Marklar 7, New Step in Pnewmohudralic Jet Machines
by Katod in Workshop > Science
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Marklar 7, New Step in Pnewmohudralic Jet Machines
![DSC_0023.JPG](/proxy/?url=https://content.instructables.com/FM2/L3YU/K1Z2NL6U/FM2L3YUK1Z2NL6U.jpg&filename=DSC_0023.JPG)
![DSC_0022.JPG](/proxy/?url=https://content.instructables.com/FH8/N8HU/K1Z2NKUY/FH8N8HUK1Z2NKUY.jpg&filename=DSC_0022.JPG)
![Тестування реактивного апарата Marklar 7](/proxy/?url=https://content.instructables.com/F0N/BQKZ/K1Z2OAQG/F0NBQKZK1Z2OAQG.jpg&filename=Тестування реактивного апарата Marklar 7)
![DSC_0024.JPG](/proxy/?url=https://content.instructables.com/FAY/2T5V/K1Z2NLAT/FAY2T5VK1Z2NLAT.jpg&filename=DSC_0024.JPG)
![DSC_0056.JPG](/proxy/?url=https://content.instructables.com/FIL/HCF0/K1Z2NMXV/FILHCF0K1Z2NMXV.jpg&filename=DSC_0056.JPG)
More than a year ago I have done Marklar 3, the jet vehicle with a hybrid engine. The idea was so simple and effective that it was asked to make more and deeper. ( If you do not go by the link, this is the idea. I use in a pneumatic jet engine carburetor, that makes a mixture of air and water, that has a higher density than air, and lover viscosity than water.)
After analysis of the video, I saw a few problems:
- vehicle was unstable during the move, while acceleration it cal lay in drift and lose speed.
- during acceleration, some water overflow to the back of the vehicle and it lose air, mean energy for moving.
To fix this to problems I decided to spread the air tank and water gallon and make suspension and automatic for direction stability.
I hope this will increase the speed. Answer at the end of the article.
Materials, Instruments
![IMG_20190510_181705.jpg](/proxy/?url=https://content.instructables.com/FDL/7HKQ/K1Z2NNQO/FDL7HKQK1Z2NNQO.jpg&filename=IMG_20190510_181705.jpg)
![IMG_20190510_182746.jpg](/proxy/?url=https://content.instructables.com/FBC/IZKC/K1Z2NNSQ/FBCIZKCK1Z2NNSQ.jpg&filename=IMG_20190510_182746.jpg)
Hard to say what I use while building a vehicle. Maybe, will be easier to say, what I not use.
Shortlist of materials:
- Plastic bottle on 2.4 litter.
- hand juicer.
- a lot of wooden coffee mixers (for suspension).
- different plastic pipes.
- valve.
- wooden pieces, which can't hide from me.
- 3 wheels from roller skates.
- Arduino leonardo and accelerometer.
- bicycle nipple (Presta).
- set for a dropper.
and a lot of instruments.
Engine
![IMG_20190420_192832.jpg](/proxy/?url=https://content.instructables.com/FH7/7513/K1Z2NTV2/FH77513K1Z2NTV2.jpg&filename=IMG_20190420_192832.jpg)
![IMG_20190420_192838.jpg](/proxy/?url=https://content.instructables.com/FS1/31A2/K1Z2NTV3/FS131A2K1Z2NTV3.jpg&filename=IMG_20190420_192838.jpg)
![IMG_20190510_182751.jpg](/proxy/?url=https://content.instructables.com/F6R/KPTS/K1Z2NNUQ/F6RKPTSK1Z2NNUQ.jpg&filename=IMG_20190510_182751.jpg)
![Engine test](/proxy/?url=https://content.instructables.com/FFX/U3P3/K1Z2NW1A/FFXU3P3K1Z2NW1A.jpg&filename=Engine test)
![sheme1.png](/proxy/?url=https://content.instructables.com/FNC/98EW/K1Z2NX5A/FNC98EWK1Z2NX5A.png&filename=sheme1.png)
I don't have a 3d printer. Maybe, someday I will create some on 3d printer, but, before I create in 3d model theory of this model have to have approval. So I decided to make the main engines chamber melted together two bottlenecks.
