Lanzo Stick 1940

[Anonymous]

I have just built one of these. It states that it flew on 32 strands of 3/16 rubber 40″ long and was braided.What are the pros and cons of doing this rather than more strands of 29″ (which is the distance from the front bobbin to the rear peg)
Here , in England, we are only allowed 100g rubber in vintage Wakefield. So,what is the best length to make up the motor to.
I have just experimented with 1/4″ rubber and end up with 20 strands of 29″

[RANDALL RYAN]

The advantage is a longer motor run. More strands and 29 inches will result in more torque at fewer turns.

[Anonymous]

This is the model.I flew it at Middle Wallop yesterday, and am very pleased with it.

[Anonymous]

Another view

[gos]

That’s very nice Doc, and pleased to hear it flies well for you.

I built one about 10 years ago, used the amount of rubber specified, but could never get it really going like I thought it should—ie. 180+ every time.
It also often broke when it ‘arrived’.
I felt it was too heavy with all that rubber in it. It’s been packed away for a long time, but one day I may try a 100gram X 16 strand Tan2 motor that goes into other things I have here.

Here’s a pic of my one—-such as it is, a bit sad and used looking.

[Anonymous]

I will put the fairing on the front of the wing mount when it is finally trimmed.I agree about the rubber.I started with 50grams, but it was not enough.I had a lesson in braiding at Middle Wallop and it now flies much better with 100g.
I also put a braided motor in my Senator and that is flying a lot longer.
I still have plenty to learn.The weather here has at last got a bit better.

[Anonymous]

@docjames wrote:

Here , in England, we are only allowed 100g rubber in vintage Wakefield. So,what is the best length to make up the motor to. I have just experimented with 1/4″ rubber and end up with 20 strands of 29″

Doc, This is an extract from my “Rara Avis” essay on this very subject.

“A useful approximation for calculating the unwound length of a Vintage
Wakefield motor is to multiply the distance between propeller hook and motor peg by
1.5. So! For the “New Look”, where hook-to-peg distance is approx 31″, a motor length
of 46″ is indicated (i.e.:- 31 X 1.5 = 46). The shorter hook-to-peg length of the “Voodoo”
requires a 36″ motor. The weight of rubber and the number of strands needed to power a
model efficiently is partly determined by the finished airframe weight”

You can access the whole essay in PDF format at this link.

http://www.vintagemodelairplane.com/pages/Downloads/CRB_Tasters/RaraAvis01.html

where you will find the whole Vintage Wakefield Rubber preparation, motor handling and winding process for your 100 grams of modern rubber described in the most minute detail, ending with this evocative description of a perfect flight.

“Our Vintage Wakefield leaps from the ground and screams silently upwards,
spiraling in right-handed flight, almost vertical for about 10 seconds; then, with climb
angle gradually reducing, continues inexorably upwards for another minute, maybe more,
to become a mere dot in the sky as the power of the rubber motor exhausts itself through
the 18″ diameter propeller, with blades large enough to veil a newborn babies’ arms! Now
the model airplane mutates into a soaring buzzard, wings outstretched, floating higher on
currents of warm air and would, if not checked, shortly meet the same God prayed to only
minutes earlier!.”

You may be interested in loads of other similar stuff on the website including my recollections of the 1066 Euro Vintage Champs at Middle Wallop in 2005.

[Anonymous]

Hi Ramon
I have perused you website several time.I have found it very informative.
Regards
jim

[Author]

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