FA C T S & TE C H N I C A L DA T A :
- RAVEN / Medway Microlights / design Roy Venton Walters
THE STAINLESS STEEL ENGINE MOUNT
The new engine mount (nick named Madonna). After months of struggling Eppo’s team still
did not manage to weld the stainless steel mount in such a manner that the bolt holes for the
engine would not twist out off place. In the end four oversized pieces of massive steel were
welded into the frame (see left photo) and milled level. After that, drilling the bolt holes in
the precise spot was as easy as pie. Eventually this solution came from Eppo himself and
was and was implemented ( free of charge) all through the night by Jan Dekker of Forto.
Trevor Barker, a former KLM employee re-welded the entire mount. What a first-class job!
In Ben Meelhuizen's hangar at Hilversum airfield the 80-hp 4 cylinder Limbach strung
up for a trial fitting in the new engine mount. The horizontal bars became the new
strengthened Seat Frame.
At last, the engine snugly fitted in its support frame. Yet to accomplish were the cooling
ducts and shrouds. The Limbach engine was not supposed to run above 195 Celsius.
The cooling ducts and shrouds were manufactured by Stephan Haak. Unfortunately the first
set (left) did not live up to its expectations during trial flights in the US. The second set (right)
functioned to perfection. The bottom ducts, because of their outward tapering shape create
a vacuum sucking the air through the cooling ribs. Once again a solution by Eppo.
DEVELOPING ADAPTATIONS TO THE EXISTING TRIKE FRAME:
Stephan Haak connects the hoof iron-shaped Reynolds-503 Seat Frame. It was a novelty
that is was attached underneath the Base Tube, in a bracket developed by Stephan at KLM.
(see left hand photo below)
The Base Tube bracket – Jan Dekker developed the foot- steering and throttle
The Seat Frame adhered to the fuselage with epoxy raisin and strips of Kevlar
To prevent cold air getting into the fuselage, the existing nose fork too had to be replaced by
the one on the right.
DEVELOPING THE FUSELAGE AND TRIKE ADAPTATIONS:
Eppo draws the 1/1 basic design for the fuselage in his living room.
The 1/1 final sketch of the fuselage and trike frame adaptations.
Franja Mora, a Yugoslav sculptor made the foam plug for the fuselage. Three months of
endless brainstorming, cutting and sanding resulted in a daily mountain of dust in Eppo’s
living room. But, in the end, it became an object of eye-catching beauty!
The new frame and a fibreglass mock-up of the fuselage
The Final Kevlar fuselage weighing 7 kilos. Next to it the 21 kilo fibreglass mock-up to
decide where to cut the holes in the original so as not to prematurely spoil it.
The fuselage attached to the trike frame. Yet to construct was the fuel tank, sculptured by
Gerard Engels out of a block of foam. Enveloped by fibreglass and epoxy raisin, once
hardened the foam was diluted with a strong solvent. Dolf Backer, also the manufacturer
of the fuselage could finish the job. (see photos below)
Dolf Backer: WWW.DUTCHCOMPOSITES.COM preparing the fuel tank plus its cover.
Glue the lid to the fuel tank, clamp it tight with some foam and planks,
wait for it to harden, and oopsy Daisy ready to go! Or so we thought!
First time filling her up? Leaking life a kitchen sieve. Dolf sped to a
scene of utter despair. Did he fix it? The fuel cap even got a lock.
The fuselage in its first coat of KLM primer.
DASHBOARD - NAVIGATION & MOTOR INSTRUMENTATION:
Instrument panel and Kayak enclosure – the two slits are for a knee map roller
o Dittle 720 channel VHF radio (sponsored)
o ADF (Automatic Direction Finder)
o LORAN-C (long range navigation)
o Air speed indicator
o Vertical airspeed indicator
o Turn and bank indicator
o Altmeter in millibar
o Altmeter in quick inches
o Knee map roller
o All instrumentation is secured by circuit breakers
o RPM + hour meter
o Oil pressure gage
o Oil temperature gage
o Cylinder head temperature gage
o Ampere gage
o Voltage gage
o Fuel flow gage
o Carburettor heater
o Foot throttle
o Hand throttle
o Spare throttle on a cord
o Starter lock
o Right magneto switch
o Left magneto switch
o Gyro compass *
o Transponder *
o DF * (Direction Finder) was sponsored by the
Icelandic company DNG
* The Transponder and Gyro compass were added in Iceland
MECHANISM TO MOUNT THE FLEXWING ONTO THE TRIKE:
When all was ready to put the wing for the first time onto the trike, quess what, the
nose of the trike was too long for the control bar of the A-frame to pass. Eppo came
up with this odd solution at the end of the afternoon. The very next morning it was
functional. Don’t ask how! It always took three people to put the wing onto the trike.
(see photos below)
First place the wing at one side of the trike – then place the Pylon Tube with the hinging ball joint in the engine mount – now just lift the
wing and gently let the Pylon Tube slide into the engine mount – then turn the wing into the direction of flight.
Don’t try this at home, especially not with the assistance of two over-enthusiastic tipsy fellows at 4 o’clock in the morning by the head-
lights of a car. This is what happened to Eppo flying from Dayton to Oshkosh just south of Chicago in 1987. All is well that ends well.
