:59 PM »

Quote from: Chuck in Indiana on March 11, 2015, 04:24:36 PM

It's freakin awesome.. ;D What a sweet runner. What was Guzzi thinking, not putting this sucker in the small block line???

+ a zillion ;D

tiger_one · « **Reply #820 on:** March 12, 2015, 08:08:37 AM »

That is beyond me, like a huge step backward to not hit the ground running with those heads on the V7s. Had to be a bean counter decision back in the day.

rocker59 · « **Reply #821 on:** March 12, 2015, 10:10:35 AM »

Quote from: tiger_one on March 12, 2015, 08:08:37 AM

That is beyond me, like a huge step backward to not hit the ground running with those heads on the V7s. Had to be a bean counter decision back in the day.

Moto Guzzi S.p.A. under Trident Rowan Group probably didn't want to spend money a small block variant, what with lots of money being spent on the Califorina EV makeover of the Tonti California line and the upcoming V11 Sport makeover of the spine frame line.

Probably just not enough money to go around. It does make one wonder why so much money and resources were spent developing the prototype, though.

The bike was in the 1997 product brochure as "coming soon", Aprilia took the reins in April 2000 and probably permanently shelved the idea.

Chuck in Indiana · « **Reply #822 on:** March 19, 2015, 03:11:40 PM »

Well, this was a good news and bad news day. A couple of days ago I took the Lario for it's first "long" ;D ride. Filled up with gas, and came back to the same station after 114.3 miles, and put in 2.3 gallons. That makes me think the needle jet and needle are about right. Did a WFO plug chop when I came home..that was interesting on our chip and seal road..had a hard time keeping it going straight, and by the time I got it under control I saw the tach needle going past the red line. :o Gotta get a rev limiter. Shut it down and coasted to the Guzzi Garage. Today, I had a look at the plugs to see if the main jet is too lean. *I don't know anything about performance tuning* but they look ok to me..

That's the good news.
Decided since that was the 6th heat cycle, I'd torque the heads and adjust the valves. Did the left cylinder, and when I went to the right, the M8 stud seemed too loose. Started to bring it up, and at 20 ft lbs, it just kept turning. ::) That's just freakin great.. >:( Now, is it the stud or is it the nut?

I don't have a good feeling about it just being the nut, but dunno. It looks like my options are either cutting off the nut some way, or welding the nut to the (no doubt unobtainium) stud and see if it will torque down. ::) I've heard of nut splitters, is this a viable way to do it? I'd hate to get a grinding wheel in there and go at it, but I suppose I could if need be.

tiger_one · « **Reply #823 on:** March 19, 2015, 03:27:28 PM »

Couple of hot tacks from a mig would do it. Plenty of bolt to weld to.

Or you could start another nut, and weld up the middle to the bolt.

Xlratr · « **Reply #824 on:** March 19, 2015, 03:51:10 PM »

Quote from: Chuck in Indiana on March 19, 2015, 03:11:40 PM

Did the left cylinder, and when I went to the right, the M8 stud seemed too loose. Started to bring it up, and at 20 ft lbs, it just kept turning. ::) That's just freakin great.. >:( Now, is it the stud or is it the nut?

Just checking if I understood that right. The stud kept turning?? :-o

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kevdog3019 · « **Reply #825 on:** March 19, 2015, 03:53:11 PM »

So you're saying you can't back the nut out? Is the stud turning when you are backing it out? ???

Antietam Classic Cycle · « **Reply #826 on:** March 19, 2015, 04:04:46 PM »

Turn the nut with a wrench, watch to see if the stud turns. <shrug> ;)

Chuck in Indiana · « **Reply #827 on:** March 19, 2015, 04:45:29 PM »

No, the stud isn't turning.. yet.

Xlratr · « **Reply #828 on:** March 19, 2015, 05:23:30 PM »

That sounds good.
Far be it for me to give you advice on any engine build matters, but if I couldn't unscrew the nut, I'd probably want to weld another on the top bit of the stud and remove the whole thing.

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kevdog3019 · « **Reply #829 on:** March 19, 2015, 05:30:42 PM »

If the nut won't back out why do anything to keep it on? Did you torque it down the first time? Leave it be and ride the thing gets my vote. Look for weeps along the head gasket along the way. What's the worst that can happen?

Chuck in Indiana · « **Reply #830 on:** March 19, 2015, 06:31:41 PM »

Quote from: kevdog3019 on March 19, 2015, 05:30:42 PM

If the nut won't back out why do anything to keep it on? Did you torque it down the first time? Leave it be and ride the thing gets my vote. Look for weeps along the head gasket along the way. What's the worst that can happen?

[/b]
Yeah, but it started feeling a little weird at around 25, and I quit. <hanging head in shame>

Quote

What's the worst that can happen?

I'd say the head could warp. I'm dealing with unobtainium stuff here.. that's the *last* thing I'd want to happen. I'd weld the nut to the stud first and see if I could torque it down.

So. Cut the nut off? Weld it on and see if the stud is stripped, too?
I'm not doing anything without sleeping on it (I do my best work in bed) :o and listening to advise from this list.

Antietam Classic Cycle · « **Reply #831 on:** March 19, 2015, 06:44:48 PM »

Quote from: Chuck in Indiana on March 19, 2015, 06:31:41 PM

So. Cut the nut off?

Since the stud isn't turning, this gets my vote.

Chuck in Indiana · « **Reply #832 on:** March 19, 2015, 06:51:18 PM »

Quote from: Antietam Classic Cycle on March 19, 2015, 06:44:48 PM

Since the stud isn't turning, this gets my vote.

What with? Do I have to get a little grinding wheel in there? :o

Xlratr · « **Reply #833 on:** March 19, 2015, 06:53:18 PM »

Quote from: Antietam Classic Cycle on March 19, 2015, 06:44:48 PM

Since the stud isn't turning, this gets my vote.

And if it's the threads on the stud that are stripping? Cutting off the nut might damage something and you still end up with a stud that needs removing. As it is, there's a lot of stud poking out above the nut to weld something to and then just turn the whole thing out.

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Triple Jim · « **Reply #834 on:** March 19, 2015, 07:05:57 PM »

My limited experience with a nut splitter says that's a decent option. The nut should split before you contact the stud threads with the splitter chisel.

biking sailor · « **Reply #835 on:** March 19, 2015, 07:08:05 PM »

Sleeping on it is never a bad idea. ;)

Since the nut is turning on the stud, we can assume both the nut and stud threads are damaged. Welding the nut on might allow you to get the proper torque on the stud, then remove the stud and replace it later at your convenience.

Whatever you decide, just make sure it is repaired properly at some point.

Good luck, and I've enjoyed following build thread and am pulling for ya! ;-T

John A · « **Reply #836 on:** March 19, 2015, 07:23:58 PM »

Decent quality nut splitters work well. I'd look for a Snap on or OTC. The Chinese ones may or may not work once.

SED · « **Reply #837 on:** March 19, 2015, 09:26:36 PM »

What makes you think it is not the stud pulling out of the block?

mwrenn · « **Reply #838 on:** March 20, 2015, 12:36:18 AM »

I'm surprised that is an M8 stud. Figured it would be a 10 MM. I have some spare 4130 chromemoly cold rolled m8 and m10 studs, in various lengths. Might just have what you need. Let me know if you need one.

tiger_one · « **Reply #839 on:** March 20, 2015, 06:08:01 AM »

I have some high strength bolts/studs from a ducati in various lengths, but think they are M10.

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Author Topic: Aero engine rescue (Read 399890 times)

Wildguzzi.com

kirby1923

Penderic

biking sailor