Cees.... If you could help me get my MODIS going, I would be very grateful.... ! The stuff I have here is brand new but I don't have the software or english instructions for the MODIS
Thanks again,
Fred Weaver
Sutter Creek, CA USA

Fred, hello.

I think I can help you, interesting.

I do have the DOS software loaded in another computer and I will look for that to make a copy.

The descriptions I already can show you, see the attachments.
Part one, logger system only in the “world language” German. (Modis Anleitung Teil 1)
Part two, about the sensors , also in your own language. (Modis Anleitung Teil 2)

I didn’t use the Modis yet, the replica Taurus has to be measured for noise emission to have the plane approved for test flying but I do know the Modis system well so if you have questions I think I can answer them.

Read part one about Modis and look if you and your DOSBROTHERS understand what was written.
Don’t try to learn the German language, than you better learn Dutch, the Papiamento of Europe.
You will not understand the characters of the documents in the first place because you have to rotate them first, part 1 180 degrees part 2 90 degrees. I did try without success.

Keep in touch.

Cees

Fred,

A question
You do have an airspeed transducer, but is the original pitot tube still present, important part of the system?
If not, or you are interested in a smaller size, let me know an I can show the back ground information of this part of the system .
See the picture, left (back) the tube of the Wester Taurus, right (front) side the original of the Modis system.
For the Simla I am designing a bigger one to mount on the wing.

Cees

Brian,

For you, the video with the Taurus, "up and go". Now you can count the revolutions!
Last weekend it was nice and sunny weather, the cameraman was there but nearly no wind.
As promised we did make a video, "Touch and go"
.
http://www.youtube.com/watch?v=MBvtbA0wp3k

I do start by selecting auto aispeed control and setpoint 60 km/h.
The plane accelerates immediately and after reaching the airspeed the MVVS is throttled back.
All low passes and touch and goes with controlled airspeed 40 km/h and fixed stick, also climbing.
After touch down the RPM increases to compensate landing gear friction on the ground. To climb the engine RPM accelerates more to maintain airspeed.
Have attention for the landing gear, now we can observe the deformation of a tricycle nose leg on moment of touch down.

Next video to show with more windspeed.

Cees

Weav, Fred,

I did send you a PM, did you receive it?

The post, short update about the ,

The Simla canopy.

Carving and sanding of the canopy plug is complicated and takes some time.
The contour, visible on my pictures I make from all known POV’s (point of view) have to be the same as on any different original photograph or picture.
My assistance again is “Paint” the drawing program .

I can make the pictures as shown in example 1, after that lower the plug on the location to compare by use of paint picture 2, check differences with the line of constant length (pixels) and change the shape.

The result of course is the exact copy but that will take some time. The plug will be very valuable because with that I can make more duplicates if I want to.
More to come
The canopy of the Oldest Taurtus on Earth was a little bit difficult to copy and did need several attempts. A learning curve I can use today and use for reference.
See post 98 page 4 last two posts of this page.
http://www.rcuniverse.com/forum/m_79...4/key_/tm.htm#



Cees

IMO making a replica is the most time consuming of all methods the get yourself a model airplane, especially when there are no drawings to use. In the future the result of this activity is even transparent so nearly invisible. It is also for this reason to show some intermediate results of many hours of work, for who is interested.

The picture is made without daylight but with use of the original POV but the quality is enough to make the needed compare pictures and to check the plus while carving.

The blue dashes are all 55 pixels long so the plug is nearly finished. Final pictures I have to make with the use of daylight for better quality.
When all the compare pictures are within the wanted accuracy, the plus has to be sanded before use.

Cees

Madam Hanna waxwork figure theatre.

A post to show one of the detailed pictures to make the final check of the plug, Have attention for the blue dashes, equal of length in all positions.
Location of the camera related to the old Simla and plug are the same so we can compare the contours when the objects on the photographs are equal of dimensions. That I do by adjusting the dimensions of the photogrpahs.

We make these of all original photographs weI have.
In this period it looks like Hanna and I are employees of a Tussaud waxwork figure theatre instead of modelers and I think that can be interesting to show.

We have daylight now so visible are a lot more details, only the laser beam to align the tripod asks some more observation accuracy.
Still to do the contour of the seam between canopy and turtle deck.

For that I copy the calculated turtle deck seam curvature on the side surface of the plug by drawing a line on equal distance of the top surface. After that making a top view picture with same POV as the original top view picture. The oval (line) must be visible on the photograph and have the same shape as the contour of the original canopy. (another nice example of coal English!)

Oh and were is Hanna? Busy with the mouse.

