Phi Rhondo

Description

RONDO Technical Features

With 58 cells, mini-ribs and aspect ratio of 5.7, the RONDO is high end B.

But beyond that, we have developed new technology around NITINOL rods!
The new neoprene padding on the leading edge distributes the pressure of the Nitinol rods over a larger area and makes the wing nose significantly more robust against abrasion.
Nitinol in general is offering very easy packing and low stress by being very form stable. Of course the takeoff behavior is outstanding: a must have for a modern biplace wing.

The RONDO is using a new type of “double reef” brake system. Never ever the brake pressure on a tandem was that low, with still having full feedback and control!

On top of the “TO DO” list was “low weight”: we introduced a new, extremely efficient and form stable internal structure. The diagonal fingers are split into narrow stripes with additional tapes. The internal camera views make you feel like being in an old huge cathedral: wide open, weightless bows: check it out!
Finally the big size of the RONDO (certified up to 240kg) is still below 7kg!

RONDO Designer’s Note

As we began with the new biplace project, we wanted to do something outstanding, that will set the margin for the next years.
The whole development of the RONDO took as a long time, but we wanted to be as careful as possible. We even already made a certification load test in advance to be able to have pre serial wings been tested out there in the wild.

We integrated the feedback of the pro pilots into another step of evolution. We experienced that we have found a super efficient solution to the “deep spiral” problem, many biplace wings have. The challenge is, offering super high agility and no stable deep spiral (which leads to a fail in certification tests). So the RONDO is offering an extreme good handling, still being easy in the spiral.

We made lots of takeoff test with video analysis to be sure to have best inflating wing in that class. Now the RONDO is not only inflating extremely fast: it is rising up perfectly, and because of the superb performance: lifting you off the ground easily.

Hannes Papesh

Specifications

size		190	210	230
number of cells		58	58	58
projected span	m	11,12	11,66	12,03
projected area	m²	29,97	32,97	35,05
projected aspect ratio		4,13	4,13	4,13
flat span	m	14,18	14,87	15,33
flat area	m²	35,38	38,92	41,37
flat aspect ratio		5,68	5,68	5,68
line length	m	8,45	8,86	9,14
maximum chord	m	3,04	3,19	3,29
minimum chord	m	0,75	0,81	0,81
weight	kg	6.1	6.5	6.9
certified weight range	kg	100-200	110-220	135-240
certification (EN/LTF)		B	B	B
material		Porcher 38, 27
risers		RZ13 (3+1)
riser length	mm	347	347	347
trim travel	mm	80	80	80

RONDO and RONDO C have the same tech data. By the usage of the less weight uncovered lines in the RONDO C (= competition) version, the C version is around 100g lighter.

RONDO rigging version

Based on the feedback of the pro pilots out there we decided to offer 2 version of the RONDO:

RONDO: the normal version with all covered lines.
RONDO C: with uncovered 8001 lines, except the main lines from PPSLS.

Both versions have load and flight tests. The general flying behaviour is very similar. The C version shows slightly better performance and has slightly less weight.

Colors