CLOTHING AND SURVIVAL GEAR:
· Silk head cap
· Helly Hansen head cap
· Neopreen head cap
· Silk ski mask
· Neopreen ski mask
· Helly Hansen turtle neck
· ALPHA Passenger helmet by HELMETS UK LTD. (sponsored)
· Helly Hansen polar underwear
· Helly Hansen polar overalls
· Silk socks
· Helly Hansen polar socks
· F-16 survival suit – (sponsored by Helly Hansen Netherlands)
· Eider down polar jacket
· Goretex wind breaker
· Moon boots
· Silk gloves
· Woollen gloves
· Helly Hansen polar mittens
· Neopreen windsurf gloves (for emergancy taped on top of the dashboard)
· Under arm military life vest (sponsored by INTAMAR LOGISTICS)
· Rubber Dinghy
· NATO ELT (emergency location transmitter) (sponsored by Mr. Tönis RADIO HOLLAND)
· Two GO-PLANE 100% Kevlar, carbon fibre reinforced floats / 39.6 lbs. each
· Drinking water
· Emergency food rations
· Sea sick tablets
· Sleeping tablets
· Smoke flares
· Night time flares
· Signalling mirror
· First Aid kit
· Insulating foil
· Survival knife
· Fire making equipment
· Fishing tackle
· Sewing gear
· Black fly lotion
· . . . etc.
· Spare parts
· Basic tools
· . . . etc.
· Limited leisure clothing
· . . . etc.
THE FRENCH REGISTRATION – THIS IS HOW IT WAS MAILED
What an absolute feast to receive ones registration mailed in this manner. Eppo: “All
these years I have treasured it like a valuable collectable!” Concerning and considering
the enormous hassle it took to get a registration at all, please read below.
During the first meeting with the Dutch CAA (FAA) about the adaptations for his Atlantic ultralight it was agreed, quote: “if the English manufacturer would agree to these changes, then, as far as they were concerned they saw no problems in supplying Eppo’s craft with a Dutch registration.
The English manufacturer Roy Venton Walters and former BOEING aircraft engineer Nout van Rooy got to work. Roy even, on Eppo’s request and cost travelled all the way to Holland. Extensive reports were made and typed out all through the weekend and all throughout the night as well, thanks to Patricia Rens.
Unfortunately, at the time the Dutch Civil Aviation Authorities did not have the capacity to handle his two-volume rapport. Considering the ample time left, it forced Eppo to seek sanctuary at a local flying club in Maintenon France. Thanks to their efforts, Eppo got his necessary registration.
“Yves Berger, Bernard et Janinne Hariscain, my sincerest gratitude”
However it did force him to take all his practical and theoretical exams all over again. In French at that!
16-6-’89 Rotterdam Airport - Lydd UK : 310 km - 2.56 hrs.
16-6-’89 Lydd - Biggin Hill : 78 km - 0.58 hrs.
18-6-’89 Biggin Hill - Stoke Kent : 45 km - 1.02 hrs.
25-6-’89 Stoke - RAF Oakley :130 km - 1.51 hrs.
26-6-’89 Wescott - Hinton in the Hedges : 30 km - 0.22 hrs.
27-6-’89 Hinton in the Hedges -
05-7-’89 Glen Forsa Mull - Stornoway : 218 km - 2.01 hrs.
01-8-’89 Stornoway - Sorväg Faroer : 438 km - 5.47 hrs.
07-8-‘89 Sorväg Faroer - Egilsstadir Iceland : 503 km - 5.11 hrs.
09-8-‘89 Egilsstadir - Reykjavik : 401 km - 4.26 hrs.
22-6-‘90 Reykjavik - Kulusuuk Greenland : 736 km - 6.58 hrs.
26-6-‘90 Kulusuuk - Sondrestromfjord : 645 km - 7.09 hrs.
01-7-’90 Sondrestromfjord -
07-7-’90 Iqualuit - Quaqtaq : 306 km - 5.55 hrs.
08-7-’90 Quaqtaq - Kuujjuaq : 389 km - 4.10 hrs.
15-7-’90 Kuujjuuaq - Shefferville : 394 km - 4.28 hrs.
15-7-’90 Shefferville - Wabush : 223 km - 2.32 hrs.
18-7-’90 Wabush - Sept-Iles : 310 km - 2.50 hrs.
21-7-’90 Sept-Iles -
03-8-’90 Miller Field Park -
Total air time
Distances over open water
: 5092 miles
: 95.38 hrs.
After so many years the possibility exists that I may have overlooked mentioning a
certain person or company. If this is the case, to all of you who are not on this list
you should have been! My humble apologies to have forgotten you!
Rob van Oordt
Eveline Louis ***
Wim van de Hoek
Arie (de) Jager
EMERY WORLD WIDE
Muriel Landberg ***
TWO YEARS FREE HANGAR SPACE
Ben Meelhuizen ***
Dolf Backer www.doubledutch.eu
Hans de Graaf
INSTALATION OF THE NAVIGATION EQUIPMENT
Nout van Rooy
Roy Venton Walters
Her Majesty Queen Beatrix
Nils Gislason Developed and build the Direction Finder - It saved Eppo’s life!
Mary Bogumill ***
Ron Manneman ***
Mike Bogumill ***
Jane Manneman ***
Mary Jones ***
Erica de Wit ***
Henk Stam ***
Dennis Darrach ***
Aad de Bruin / Loran-C ***
Lily van Oyen
Hennie Dulfer Vos
Bernard en Janinne Hariscain
Equity & Law
Leonard Harbrink Numan
Onni de Jonge
STAFF AND GROUND PERSONEL OF THE FOLLOWING AIRFIELDS
Dayton International *
Randolph County Winchester IN
Fulton County Rochester IN
Andy Barnhart Memorial - New
Linden New Jersey
Biggin Hill *
Stoke airfield *
Hinton in the Hedges *
Glen Forsa Mull
Sept - Iles
Santa Fé *
Boregopass road *
Crestone (abandoned) *
Lay out and text © Eppo Harbrink Numan 2007 - Website construction and hosting Richard Bakker AHCS