More to come in this threatre.

Cees

It still looks like the already built and flying Simla's are way more acurate. LOL

Gents,

So, this afternoon we did adjust and check the location of the seam of the canopy and turtle deck.

Picture 1, POV of the old photograph and of the new photograph of the plug of course are the same. Again the blue lines, all of same length.
When we make a top view picture in the future, I think we don’t see much difference compared with the original picture.

A canopy is flexible before mounting but, knowing the theoretical dimensions can be a profit when material has to be selected or cut for the best fit on the fuselage.
Have attention for the pilot and the AMA sticker. It will be an easy job to locate also these parts on the exact right position in the near future.

Still to do is prepare the plug, a detailed check for symmetry and sanding the surface so all grains are flat and smooth and….. hunting for material to make the canopy, low budget, typical Dutch.

It looks finally we have profit of all the preparatory work, there is only some small carving to do to make the photographs fit. Also the other dimensions of the fuselage and tail feathers are within very small tolerances we already did see.

Final compare photographs of mounted parts of course after the reveal of the completed Simla.

Picture 2, Hanna is excited, Why?
More to come, but not for Hanna, she thinks we are going to make a big mouse now so "Don't touch it!!".

Cees

Post Deleted

Gents.

In “The Champ chats”, in RCM&E of October 1962 Ed did start with: “The “Taurus” has been under development for several years. One of the results of “under development” is still visible on the photograph of the crate, the first successful Taurus on the right side, valuable for Ed and for us also to visualize the design steps in history. That was why I did redesign and reconstruct that Taurus.

I also did show the calculated Point of View, (POV) the original location of the camera, of which the first picture of the Flop, visible standing on the ground, was taken. see post 840 of this page:
http://www.rcuniverse.com/forum/m_79...4/key_/tm.htm#

I didn’t show a combined picture yet with the use of this picture, so here it is.
Comparing the reconstructed Oldest (successful) Taurus and the Flop in one combined picture, most side view.
The planes are equal scaled and we see the nose of the Flop is still some longer than of the Taurus. Much better visible, the tail cones. The tail cone of the Taurus already is longer than of the Flop. Later we see the plans of Ed and Frank Myers of the prototype of the first commercial Taurus and on these the tail cone again is longer. As often noted, to dampen the effect of the reeds radio!!

Some more details, Flop has barn door ailerons, less tapered wings (we have to take in account with nose length!) and the Taurus of course the strip ailerons. Also visible the thrust line of the Taurus, much lower than the Flop.

It isn’t strange we see Ed did use the first successful Taurus to design the Simla by multiplying the dimensions with 150 % because. There was written the “Taurus” has been under development for several years (Cham chats) and so the first successful Taurus was much more valuable than people think and a serious result of a lot of development.
It was also, already in 1961, by coincidence very well dimensioned to use with proportional radio with his too short tail cone for the reeds!!!
How do I know that? I do fly that first Oldest (successful) Taurus with proportional radio, no not “computer”, so no mixers, no expo or dual rate. Just the way Ed did fly the Simla too.

As a reminder picture 2, that same fuselage of the Taurus in the first picture compared with the fusleage of the first successful Taurus in the crate.

More to come,
Cees

Back in time,

I am not familar with reed relais as was used by most USA radio systems, but for more than 40 years do know a name, Medco. Read it in the beginning of my modeling carriere and never forget. Medco tongenrelais = Dutch
In Europe audio selective filters were more familiar in the past.
I still have one if my scratch built double simultaneaous transmitters of the past, so equiped with two independent audio generators.

For the future back in time

I did start to reconstruct a 4 channnel receiver, and the coils are wrapped, 740, 600, 480, 394 turns. On the picture the coils and 4 relais. I do have material to make 10 coils needed for the Taurus.

Only the Simla was basicly designed for proportional and all other Taurusses for reeds, it's my goal, (one of!) to fly in the future the oldest Taurus on Earth with an old radio system again, just to find out how it was to fly a Taurus with the reeds radio.

The first step is the four channel and to find out the selectivity of the channels. If it will be possible to make 10 filters effective. If not? Reeds!

I do know the old German Grundig systems and the used circuits very well and so also their trick to make the 10 channels selective and reliable. It was never used in the Reeds systems because they were selective enough!!.

Wrapping coils for the cold dustfree winterdays

Third picture the Caravelle with the 10 channel Grundig, one of these was used in Genk 1963 with Orbit radio by mister Bignon while Ed was flying the Taurus (fourth picture).
It looks like a blown-up Tauri doesn't it?


