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Search: Posts Made By: John_M_
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11-29-2022, 09:10 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

Does it leak that much around seat edge?... small...

Does it leak that much around seat edge?... small bubbles would indicate a seepage around the insert, but I'd be surprised if it caused any issue with the engine running... The only concern would be...
11-29-2022, 12:31 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

So the bronze valve seat insert is leaking around...

So the bronze valve seat insert is leaking around the head casing.... I believe the head is cast around those bronze seat inserts... I can't imagine the leak being that great around the casings when...
11-27-2022, 11:36 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

As long as you can mix 2 or more channels to the...

As long as you can mix 2 or more channels to the throttle channel, you can do anything with that XIAO... you can use a toggle switched channel to initiated the cold start fast idle sequence... build...
11-27-2022, 10:39 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

You could do that through another spare channel...

You could do that through another spare channel input to the MCU...

If you have the air pump follow the mixture curve... invert the signal so when the solenoid driver output is high, the air pump...
11-27-2022, 09:17 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

You could take the solenoid output signal pin on...

You could take the solenoid output signal pin on the MCU and loop it back through another input... in the sketch add your air pump loop, invert the signal out to another output pin to the air pump...
11-25-2022, 01:58 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Well you're almost there now, especially with the...

Well you're almost there now, especially with the TBi carb... If you can get the air pump, and the solenoid driver / micro-controller & LCD in one box, that would be a nice compact package with...
11-24-2022, 10:02 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

Its definitely a neat idea, and can appreciate...

Its definitely a neat idea, and can appreciate all the collating minds at work here as well... reminds me of a image I found of a small efi system that was developed for UAV's, everything fits in the...
11-23-2022, 03:52 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Oh, I don't care where you acquired them...

Oh, I don't care where you acquired them either... The first one I got was from overseas, from some vendor that had a hand drawn paper sign, STIHL Parts Department " Back Door Sale " :D... the...
11-23-2022, 03:12 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

I have one, but if you recall, its quite a bit...

I have one, but if you recall, its quite a bit bulkier than the original walbro, even with all the choke interlock linkage removed... so much so, the engine needs to be moved forward about 5/16" -...
11-23-2022, 09:37 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

BTW, I had a miner set back on modifying the...

BTW, I had a miner set back on modifying the walbro to fit the solenoid valve... turns out the Hi/Lo needle spacing is just a bit wider than the solenoid, so the solenoid won't seal in the bore due...
11-23-2022, 08:54 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

Definitely, especially when its not running 100%...

Definitely, especially when its not running 100% duty cycle all the time. Just have to be careful when filling the tank that no residual fuel enters the air pump line... You guys are certainly...
11-22-2022, 08:46 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Interesting, they show the dual nipples version...

Interesting, they show the dual nipples version as both nipples being separate outlets, one for each membrane piston... the single nipples version has double the flow rate over the twin nipple...
11-22-2022, 12:12 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

So it looks like both those nipples are air...

So it looks like both those nipples are air outlets?, so the pistons alternate back and forth, where is the air inlet?... That drawing isn't very clear :)

***EDIT***

This model has only one air...
11-21-2022, 07:14 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Ok, whats the check valve made of?... Some...

Ok, whats the check valve made of?...

Some silicone formulas are resistant to petroleum / gasoline... if that pump was intended for medical use, it probably has a food grade silicone membrane......
11-21-2022, 11:34 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

That 100 hour life cycle, I would suspect if the...

That 100 hour life cycle, I would suspect if the pump is run at full duty cycle, but since it will be modulated, the life expectancy should be extended... only unknown is how the pump membrane will...
11-20-2022, 11:07 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

Found this library, maybe what you're looking...

Found this library, maybe what you're looking for. :)

https://github.com/bolderflight/sbus
11-20-2022, 10:35 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

I believe FrSky offers a SBUS decoder so you...

I believe FrSky offers a SBUS decoder so you could breakout each SBUS address.
11-11-2022, 02:40 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Ok I understand... so does the spring compress...

Ok I understand... so does the spring compress all the way with no more room inside the bore tube when the nose wheel is compressed to its stop... in other words would there be room to pack the...
11-11-2022, 12:34 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Well you could wind your own from some music...

Well you could wind your own from some music wire... I use to make my own sprung loaded steerable tailwheels that worked a treat... different application I know, but still they turned out to work...
11-11-2022, 10:46 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

Like the space shuttle...that was meant to land...

Like the space shuttle...that was meant to land only, and when static had a negative incidence on the aiirfoil, probably wouldn't rotate into flight easily.
11-11-2022, 10:11 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

You think ? :)... it was probably designed by a...

You think ? :)... it was probably designed by a young labor from over seas... if you can get at the spring, replace it with one that offers a bit more preload on the nose gear
11-10-2022, 06:25 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

Ahh yes I understand... Is it possible the model...

Ahh yes I understand... Is it possible the model has a nose down stance when the model is static on the ground, it would have a negative wing incidence ... that would aggravate the issue, as the...
11-10-2022, 12:26 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

That reminds me of the "little engine that could"...

That reminds me of the "little engine that could" :D

You need a run of short cut artificial turf, and stake it to the ground for a temporary rwy... There's a couple Brothers from Slovenia I...
10-12-2022, 12:15 PM
Replies: 1,228
Views: 27,002
Posted By John_M_

I can agree with you there... brings to mind the...

I can agree with you there... brings to mind the old RC Quakers that just lumbered around in the air... and it takes a lot skill to fly a plane that is marginally powered... but you can simulate that...
10-12-2022, 04:09 AM
Replies: 1,228
Views: 27,002
Posted By John_M_

Well true, the definition of underpowered would...

Well true, the definition of underpowered would very from pilot to pilot... the sig kadet MKII has an engine rating for a .25 - .40 2 stroke, flying weight 5 lbs... so if the LT25 weighed less, 10oz...
Showing results 1 to 25 of 236
 


 
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