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Search: Posts Made By: Cat 1
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Yesterday, 05:56 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Yes John... the leakage is more apparent around...

Yes John... the leakage is more apparent around the port clearance.. Im assuming its also harder to get a long lasting gas tight fit around a large cast in part than it would be to do the same with a...
11-29-2022, 05:57 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Brilliant idea Bert ... I think I have all the...

Brilliant idea Bert ... I think I have all the materials needed. Will document when do it. As John said I don't think its enough to really effect how the engine runs and I'm sure the seat will not...
11-29-2022, 06:05 AM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Valve seat is ok and valve seals well - Made a...

Valve seat is ok and valve seals well - Made a delrin plug and held it in with a 3mm cap screw though the guide. filled the head and small pressure on the port and bubbles showed it definitely...
11-28-2022, 06:51 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

I'm stuck up at one of our northern bases this...

I'm stuck up at one of our northern bases this week doing management coverage so no shop time this week.. but I want to share a couple of weekend items.

Because I plan to utilize the e-pump now on...
11-27-2022, 06:50 AM
Replies: 1,228
Views: 27,013
Posted By Cat 1

On your picture Dave - Looks like you got the...

On your picture Dave - Looks like you got the right style - There are tons of versions and it seems like many different manufactures too.

I am aware if the step restriction but for the...
11-24-2022, 07:43 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

We must make a Pact that when our system starts...

We must make a Pact that when our system starts to look like this, we will just stop this and FLY MORE!!!!!! :)
11-24-2022, 07:39 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Package showed up today from overseas and had...

Package showed up today from overseas and had some air movers in it.. Have an assortment to play with of a few differ styles - One is even marked "water pump"...

Attaching a little video to show...
11-24-2022, 05:32 AM
Replies: 1,228
Views: 27,013
Posted By Cat 1

I can do that Dave.. The last time I flew the ST...

I can do that Dave.. The last time I flew the ST .45 setup it was in the mid 20's Celsius. Without playing I will pull it out on a cold day and give it a try..

I do think we will be limited by...
11-23-2022, 07:40 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Now what we need is some air time to prove this...

Now what we need is some air time to prove this system out, and unfortunately Old Man winter has found us here - I do try and get out and fly (on ski's) a bit during the winter but its not conducive...
11-22-2022, 07:26 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Took one apart - Curiosity killed the cat!!! the...

Took one apart - Curiosity killed the cat!!! the thing is actually a twin with two cylinders and two sets of valving - the top is a trick with porting as the middle port is the outlet and the side...
11-21-2022, 08:09 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

I suspect the pump check is a membrane type...

I suspect the pump check is a membrane type silicone valve also - I will pull one apart to have a better look but I have attached a drawing and specs - They are a positive displacement pump with two...
11-21-2022, 03:16 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

John, I'm sure the membrane is silicone type...

John,

I'm sure the membrane is silicone type material so wouldn't stand up well to fuel (other than glow) The fuel vapour is not an issue as the outlet check works very well and vapour can't be...
11-20-2022, 08:38 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

On my Boxer I will be running this pump with the...

On my Boxer I will be running this pump with the solenoid - The reason for chasing this pump solution was to eliminate the need to "restrict" the short 4 stroke exhaust to get a decent muffler...
11-20-2022, 07:52 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Just read through my last post and didn't like...

Just read through my last post and didn't like how it seemed to imply that this is a full on replacement for the solenoid - I don't think it is... I think it will work well on some less critical...
11-20-2022, 07:30 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

The pump is actually a quick responding setup...

The pump is actually a quick responding setup Dave - Not as precise as the solenoid but very capable of keeping mixture in check - Im thinking the feedback from the rpm is helping in this regard but...
11-20-2022, 04:54 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Dave, I have done both now - Used it for muffler...

Dave, I have done both now - Used it for muffler pressure only and then added the curve function for the ability to do the curve like the solenoid. Both work but the solenoid is a finer control in...
11-16-2022, 06:48 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

That'll work!! Could build it as an add on to...

That'll work!! Could build it as an add on to the stand be used when needed..
11-16-2022, 06:16 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

The pump has a silicone seal/diagram - Would not...

The pump has a silicone seal/diagram - Would not like gasoline - But as Bert pointed out I think it would deliver too much.



Thanks about right.. Remember the faster they go there clearance...
11-14-2022, 11:02 AM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Thats a good idea Bert.. I will incorporate that...

Thats a good idea Bert.. I will incorporate that when I get a chance. I find myself looking for cues from the linkage if I can but some times its hard to tell looking back trying to decipher and...
11-13-2022, 04:54 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

They claim 100 hours of service life. They are...

They claim 100 hours of service life. They are typically used in medical equipment (BP measurement). They are very simple and efficient for air output for their size.. I have a couple of different...
11-13-2022, 02:10 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Waiting for videos to upload from testing today -...

Waiting for videos to upload from testing today - Good success today...

I did get a "pressure curve" from the muffler tap today and its quite exponential as Bert expressed - Here is the quick...
11-13-2022, 07:19 AM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Needle valve.... I found a solution. The typical...

Needle valve.... I found a solution. The typical OS FSR type needles are identical length and thread (and sealing) but the taper is over twice as long . Will try today.

Did take some real quick...
11-12-2022, 07:55 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

Sorry to hear about your trouble Bert.....

Sorry to hear about your trouble Bert.. Frustrating when a plane showed great promises as a plane but wouldn't behave on the ground .... These "secondary system" issues are frustrating as we know the...
11-11-2022, 05:03 AM
Replies: 1,228
Views: 27,013
Posted By Cat 1

How does it fly Bert? I see there was a Landing...

How does it fly Bert? I see there was a Landing so there must have been a successful takeoff :)

Looks like it might of "ran out of elevator" just at the end of the landing sequence.. that...
11-06-2022, 03:57 PM
Replies: 1,228
Views: 27,013
Posted By Cat 1

My initial thought going into this is a bit more...

My initial thought going into this is a bit more than "normal" pressure (maybe 1 psi) and pinching a bit on the top end and idle settings - This should allow for a bit of headroom to lean out the...
Showing results 1 to 25 of 173
 


 
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