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Verner Anounced suspensoin of production for 3V and 5V radials

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pictsidhe

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Dollars to Donuts that the Polini powered Skylite meets 103 weight a LOT easier and with a lot less structural tomfoolery than the half VW.

NO OFFENSE or disrespect to Mr. Casler or what he provides.
I have a vague memory of Ed Fisher saying that to meet 103, nothing heavier than a 277 can be used on a Skylite. That puts a 1/2 VW right out.
 

addicted2climbing

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I have a vague memory of Ed Fisher saying that to meet 103, nothing heavier than a 277 can be used on a Skylite. That puts a 1/2 VW right out.
Yes this is what Ed told me as well. However the Verner would have made it since the cowl, nosebowl and heavy exhaust could have been eliminated. Also would have made a few other substitutions to cut weight just in case.
 

Bille Floyd

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Unfortunately, the 3V was over $9k. That's a lot for an ultralight engine.
Now I'm going to be pondering how to build a radial from Honda cylinders and a generator crank.
This 5 Cylinder radial, uses Honda parts. It puts out 25hp, and weighs
in at near 11.8kg ; if your building one, then i could use 30hp, and
keep it in the same weight-range please !! --- :)
And an EFI , with a Max rpm of 3k, would also be Nice.


Bille
 
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addicted2climbing

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This 5 Cylinder radial, uses Honda parts. It puts out 25hp, and weighs
in at near 11.8kg ; if your building one, then i could use 30hp, and
keep it in the same weight-range please !! --- :)
And an EFI , with a Max rpm of 3k, would also be Nice.


Bille
Bille,
If I could run that as a pusher it might work well enough to replace my Vitorazi 190 on my Zigolo. However, I bet the engine is not designed for running for 1hr continuously. No starter either... But still interesting nonetheless.
 

cluttonfred

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I would be very tempted to try that tiny radial (17" diameter, 42" max prop size!) on something reminiscent of the Lympne light aeroplane trials of the 1920s. Think Avro 558, Gloster Gannet, or DH Hummingbird.... Light weight, lots of wing area, just putting around on a summer evening, goggles and scarf required!

avro 558.jpg gannet.png dh53 bw.jpg
 

Bille Floyd

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Bille,
If I could run that as a pusher it might work well enough to replace my Vitorazi 190 on my Zigolo. However, I bet the engine is not designed for running for 1hr continuously. No starter either... But still interesting nonetheless.
Your V-190 is cranking out 7500 rpm , from a 2-stroke ; or
have a radial 4-stroke, turning 4000 rpm ... ...
which one should last longer ?
I would be OK with a belt reduction ; make a Bigger prop, go 2300 rpm.

My Atos will only need , (23Lb of thrust) for level flight ; the glider gets a 19:1 L/D.
Only real problem with that radial for me is, at 5500-ASL ; the takeoff is
gonna need all that 25-hp , for a decent climb rate, (30hp would be safer).

Bille
 
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GeeZee

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Ok that’s just crazy. A 60% scale stearman is as big as a Hatz. With regards to the 7cyl radial what’s the catch? 45hp, 61lbs under 10k$. Seems like quite a bargain as far as aircraft engines go. Watched the video. Looks like open rocker boxes and exposed pushrods? Hope I’m wrong. That engine could easily replace a Verner 3 cyl If it has a decent TBO and reliability.
 

Vigilant1

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. With regards to the 7cyl radial what’s the catch? 45hp, 61lbs under 10k$. Seems like quite a bargain as far as aircraft engines go. Watched the video. Looks like open rocker boxes and exposed pushrods? Hope I’m wrong. That engine could easily replace a Verner 3 cyl If it has a decent TBO and reliability.
The weight isn't clear on the factory spec page. "Product weight" is listed as 35 kg (77 lbs). 45 hp from a 4 stroke air cooled 800cc engine at 3800 rpm is .. . ummm, well, maybe it is just intended as an estimate. They are recommending high octane fuel, so maybe they are running high CR and getting high specific power, but that won't fix the heat issue. I'd wonder about the CHTs in continuous use, and overall expected reliability.
The engine sound and look is very nice.
 
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blane.c

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Videos VM R5-420


Specifications:
  • Cylinder: 5
  • Displacement: 420 cc
  • Output: ca. 25 hp
  • Bore: 47 mm
  • Stroke: 48.5 mm
  • Diameter: 425 mm
  • Length from engine mount to prop hub: 255 mm
  • Weight: 11.8 kg
  • Ignition voltage range: 6 - 9 V
  • Idle RPM: 800
  • Max RPM: 4500
  • Propeller size:
  • Fiala Prop 2-Blade: 38x24" to 42x20"
  • Fiala Prop 3-Blade: 36x24" to 40x18"

With 20" pitch prop max speed no slip 85 mph, figuring 85% efficiency 72mph@4500rpm
With 24" pitch prop 85% is 87mph@4500rpm
If of course you could get 4500rpm.
 

GeeZee

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“They are recommending high octane fuel, so maybe they are running high CR and getting high specific power, but that won't fix the heat issue. I'd wonder about the CHTs in continuous use, and overall expected reliability.”




Agree. Wonder what kind of a “nudge” it would take to get them to make a version more suited the EAB market.
 

Bille Floyd

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...
I'd wonder about the CHTs in continuous use, and overall expected reliability.”
...
Parts availability , would be my main concern ; how long is this
company gonna stay in business , because i'm going to need
the rebuild, the moment they fold ! :(

I'm actually leaning towards buying a 2011 or newer KX250F
dirt bike ; then cutting the engine trani off , and make a belt reduction.
I already know that a total rebuild in parts is gonna cost me under $1k.
If it worked : now i have a 4-stroke that makes near 40Hp, and i
only need 30hp of that, and they toss in a dual EFI that's proven.
It's Tempting ...

I wonder how much weight i'd save ; by dicing off the transmission on
that engine ?

Bille
 

pictsidhe

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Parts availability , would be my main concern ; how long is this
company gonna stay in business , because i'm going to need
the rebuild, the moment they fold ! :(

I'm actually leaning towards buying a 2011 or newer KX250F
dirt bike ; then cutting the engine trani off , and make a belt reduction.
I already know that a total rebuild in parts is gonna cost me under $1k.
If it worked : now i have a 4-stroke that makes near 40Hp, and i
only need 30hp of that, and they toss in a dual EFI that's proven.
It's Tempting ...

I wonder how much weight i'd save ; by dicing off the transmission on
that engine ?

Bille
Dana was flying a paramotor with a converted KX100. He adapted the stock transmission. I believe he replaced the clutch with a TV damper of some kind.
 
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