It's an easy and simple method creating chambers with small volumes.
I connected all like shown on the scheme.
Suspension and Frame
![IMG_20190607_205636.jpg](/proxy/?url=https://content.instructables.com/FCU/JX5O/K1Z2NTV7/FCUJX5OK1Z2NTV7.jpg&filename=IMG_20190607_205636.jpg)
![IMG_20190512_193135.jpg](/proxy/?url=https://content.instructables.com/FF0/AFC5/K1Z2NTV4/FF0AFC5K1Z2NTV4.jpg&filename=IMG_20190512_193135.jpg)
![IMG_20190526_190824.jpg](/proxy/?url=https://content.instructables.com/FU1/9JGV/K1Z2NTV6/FU19JGVK1Z2NTV6.jpg&filename=IMG_20190526_190824.jpg)
The frame I build with some wood and wooden coffee mixers. The idea is very simple, use these sticks like springs.
Arduino and Me
![IMG_20191018_231035.jpg](/proxy/?url=https://content.instructables.com/F72/ZJB2/K1Z2NNUR/F72ZJB2K1Z2NNUR.jpg&filename=IMG_20191018_231035.jpg)
I ordered Arduino, mpu 6050 and servo, search in internets how to use it.
Firs problem was "How it all starts, I don't have any button or something". But, I find out that it starts after it gets power.
I found the article, which tells how mpu 6050 works, and write my own program.
Downloads
Rudder Cables
![IMG_20191019_202146.jpg](/proxy/?url=https://content.instructables.com/FF0/Z47C/K1Z2NO4T/FF0Z47CK1Z2NO4T.jpg&filename=IMG_20191019_202146.jpg)
![IMG_20191019_202126.jpg](/proxy/?url=https://content.instructables.com/F6X/12WW/K1Z2NO2S/F6X12WWK1Z2NO2S.jpg&filename=IMG_20191019_202126.jpg)
For rudder cables I use strings.
The same serv managed thrust direction and wheel.
Testing One
![testing one](/proxy/?url=https://content.instructables.com/FPR/LDKS/K1Z2NZZK/FPRLDKSK1Z2NZZK.jpg&filename=testing one)
![IMG_20191009_231018.jpg](/proxy/?url=https://content.instructables.com/FRP/O0S1/K1Z2O01F/FRPO0S1K1Z2O01F.jpg&filename=IMG_20191009_231018.jpg)
While the first testing vehicle shows low speed (11 km/h). But self-direction correction works.
After a short analysis of construction, I find out the reason why speed so slow was the ру t-like splitter. Because of it, I lose a lot of speed of air.
Bug Work and 7 Atmospheres Explosion
![IMG_20191019_101337.jpg](/proxy/?url=https://content.instructables.com/FGJ/PB9N/K1Z2NNYR/FGJPB9NK1Z2NNYR.jpg&filename=IMG_20191019_101337.jpg)
I decided to take away the t-like splitter. And during the first test bottle increase longitude for more than an inch. At that moment I don't pay any attention to that, but later I understand where it went, too late.
After a few manipulations vehicle was done, and I decided to make a "dry start" at home. It means without water.
During the second pumping, the bottle exploded at 7 atm. For big luck, nobody has an injury, except for the vehicle.
Explosion ruin suspension and place for buttery.
The buttery place I don't fix. I place buttery with a tape.
To protect the bottle I use the duct tape. And It works.
So, I protect the bottle, mace off a lot of "bottlenecks".
Testing Two and Сonclusion
![Тестування реактивного апарата Marklar 7](/proxy/?url=https://content.instructables.com/FU1/FJ5Q/K1Z2OASY/FU1FJ5QK1Z2OASY.jpg&filename=Тестування реактивного апарата Marklar 7)
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Main testing. Unfortunately, speed increases only to 15,5 km/h (the highest result). Almost twice slower than the previous vehicle.
And I think I guess why.
I try to increase jet impulse by increasing the mass of working mass by increasing outlet (was 2 mm to 4 mm). And to my realization it wrong way. To understand how to do it write I have to learn a theory about the viscosity of gases and mixtures. And find the golden middle between the density of working mass and outlet.