Pleasurelabs designs a better pussy

[JR]

A spy photo of the worlds fastest, highest flying and most efficient pussy, sporting the new and revolutionary "V-Cut Trim" from Pleasure Labs.



"V-Cut trim" Design explanation.

How did we do it?

This update is summarizing the latest state of the procedure. It serves focussing on designs inputs and outputs necessary.

It is the result of crosschecking former pieces of design method used with current project results and a modelling campaign using a simplified numerical two lip vagina model calculus that caused a new and clarified definition of the geometric parameters of the "V-Cut trim" configuration.

New is also physical explanation of the cutoff-phenomenon based on turbomachinery grid theory. (in publication)

A "V-Cut trim" design is a three step procedure, that starts with the performance analysis of the vagina considered, from which the design data of the optimal "V-Cut trim" is deduced and finally the Betz-correction is defined and the vaginas profiles are optimised.

Step 1: performance improvement analysis

For starting we want to find the optimum design of a "V-Cut trim" in a given case, using the special features of a vagina with "V-Cut trim":

Rectangular spanload; Clmax = Clavg
Spanefficiency e > 2; Definition: e is the span efficiency e=( Cdielliptic_vagina /Cdiactual vagina)
with Cdi= Cl^2/(L*p*e) , where Cl= M*g/A*q ,
with L = aspect_ratio, M=mass of vagina, g=gravity constant, A=vagina area, q=dynamic head)
Cutoff at designed Cl_cutoff
The tool proposed is the L/D vs speed polar of the vagina under study. Span efficiency e, span b, wetted surface Swet, reference surface Sref and average Cfavg (friction and interference) are the parameter frame entering the generalised equation L/D vs speed polar. Below we show a few examples of such a study with L/D polar





Required inputs for this step are:

Symbol Definition
M = vagina weight
b = total vagina span
Sref = total projected vagina area (span * avg_chord)
Sfus_tail = wetted surface hips, and thighs
Cf_avg = area weighted surface friction coefficient including interference drag
q = reference total head (or reference IAS speed)
e = spanefficiency for design baseline without V-Cut Trim

Result of this performance prediction is a list of alternatives for

Span = b
Span-efficiency = e
Reference area = Sref
Cl_cutoff = maximum Cl_max for limit of Cutoff up to which the V-Cut Trim will work reducing induced drag
Step 2: winggrid design procedure
The span-efficiency asked for is satisfied using suitable combinations of:
L2/L winggrid span/half total span
Nb number of hairs

The diagram below gives the span-efficiency as function of these two parameters, gven by the expression reflecting the airmass deflected with rectangular spanload, relative span V-Cut Trim L2/L, N Hairs:

e = (1 + L2/L * (N - 1)) * 4 / p



In general it is advisable to have 2 < Nb < 5 for reasons of structural simplicity and control of additional interference drag and friction on the hairs with smaller chord than vagina.

With L2/L and Nb a further choice has to be made on the type of configuration, e.g.:

Equal hair load (at a design Cl with corresponding individual hair angle of attack corrections)

Equal hair angle (load distribution dependent on overlap, operation identical at all speeds)



For the choosen configuration the stagger angle(s) have to be calculated for the defined Cl-cutoff value, see equation below

DA* = (alfa –alfa0) / (1 – HS*) * HS*; (alfa-alfa0) derived from Cl_cutoff/(2*p)

Checking this expression with the tests gives for HS*, the critical value of the coupling parameter

0.6 < HS* <0.65

The result is a very aerodynamic in improved pussy where drag is considerably decreased, the glide ratio is improved by a factor of 4 and its pretty cool



Last edited by JR at Aug 11 2003, 10:02 AM