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Search: Posts Made By: cmulder
Showing results 1 to 25 of 115
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Forum: Engine Conversions
05-06-2023, 03:33 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Lightbulb one of these would work

https://www.banggood.com/Geekcreit-DC-3_7-6V-To-20KV-Boost-Step-Up-Power-Module-High-Voltage-Generator-p-915426.html?cur_warehouse=CN&rmmds=search
Have one of these running besides a model during a...
Forum: Engine Conversions
05-06-2023, 02:25 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Question has it ever been tested?

Now there are so many diferent systems avaiable has it ever been compaired how they perform alongside ignition?
Like make up a module that generates a exposed spark and then range check diferent...
Forum: Engine Conversions
05-05-2023, 04:07 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

frsky s jeti

A few of the more serious competitors here fly jeti.
I have seen the inside of the transmitters and they are build like a tank.
Cnc metal case with carbon top. Even the circuit boards look to be a...
Forum: Engine Conversions
05-05-2023, 03:08 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

Exclamation Why i HATE spectrum

Seperate post in case it gets deleted.
Spectrum almost killed me.
At one of the heli competitions one was flying a thunder tiger g4 glow heli.
This is a .90 class heli with about 700mm blades so...
Forum: Engine Conversions
05-05-2023, 02:41 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

another happy tanaris user

Got a first generation tanaris years ago. Bought it as a "cheap" transmitter to trow in my backpack to fly quads and my trex 450 heli for those "quick fix" flying sessions.
Might have been the first...
Forum: Engine Conversions
11-16-2022, 05:24 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Question do you feel like wasting $3?

would that pump surfive pumping fuel ? then you would have a much more direct flow controll compaired to compressing a gas.
power it trough a small brushed esc for example.
Forum: Engine Conversions
10-27-2022, 08:43 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

think its just a tube that v=blocks

think the fuel pressure pushes the tube out of the way once a pressure is exeeded.
The inner bronse tube goes down half way between the input and return.
Forum: Engine Conversions
10-27-2022, 08:39 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

it isn't empty

You can look straight trough the 2 bottum connections but the red tube thing is blocking the top one.
Looks like some over pressure valve.

Where do they sell those one-way check valves like ys...
Forum: Engine Conversions
10-27-2022, 04:23 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

could this be usefull?

Found this while sorting trough things.
It once came with a batch of used items and always assumed it was related to the retracts system and never opened it.
Turns out its a fuel pressure regulator...
Forum: Engine Conversions
09-28-2022, 02:43 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

the exhoust port is round right?

Don't have a wankel so working from memmory here ;)
if you have acces to tube bending tools would a tube bend so it wraps around the engine not be a option?
And if your club is not too strict about...
Forum: Engine Conversions
09-28-2022, 09:25 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

tuned pipe?

Looks like you created a primitive tuned pipe.
See if by making it longer or shorter you can find a "sweet spot" for the peak rpm you are looking for.
Forum: Engine Conversions
09-25-2022, 03:59 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

yea but..

Assumtion is the mother of all f-ups
While i share your doubd a pressurised tank is the way to go, trying might teach us things and then once there is a good working "proof of concept" see if it...
Forum: Engine Conversions
09-25-2022, 03:52 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Question wrong pressure?

Are there any "full size" equivalents where the fuel tank is pressurised?
As far as i know. most use a fuel pump .
So why not focus on finding a small fuel pump instead and avoid all the plumbing...
Forum: Engine Conversions
09-12-2022, 09:57 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Post try a "pull down" resistor

Likely there is almost no current flowing so any external noise has a relative big influence.
If you place a resistor between the pulse and ground then that resistor will "short" the noise but not...
Forum: Engine Conversions
09-07-2022, 05:20 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Lightbulb this material might be good for printing carbs and engine parts

Claims to be heat resistant up to 190c and also resistant against petrol....
Forum: Engine Conversions
08-28-2022, 04:38 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Post It depends on what material you print with

There is filament that has choped up glass and even carbon fiber mixed with the plastic.
That is basicly the same as the graupner and master airscrew prop plastics.
Resin needs to be translucent...
Forum: Engine Conversions
08-28-2022, 01:27 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Post abs smoothing

Some plastics that dissolve in acetone can be made smooth with a procedure called "vapor smoothing (https://all3dp.com/2/abs-acetone-smoothing-3d-print-vapor-smoothing/)"
This might also work on asa...
Forum: Engine Conversions
08-27-2022, 07:42 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

box of chocolates?

I highly doubd this boat ever ran well if at all. Lets say there is a diference between buying a kit and having the skills to build it correctly.

This thing needs to be stripped down and rebuild...
Forum: Engine Conversions
08-27-2022, 07:38 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Thumbs up there is smoke

White smoke ?
So engine runs and draws fuel.
Needless to say it showed the next problems.
The pressure nipple from the exhoust fell off relative easy fix once i can borrow a rivet tool to close...
Forum: Engine Conversions
08-26-2022, 02:55 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

potentional solenoid software feature?

On some of my heli engines that are prone to flooding i start lean and slowely open the needle while starting until it fires.
On the solenoid that could be a feature to slowly incease the amount of...
Forum: Engine Conversions
08-26-2022, 02:06 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

Post O-ring at carb base is new and carb was pushed...

O-ring at carb base is new and carb was pushed down while tightning the clamp-bar nut so that should be ok.
Back plate gasket yes that is a suspect.
On piece crankcase so no leak there
Carb was...
Forum: Engine Conversions
08-26-2022, 11:08 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

in the water

Am worried about ever revving so am starting in the water.
The engine starts if it has fuel but it just doesn't draw it from the tank by itself.
The carb has been apart so have no idea about the...
Forum: Engine Conversions
08-26-2022, 09:54 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

best way to make a carb suck more?

AM wondering about the fuel draw issue.
What if there is a sleeve inserted in the carb to reduce the diameter of the opening of the barrel?
That part is easy to take out of the carb by just...
Forum: Engine Conversions
08-26-2022, 08:38 AM
Replies: 2,107
Views: 220,115
Posted By cmulder

Thumbs up engine only runs off its prime

Some succes and the next problem.
Was able to get the engine to fire but it only runs a short while off it prime.
It does not draw fuel unless i put a finger over the air intake.

In all am verry...
Forum: Engine Conversions
08-25-2022, 12:28 PM
Replies: 2,107
Views: 220,115
Posted By cmulder

Post all new for me too

This came with a batch of rc things that included a almost complete raptor30 heli kit (reason i bought it) a crashed ego30 heli (stripped it down for engine and servos) and a unbuild multiplex...
Showing results 1 to 25 of 115
 
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