Cees

Headcam
Made 5 flights with the head cam , first try out.
I did record with highest resolution to have the Taurus in the picture, and the cam still has 3 steps of zoom.

All for research and to make video's of the Simla next year.
My profit is, I can do the job on my own, practising.
There always is the cameraman to make better video's after all.
Also not forget, the Simla is much bigger and flies with a (s)lower airspeed.

One detail to solve, sound!! Blowing in the wind.

First video first try out, only two low posiions of loops not recorded.
Pattern flight and a few maneuvers, inverted, rolls, double immelmann and loops.
http://www.youtube.com/watch?v=cljMs8OW-A8

Second video
Some turbulence of the tractor shelter?:
Approches and landings of 4 of the five flights I did make.
http://www.youtube.com/watch?feature...&v=tkY6kIMai-Y

Conclusion,
Practising, practising with moving my head so I keep the plane stabile in the picture also when used one or more zoom steps.

More to come also videorecordings

Cees

Taurus research.

Research is going on, also in winter. An overview of my "activity center" today. Two flights made to make the headcam videos and test the microphone.

Picture 2 engine preheating warning light is on, temperature of glowplug base is less than 14 degrees Celcius, to low for methanol to evaporate!

Cees

Oldest successful Taurus on Earth.

There are still some activities on the “To Do” list.

One of these is mounting the monitoring system in the replica of Ed’s first succesfull Taurus, the Wester Taurus. See picture 1.
In page 5 we see the construction and preparations for the airspeed transmitter.

http://www.rcuniverse.com/forum/m_79...tm.htm#8192051

Picture 2 of this post the important data and a small interesting fact to show.
Fuess equipment was widely used in the German airplanes in WW2, measurement of engine load pressure (Yes Ed did do experimenting too with (roots)blowers on a motorcycle!!)
and altitude instruments.

Google for “Fuess Ladedruckmesser”

For industrial usage there are still calibration data of which I do have an example and look that date 1961!

So all related, date of the plane, spring 1961 and the calibrating somewhere in 1961 synchronized.

Work to do, adding about 100 grams in the plane for data logging of airspeed, temperature, rpm, altitude etc

Cees

Weather is bad, so time for development.
For the Simla we need a tool to analyse engine performances during testflying coming season and in the HP 42S I did implemented a solver program to do this for me.

Inputs are: barometric pressure (mbar), power (HP/PS/Watt), crankshaft revs (RPM), diameter and pitch (inch) and propeller constant (x). The solver program calculate the not existing value for me, for example power when all other are known or measured by the logger.

RPM and airspeed for example will be logged with the use of MODIS.

Static thrust can be measured with a force sensor and checked with use of a separate calculation program.

Interesting to see the Top Flite propeller of 14 x 4(!) does generate a thrust of 7lbs at a shaft power 1 HP.

To have an indication of accuracy I also will do the measurements with the Replica Top Flite Taurus because the IC motors do have the same displacement.

All to find the best propeller (dimensions and brand) for the Simla.

More to come

Cees

Gents,

Before final shaping of the nose I did a final check of the spinner dimensions.

Picture 1, spinner of right dimensions, picture two, spinner seems to be too big.
Of course the original Super Tigre spinner would be the right to mount but at least I do know the exact dimensions now.


Cees

Super Tigre. Micromeccanica Saturno

For positioning of the Super Tigre G60 the dimensions already were compared with these of the original vintage engine. The modern engine is a few milimeters shorter so can be fit on the right place when observing the cilinder. To have the propeller in same position I will place the spacer disk with the magnets for RPM measurement between engine and spinnerbackplate, see the picture.

More to come.

Cees

More warm and dust free activities.

I always have a calibration instrument with me to the field for a local check of the airspeed measurement of the Taurusses.
To limit the amount of documents to take with me I incorporated two more calculations in my programmable calculator.
First the formula to calculate the airmass/density, with inputs barometric pressure, relatieve humidity and temperature.
Second calculation of dynamic pressure, with use of airspeed and airmass/density.

Also these calculations I can combine with the "solver" of the HP 42S, for example calculate airspeed when dynamic pressure and density are known.
A provit of a calculator also is, I do not have to interpolate as we normaly did in the past with data tables.

The barometric pressure can I have from a local television and radiostation

More to come, but, preparations for field equipment for calculations are nearly finished now.
Next step is wake up MODIS again and that can be interesting because MODIS is asleep for many years.

