openspaceman
-
Posts
9,931 -
Joined
-
Last visited
-
Days Won
5
Content Type
Profiles
Forums
Classifieds
Tip Site Directory
Blogs
Articles
News
Arborist Reviews
Arbtalk Knot Guide
Gallery
Store
Freelancers directory
Everything posted by openspaceman
-
what tree to choose as grow-your-own Armco?
openspaceman replied to noco's question in Homeowners Tree Advice Forum
I was thinking of sweet chestnut rather than concrete 😉 -
what tree to choose as grow-your-own Armco?
openspaceman replied to noco's question in Homeowners Tree Advice Forum
This is why I thought dragon's teeth were good, only 500mm above the ground and a bit more below the car rips its bottom out, absorbing energy as it pushes the tooth over, without impinging on the passenger compartment, I have reason to take this view. -
No and as @Rough Hewn says it has been about since at least 2015, though I did not know. Shows it working
-
Well worth it IMO as dicking about getting a site spotless is time consuming.
-
I've heard similar tales from an RAF regiment Squadron Leader about recovering CVRT with a Kinetic Energy Recovery Rope but they depend on stored energy giving the extra impulse so problems to be expected if something gives. Also wire rope winching failures at sea but there also the energy is stored in the weight of whatever is trawled up when the wire breaks and lashes around as the load drop. Pulling logs tend not to have these catastrophic failures.
-
Yes that was the same on my crusader sport hybrid I never saw indicators on bikes before Japanese bikes were common . It's well over 50 years since I scraped through my bike test but I always agreed with Stirling Moss, silly to have to take one's hands off the controls to indicate a change of direction. Mind I've had to add LED tell-tales to the mirrors to remind me I am indicating as the standard ones are too far below my vision and I'm used to self cancelling indicators that I forget to switch them off in my dotage.
-
Okay, I hadn't seen it before
-
Yes and it's really the rings you need to see as well to see if the aluminium pick up has jammed them in their grooves
-
I don't like to see any witch hunts, and that included plogs, when there are a number of ways of ignoring threads or posters one does not like to read.
-
...but he didn't
-
Certainly but in that video the wire rope and hook were propelled by the elasticity in those purple straps not energy stored in the wire.
-
It may be so if bought 200litres at a time it would just over double the cost, which is insignificant on my low mileage on bikes and 49 year old car. What RON are these alkylate fuels?
-
the fibre core holds some lubricant but no need with modern galvanised stuff for rust proofing
-
Yes, as long as the cable wraps firmly on the drum with no kinks I don't think a bit of twist matters.
-
Thanks I didn't know that. So can I have a prolific cob on a single stem?
-
I'll take your word for it but unlikely to need to try it myself
-
Makes sense although it's counter intuitive to use a file that way.
-
I wish it were that rare, I seem to see it on every pear near me
-
Do you know why?
-
It was Mandy
-
I see, so the electro-hydraulic only works when the head is parked? The reason high pressure filters are not used a lot is they are very limited in their size because as this increases the bursting forces increase with the square of the dimension. A return filter is under little pressure (until it blocks which is why there is often a bypass relief) so can have a large filtering area. Scuse the poor drawing When the electro-hydraulic is not parked the petrol can be started and the shuttle moves to block the electric pump output. Similarly when the petrol pump is stopped the elecric pump provides flow and blocks the output of the petrol pump. The relief valves are safeguards should both pumps become fired up
-
I don't think flame speed comes into it very much, I think higher RON fuels has a slightly lower calorific value, it's just that the lower compression engine burns at much the same temperature but the power stroke expands from a lower initial pressure, so you get less work out of the heat put in. Conversely if you put a lower RON fuel in an engine that is designed for higher RON then as the piston compresses the fuel:air mix it may become hot enough for the fuel to ignite before the spark or, more likely, as the spark starts the combustion, the pressure and temperature from the expanding flame front detonates unburned fuel.
-
Yes @Johnsondsays the the pressure relief valve is on the (spool) block then neither pump is protected if the manually operated valves are make before break. A pressure relief valve between each pump output and tank would solve this but then you may as well put a shuttle valve where the manual valve is and let it do it automatically. The hydraulic high pressure filter is a bit unusual for this sort of use. Normally on simple 12V pumps built into the reservoir ( as on a tipper) a switch on the spool powers up the electric pump, if so this would need disabling while the petrol pump runs to cut wear on the 12V pump constantly blowing off the relief valve .
-
World's biggest wood yard?
openspaceman replied to Ontario Firewood Resource's topic in Firewood forum
It keeps out the stain fungus too and strangely makes the milling better.
