Denis Watkins
-
Posts
5,797 -
Joined
-
Last visited
Content Type
Profiles
Forums
Blogs
Gallery
Calendar
Downloads
Posts posted by Denis Watkins
-
-
Our friends in Formula 1 can teach us a thing or two and they agree with Jon. Their experimental fuel intake arrangement involves a mixing area, prior to the piston cylinder, which mixes air and fuel, producing the said vapour, then ( in my understanding ) that vapour is ignited, rendering the intake charge Hot into the cylinder. We can but dream for the time being.
Found the article here
The traditional spark plug is replaced with a jet ignition chamber. Most of the fuel (97 percent) is injected as normal into the cylinder when the piston is about 60 degrees away from top-dead-center. (Top-dead-center is when the piston is at the very top of its travel within the cylinder). But within the jet ignition device, there's a small pre-chamber that includes a spark plug, and it's into this pre-chamber that the remaining three percent of the fuel is added and then ignited, when the piston is at 22 degrees from top-dead-center. At this point it becomes a high pressure jet of hot gases that enter the cylinder via a series of tiny holes, igniting the rest of the (now well-mixed) fuel and air.
-
19 hours ago, Denis Watkins said:
Yes, David is right, the little Saito 40A will be the motor of choice for the little Sport Scale Club
Have found a 6ft span Cub, N4734C
So this could be a 62A
Very nice motor
Saito 62A
-
Ripmax 40 Cub
-
Yes, David is right, the little Saito 40A will be the motor of choice for the little Sport Scale Club
-
Yes, is RC Carb
-
1
-
-
Just one more test Frank, if your battery box is still intact.
Put dry cells in, for one more try, as 4 dry cells are 6 volts.
4 rechargeables are 4.8volts
-
2 hours ago, leccyflyer said:
It further reinforces the important of a proper pre-flight control check - taking the time to do that, rather than waggle the sticks to see if the control surfaces are moving, taking the time to see if they are moving in the right directions.
-
1
-
-
Simon, all good advice above, the Cox will be about £20
Schedule your sales for after 7pm, as maximum viewing time, schedule is FREE
Also untick " Worldwide " as it defaults Worldwide and for me has been a nightmare of timewasters.
Also, don't finish the end of sale Friday or Saturday Night, as people's seldom sit on ebay at those times.
Get boxes, wrapping, and tape ready, as those motors will sell, and boxing up is a toil.
-
Try this thread size from the Ripmax Catelogue
Or maybe it is a diagram part number
-
20 hours ago, Guillaume said:
Either short beeps repeated and nothing happens, or, when I invert the throttle chanel, I get 1 , then 2 then 3 beeps and again the same sequence…
Yes, the 1,2,3 is inviting you to set the throttle
The manufacturer of your ESC should give you their sequence
But
You can try your self moving your throttle from high to low ( with the prop OFF ) during the beeps
-
-
William, are you getting steady Beeps from the motor ?
-
1 second is plenty, as Leccy says, Hot Iron, Clean joint and pre-tinned cable, good fresh solder, and just enough
Clean,bright shiny joint should result.
-
1
-
-
Check your paypal account
Just to see, as your payment may be still " Pending "
Meaning, he hasn't got the money yet
-
50 minutes ago, GrumpyGnome said:
Just need to rotate that exhaust outlet now, so the gunk goes down and not all over the wing....
Oh Yes, and
Stop the silencer filling up creating a reservoir of unspent fuel, and exhaust oil, causing a deadstick ! ! !
-
2
-
-
All the IC lads at my place have the workmate, with some great cradles of own design.
I will get photos next time out.
The cleverest cradle to develop is 2 of those hand cranked clamps that open and close very easily on their sides, and screwed side on a 3ft plank, not gripping or crushing, but offering an adjustable cradle.
2 of these clamps, can even be welded to a bracket
-
4 minutes ago, Ron Gray said:
Look on the other side of the carb, in the body a slotted screw?
Here's a pic, slot in centre of large brass nut holding throttle arm
-
1
-
-
If you decide on externals
RapidRC
-
2 minutes ago, toto said:
Hi Denis,
I could try that. What I have to watch for in doing that is the Aileron servo's and push rods on the under side of the wing when the wing is attached.
Also, is it not better the RX being nearer the floor of the fuselage as the underside is the side pointing down towards the transmitter ( normally ).
just a couple of points for further discussion as I am willing to try anything to get the best results.
cheers
toto
You are right Toto
I would still attempt not to have 2 thick metal rails so near the rx
worth moving those to the rear, cutting down unused pushrod.
You a doing great Toto
-
42 minutes ago, toto said:
OK .... nothing fancy .....
A bit thin ply ....
a bit Velcro ....
and on we go .....
I screwed the ply on with a couple of small self tapping wood screws so that if necessary .... the ply holding plate could be taken back off if it does not work out.
Thats me for the moment....
toto
Another way Toto, with cleaner air to the rx
Turn the servos round the other way, shortening the two main Steel pushrods.
The steering pushrod is long enough to reach the new location
Now put the rx forward, awAy from 2 thick metal pushrods
And mount the rx high, just underneath the wing
Just an alternative, gaining less signal shadowing
-
Screen Lock
And Screen Brightness
Look in the manual or YouTube
Hold down the round pushbutton on the bottom right
-
1
-
-
He admits he knows nothing about RC planes, and has 100% positive feedback, that is obtained freely from his customers, and feedback cannot be bought or obtained in any other way but by fair dealing. The model cannot be worth a tenner.
-
You guessed it Zf, it has been done, and there is a chap in a wheelchair, with virtually no hand input.
The Tx is mounted on the back of the wheel chair, connected by cables to the Tx sticks, and movement by leaning back and side to side, against hinged plywood pads, connected to the cables. He flies.
-
1
-
-
22 hours ago, Rich Griff said:
May I ask please, are the wings completely flat or encouraged to form an aerofoil like shape by the fuzelage ?
If not I assume the depron/foam board le and other edges rounded ?
Thanks
At our scales and weight Rich, Flat Plate Wings are frequently used, easy to build etc etc, and even back in the 1940s aerodynamics writings, we're highly thought of for grabbing lift and air penetration particularly because of square straight leading and trailing edges. Just watch Shockies perform at indoor flying events.
Glow Engine Theory and General Technical Discussion
in IC Engines
Posted
Apologies Jon
it was just supporting " vapour "