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Post  ian1954 Fri Dec 12, 2014 6:22 pm

Here we have some more Ronald Valentine diesels. The are also sometimes referred to as Rasant - Fast and Furious.

This is one of the prototypes of the 0.098 cc series. It is similar in appearance to the Super Bee and the Mini Bee.

ROVA (Rasant) Diesels 0.098cc Rova_m10
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Post  ian1954 Fri Dec 12, 2014 6:23 pm

Then we have the ROVA Rasant MkI prototype that displays the ROVA build that followed.

This engine was manufactured from bar stock. Cylinder, spinner, back plate and drive washer were anodized in dark blue.

ROVA (Rasant) Diesels 0.098cc Rova0_10

Bore                          5.0 mm
Stroke                       5.0 mm
Rpm                         18,100 rpm
Total combustion       0.098 cc
Weight                      15 gram
Intake                      Front Rotor
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Post  ian1954 Fri Dec 12, 2014 6:23 pm

Ronald produced a "Plexiglass" version for exhibition. He also ran it!. I wouldn't dare.

It is a little difficult to photograph to best advantage.

ROVA (Rasant) Diesels 0.098cc Rova_m11

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Post  ian1954 Fri Dec 12, 2014 6:24 pm

Then along came the MkII ROVA Rasant

The engine crank case was manufactured from bar stock and sand blasted.

ROVA (Rasant) Diesels 0.098cc Rova_r10

Bore 5.0 mm
Stroke 5.0 mm
Rpm 18,100 rpm
Total combustion 0.098 ccm
Weight 15 gram
Intake Front Rotor
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Post  ian1954 Fri Dec 12, 2014 6:25 pm

After the Mk II came the Mk III and this was followed by Schneurle ported versions.

This is the prototype

ROVA (Rasant) Diesels 0.098cc Rova_s10
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Post  ian1954 Fri Dec 12, 2014 6:26 pm

The ROVA Rasant 0.098 cc MkIV diesel engine. The engine is Schnuerle ported and the bar stock crank case is anodized in blue. The engine is more powerful than the normal ported ROVAs

ROVA (Rasant) Diesels 0.098cc Rova_s11

Bore                        5.0 mm
Stroke                     5.0 mm
Rpm                       24,800 rpm
Total combustion   0.098 cc
Weight                   15 gram
Intake                    Front Rotor
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Post  ian1954 Fri Dec 12, 2014 6:26 pm

Now the MkV. Next to the Schnuerle porting the bar stock crank case and carburetor was anodized in blue.

ROVA (Rasant) Diesels 0.098cc Rova_s12

Bore 5.0 mm
Stroke 5.0 mm
Rpm 2 4,100 rpm
Total combustion 0.098 cc
Weight 15 gram
Intake Front Rotor
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Post  getback Sat Dec 13, 2014 6:55 am

Nice ! Ian1954 you never sease to amaze . Did you meet Ronald Valentine at one point ? Really enjoy see your treasures , Thanks Eric Santa
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Post  ian1954 Mon Dec 15, 2014 4:54 pm

getback wrote:Nice ! Ian1954 you never sease to amaze . Did you meet Ronald Valentine at one point ? Really enjoy see your treasures , Thanks Eric Santa    

We are in contact by email and phone but distance prevents meeting. I have met quite a few engine builders over the years but no one can match the speed and accuracy of Ronald productions. Believe me, just when you think he has reached a model engine engineering limit - he surpasses it!!

When you see the Nano Bee in the below video - the smallest diesel in the world! - after this he went on to produce a vertical twin Nano Bee, then (what I thought was impossible!) a flat twin Nano Bee - I gave up thinking there was a limit!

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Post  getback Mon Dec 15, 2014 5:16 pm

Thanks Ian , I haven't seen the twin Nano before , very impressive he must have very good eyesight !! And a hell of a engineer !! I don't OWN one but maybe some day Rudolph Eric
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Post  ian1954 Mon Dec 15, 2014 6:08 pm

getback wrote:Thanks Ian , I haven't seen the twin Nano before , very impressive he must have very good eyesight !! And a hell of a engineer !! I don't OWN one but maybe some day Rudolph  Eric

https://www.coxengineforum.com/t6764-tiny-valentines-0-06-cc


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