pengxing10
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Pigi_102,Thanks for the tips so that I can see the photo
Boll Aero - my first engine build
- Thread starter Roboguy
- Start date
Help Support Home Model Engine Machinist Forum:
One way to help starting with a slightly poor piston fit is to inject a drop of thin oil into the exhaust port, which helps the seal.
It will not work miracles, but helps in marginal cases.
I have kept diesel fuel for several years in metal cans a nd found it still works ok.
Do not give up, it is not unusual to have to make more than one piston on a first engine, it gets easier with practice, and bigger engines are not so tricky as small ones, hence my idea to design a larger engine based on the idea of the ML Midge .
I am now up to a 7.5cc engine which turns a 12x6 prop happily and ran first time, l still had to adjust the contra piston fit a bit by whacking a brass spinner nut into the top of it to expand it slightly so it did not run back when running.
It will not work miracles, but helps in marginal cases.
I have kept diesel fuel for several years in metal cans a nd found it still works ok.
Do not give up, it is not unusual to have to make more than one piston on a first engine, it gets easier with practice, and bigger engines are not so tricky as small ones, hence my idea to design a larger engine based on the idea of the ML Midge .
I am now up to a 7.5cc engine which turns a 12x6 prop happily and ran first time, l still had to adjust the contra piston fit a bit by whacking a brass spinner nut into the top of it to expand it slightly so it did not run back when running.
Hi all,
Neat to see some interest - it looks like photobucket have gone a bit nuts. I don't have time to move all the photos to a new hosting site and repost the links here at the moment, but I think if you visit my album on the photobucket site directly you should be able to see the images.
http://s604.photobucket.com/user/wlgjafi/library/Boll Aero build?sort=3&page=8
If that doesn't work and anyone desperately wants to see them PM me and I'll figure something out.
Unfortunately I haven't had much time to spend out in the workshop for the last 12 months or so. I just can't get diesel fuel or the ether to make any locally, so I intend to try replacing the diesel head with a glow plug head to see if I can get this engine running. If and when that happens I definitely post some updates!
Cheers,
James
Neat to see some interest - it looks like photobucket have gone a bit nuts. I don't have time to move all the photos to a new hosting site and repost the links here at the moment, but I think if you visit my album on the photobucket site directly you should be able to see the images.
http://s604.photobucket.com/user/wlgjafi/library/Boll Aero build?sort=3&page=8
If that doesn't work and anyone desperately wants to see them PM me and I'll figure something out.
Unfortunately I haven't had much time to spend out in the workshop for the last 12 months or so. I just can't get diesel fuel or the ether to make any locally, so I intend to try replacing the diesel head with a glow plug head to see if I can get this engine running. If and when that happens I definitely post some updates!
Cheers,
James
Hi Roboguy,Checked out the photos via your link,thanks for that, Like what your doing And will follow your progress with interest.
Love the Super 7 I have restored one myself over a period of time and will be putting it to good use.
Cheers
Allen.
Love the Super 7 I have restored one myself over a period of time and will be putting it to good use.
Cheers
Allen.
This is my latest finished baby MP3.2 which i designed some time ago.You may look at "finished projects".
joco-nz
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Yeah the collateral damage in NZ due to certain illegal drugs is ether is now a controlled substance. So unless someone has some bright ideas, from what I can tell the model "diesel" engines using ether based fuel are a dead duck in NZ.
Such a pity.
Looks like IC's ignition is going to have to be glow plug, Hot Bulb, true Diesel or Spark. Of course if someone has some cunning plan on the ether front I would love to know about it as I am sure would James.
Cheers,
J.
Hi joco-nz, On the subject of etherless fuels I follow an Oz Model Aero Engineer (he writes for several magazines goes by the name of Brian Winch)that has done a fair bit of testing on model compression ignition engines.
Very interesting findings,he also has tested the different oils that are blended in the fuel.
Try his E-Mail : [email protected]
Cheers
Allen.
Very interesting findings,he also has tested the different oils that are blended in the fuel.
Try his E-Mail : [email protected]
Cheers
Allen.
Hi joco-nz, On the subject of etherless fuels I follow an Oz Model Aero Engineer (he writes for several magazines goes by the name of Brian Winch)that has done a fair bit of testing on model compression ignition engines.
Very interesting findings,he also has tested the different oils that are blended in the fuel.
Try his E-Mail : [email protected]
Cheers
Allen.
Very interesting findings,he also has tested the different oils that are blended in the fuel.
Try his E-Mail : [email protected]
Cheers
Allen.
Hi joco-nz, There is a a guy here in OZ a model engineer that has been doing research into etherless diesel fuel,has come up with some interesting findings.He proof runs the fuel mixes through a common test engine the results look promising.
He writes articles in many aeromodelling magazines.
Cheers
Allen
He writes articles in many aeromodelling magazines.
Cheers
Allen
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