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Hennie Engelbrecht

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Posts posted by Hennie Engelbrecht

    How to heat a freezing workshop?

    in Workshops & Tools

    Posted

    Jon Matcho said:

    My shop heater was installed today. It's been running on the lowest setting (guessing 15,000 BTU) for the past couple hours. The outside air temp is 18F and inside at table level is 45F.

    I'm happy with that for starters, but will be looking for substantial improvements once I get some good insulation installed in the spring. In the meantime, I'm going to put panels and plastic up over the doors and windows. Hopefully that will get me up to 70 degs or so.

    Move to middle east and I guarantee you a 100 degrees or so

    Hennie

    • Haha 1

    Supercharged ChevyV-6/V-8

    in Coffee House

    Posted

    Weight Issue

     

    Someone is South Africa added some length to the nose end of a CozyM IV, and changed the shape of the nose to make it a bit more pointed( I like the way it looks), but it gave him enough room to put the battery up front(counter-balance, offset the weight of the supercharger is my thought) , I am wondering .

     

    I have seen the cozy you refer to. It belongs to Jannie Versfeld. He is installing a 540 into his cozy. He will use the battery to offset the additional weight. I will ask Jannie if I can post a picture of his plane. It looks absolutely beautiful and is almost finished(exhausts, radio remaining)

    Hennie Engelbrecht Qatar

    Sandblasting

    in Finishing & Painting

    Posted

    I. So does including extra weight by peel-plying everything also.

     

    Spodman , do I understand correctly that you want to leave the peel-ply on the part? This item gets "peeled" off after cure to provide bonding surface. so you in fact reduce weight when using peelply

     

    Hennie E

    Ceramic coating / Heat treating

    in General Engine & Fuel System Topics

    Posted

    Originally posted by Jim Sower

    <...I used the plasma spray coating process on the inside of plasma guns with great success. Reduced heatloss in the plasma a lot. Therefore reduced cooling requirements. The coating that I used was more exotic than one would need for exhaust pipes...>

    What are plasma guns? How hot and how hard flow, etc.?

     

    You can probably describe a plasma as a fourth state of matter solid, liquid gas , plasma. It is generated in a electrical arc to which you add a gas . It then causes a very high temperature ( 8-10 000 deg C)flow of plasma. There is a high temperature gradiant in the plasma gun so the temperature at the wall will be around 4000- 6000 deg C depending on many parameters. The way to protect equipment is to coat with ceramics/ exotic metal

     

    <...ceramic coat the piston faces, valve faces, cylinder head ... US$100...special paint on the exhauslt manifold, turbine casing, tailpipe for another US$30... .coat the remaining moving parts ...vastly improves lubrication for US$70...Not bad improvements to an engine for $200...improved hp, reduced operating temps, improved turbocharger efficiency...>

    Let's see .... the last time a guy offered to fix my life for a hundred bucks ....:)

     

    Is the exhaust treatment on the inside or outside of the pipe? If it's outside, pipe has to absorb the heat that doesn't transfer, if it's inside, how does it hold up to the exhaust pulses and all the nasty stuff in exhaust?

     

    How many racing teams use this stuff and what do they have to say about it?

     

    In my experience, stuff that sounds too good to be true ....

    Ceramic coating / Heat treating

    in General Engine & Fuel System Topics

    Posted

    Originally posted by John Slade

    Steve Brooks (building turbo 13B Cozy IV) on the fly rotary list had his exhaust pipe ceramic coated for about $40, I think.

     

    The company's web site is www.jet-hot.com and their number is 800-432-3379. They claim the coating reduces radiant heat, reduces the heat absorbed by the exhaust pipe itself, and increases engine power.

     

    I'm considering this for my stainless exhaust shroud (pictures soon), but I'm concerned about focusing all the heat in one place - onto my wood prop.

     

    I used the plasma spray coating process on the inside of plasma guns with great success. Reduced heatloss in the plasma a lot. Therefore reduced cooling requirements. The coating that I used was more exotic than one would need for exhaust pipes but I am sure you will see a big difference. http://www.flamesprayinc.com/coatings.htm has some information that can be useful.

    Measurements (ie Garage Door)

    in Coffee House

    Posted

    Originally posted by NativeSpirit

    Hey Folks,

     

    I am wanting to buy some plans for a Cozy Mark IV, and have been taking measurements trying to figure out where to build it/her.

     

    My garage door is only 6'11" high. Will I be able to get the fuselage under/through that to transport to airfield when completed?

     

    I have noticed the height being given for the Cozy is 7'9".

     

    Thanks, Joe Spirit.

     

    Have a look at Jannie versfeld's website (Chapter 25). He has some very interesting photographs where his plane is fully assembled in a double garage. Wings are sticking out both sides

    http://qmain.tripod.com/new_page_25.htm

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