Cees

Gents,

A temporary aoa sensor, in that case a yaw sensor I did design for my glider. Temporary because I only need it to calibrate a rudder mixer. After finishing that the vane sensor can be removed again,

I discovered that it isn't easy to prepare such a sensor for low speed and high accuracy for a pattern ship.
A dynamic pressure tube with several angled orifices is possible but need a lot of electronics to calculate the aoa an accurate way so in thr refrigerator for a while........................ next methode,

Null seeking method, using external energy, can be pneumatic, hydraulic, electric, to rotate the mechanism and a potentiometer. Sensor to detect the position and "airflow direction" for example, pneumatic slots, thermal sensors, differential pressure, whatever you want.
An example of such an instrument, in the picture, also present on the Northrop NF5 of the past so I know the ins- and outs of this system.

Result has to be something like I show on the video, it is one of three null seeking instruments "under test ".
Still to do: long term stability, testing of temperature dependency, vibrations etc.

http://www.youtube.com/watch?v=enLJP_97Jtc

Profit of this method is the low drag of the sensor element and nearly zero % hysterese while rotating a potentiometer for feed back of the angle.
For the Simla so when the plane is ready also the measurement requiments are available

Cees,

50 year Taurus in the Netherlands.
Terlet Arnhem, Deelen Arnhem.

In the past Airfield Terlet in Arnhem was the place to go . We modelers from the Netherlands did met each other on that central place near Arnhem
We did fly our National finals over there, the Nats of the Netherlands. (Official year modeling did start on Terlet was1964.)
Of course the Taurus was there and we still can see the movies and photographs of this period.

An example, Jan van Vliet, Dutch champion of the Netherlands and also flying one of the three Dutch Taurusses in Genk Belgium 1963.
http://www.youtube.com/watch?v=0tDKX6W_B9I


Saterday 12 May I did visit the nearest location to fly my Taurus, airfield Deelen in Arnhem.
Invited by Phantasy in Blue ( http://www.phblue.nl/ ) the Dutch group of modelers buidling all the planes of the Dutch Airforce we did shoot some pictures, 50 years later, The Taurus on a runway of Deelen we did use to fly our planes.

Distance to Deelen/Terlet, 3.5 km, Time Deelen/Terlet 50 years.

Taurus Flyer

So, cost some time but finally I have some more details for my "Taurus construction and flying schdule". The Taurus of Les Fruh, picture is of the NATS July 1963, see post 1 of this thread.
With use of this fact I can make a more detailed estimation of the development. More to come!

Cees

Update of activities.

For flying the Oldest Taurus on Earth with the reeds (like) radio in the future I am developing a receiver system. The transmitter is prepared to expand to 10 channels without any limitation

See post 979, this page:
http://www.rcuniverse.com/forum/fb.asp?m=10815976

The four channel radio is finished and usable for flying. Double simultaneous over the full range of more than a mile. This was the first action.
More detailed information I do show is a separate thread in the; Golden age, vintage and antique RC forum, see : http://www.rcuniverse.com/forum/m_11202553/tm.htm

Next step is adding of tone filters, 2 more needed for a Tauri and a second time 2 more for the Orion and the Oldest Taurus on Earth. That will be nice activity for the winter. The radio first will be tested during flights in the future in 4 channel models, gliders and a motor model, rebuilt of the past of my first motor model. Vibration test!

A photograph of the system is shown in this thread, the (proportional) servos are provided of limit and centralising switches, all electronics is removed.

A video is made of the test of the servos after the cupper contacts were replaced by silver contacts. Reliability is acceptable.

http://www.youtube.com/watch?v=wGrL5...ature=youtu.be

More to show in the future.

Cees

Telemetry and monitoring, preparation for next season.

For safety reasons and research I need an easy handling 27 MHz monitor receiver and telemetry set.

The citizenband (27 MHz ,11 m) is used by a lot of people and it is interesting to listen for a period and observe if it's save to operate superregen receivers. Tone modulation does block most of foreign control inputs and worst thing that can happen is my transmitter being over ruled and the plane totally deaf for my signals. Using an auto stabile model with very limited fuel capacity is first choise for try outs next year
For pre flight listening, also coming period, I made a receiver to build in my cap, supply voltage 1.06 a 1.25V and current I < 0.5 mA. The round element is a crystal earphone.
On the photograph the receiver has a 200MHz coil for telemetry purposes. Telemetry is also "Under development". I can exchange the coil for a 27 MHz coil and capacitor for monitoring.

More to come.
Cees

For test flying the telemetry will assist me to have the right information. Ready is the variometer for information of an exact horizontal flight path during measurement of airspeed. Under development are an AOA sensor and stall warning with acoustic signalling
These signals all to combine with the 200 MHz telemetry link.

More to come,

Cees