La filière la plus couramment envisagée est celle de l'avion à moteur hydrogène. Mais beaucoup de progrès restent à faire (entre autres pour le stockage de l'hydrogène en sécurité) avant qu'une telle propulsion ne soit envisageable pour le transport de passagers à grande échelle.
Premierement, nous n'avons aucune idée de combien de reserve, ils nous restent, toutes les compagnies petrolieres, disent un nombre qui est souvent tronqués pour faire monté les cours, il y'a 30 ans, tout le monde disait qu'en 2000, il n'y aurais rpresque plus de pétrole, bcp de gisements restent encore inconnus.
Pour revenir au sujet, il existe des multitudes d'etudes:Nouveau carburant: Hydrogene est svt cités mais reste assez complexe a manié.Les Scramjet, puise directement leurs ressources dans l'atmosphere, le X43 de la Nasa en etais un, sauf que l'application premiere reste les voyages spatiaux, et le probleme du "decollage" reste toujours un probleme.Il y'avais aussi pendant un mmt des projets avec un reacteur nucléaire, cela a bien sur été abandonné pour des questions d'environnement si accident il y'a.Derniere solution, bcp plus réservé a l'aerospatiale mais etudié dans l'aeronautique: l'antimatiere. Fabriqué dans les Accélerateurs de particule, la production est de l'ordre de 3 nannogrammes. A noté qu'il suffirait de 140Nannogrammes pour propulsé une navette spatiale pour un voyagé sur Mars(Aller seuleument) pour une durée de 30 jrs. Si, cela va aussi vite que les progrets de l'informatique, ce sera l'energie de demain.
De plus, presque tous les 20 ans, la consommation par passager diminue de 25% sur un vol, ce qui absorbera déja l'augmentation constante du trafic aerien durant les 30 prochaines années, c'est a dire une diminution de plus de 50% de la consommation d'ici les 40 prochaines années, et tout cela, si il n'y a pas de révolution majeur.
La guerre salit tous ceux qui la font: au fil des mois et des années, j'ai vu les deux bords verser dans le mal, j'ai vu le mal affronté le mal, et le bien, ce qu'il y'a de bon dans l'humain, devenir la victime des deux.
25% sur 20 ans ça fait une consommation en diminution de 1.11% par an. Sachant que le trafic aérien croit plus vite que la croissance mondiale (qui tourne autour de 4 à 6% par an) il vaut mieux éviter de trop compter sur la réduction de la conso des avions😉...
moi je m'en fous il me suffit de 5 noeuds de vents pour décoller mon kite et après c'est que du bonheur !! 😛
vive les énergies naturelles 😛 à mon avis on devrait penser à modifier les mongolfières pour pouvoir transporter un grand nombre de passagers dans un confort correct
😄 il est où le site de réservation pour AirEskabo 😉
..... les prévisions les plus optimistes nous donnent encore 50 ans de réserve pétroliére nos voitures auront bien évolué et tourneront à l'huile ou à l'eau mais nos avions ?
Ces memes propos étaient tenus dans les années 70/début 80 et on est bientot en 2007 et de reserves il y en a encore .... et même beaucoup si on ne fait pas entrer en ligne le prix ! ce qui va vite manquer c'est du pétrole "bon marché" c'est un peut diférent
Pour en revenir au transport aérien les russes "auraient fait voler" un TU154 avec de l'hydrogène liquide et je crois qu'aux USA un Tristar a été modifié mais a t il volé, , ,
Et si tu regarde bien le A380 ..... Airbus y a aussi pensé visiblement car le seul PB avec l'hydrogène c'est le stockage surtout pour du long courrier.
www.waterstof.info/SavedPages/AirbusCryoPlane.pdf
Bon voyage et surtout voyagez zen!
Michel France (85)
et ben on n auras plus qu a voyage a pied en velos en bus ou faire comme yann arthus bertran qui ne part plus a l autre bout du monde pour de simple raisons ecologiques.Qui serai pret a en faire autant?????Difficile l ecologie quand tout le monde dois faire des efforts
si l effort est trop grand pour la faiblesse humaine
de pardonner les maux qui nous viennent d autrui
epargnes toi au moins les tourments de la haine
et a defaut du pardon , laisse venir l oubli
Pour ce qui est de l'hydrogène, dans l'état actuel des choses, il y a quand même un gros bémol, c'est que les rares techniques de production non-polluantes sont très fortement consommatrices d'énergie : pas très rentable, donc, à part pour des applications spécifiques très peu consommatrices... Donc il n'y a pas que le stockage comme problème, même si celui-ci est important (dangerosité, volume aussi car il en faut bien plus que de kérozène).
Ca peut bien sûr évoluer. Perso, je trouve l'alternative dirigeable intéressante : évidemment, il faudra accepter la lenteur "relative".
Effectivement, le problème avec l'hydrogène est qu'on ne le trouve pas (ou presque) sous forme gazeuse sur terre. Pour en obtenir, il faut soit l'extraire d'hydrocarbures (par exemple: pétrole...), soit de l'eau (mais dans ce cas, il faut fournir sous forme d'électricité, aujourd'hui encore produite en part importante à partir de pétrole, une énergie plus grande que celle qui pourra être récupérée).
Une solution pour remplacer le pétrole lorsque ses réserves auront été épuisées consiste à convertir du charbon en carburant liquide. C'est grâce à ce procédé que les Allemands, dépourvus de ressources pétrolières, ont pu fournir leur véhicules militaires (gros consommateurs) en carburant pendant la Deuxième Guerre mondiale.
Mais la conversion du charbon en carburant liquide reste coûteuse et produit plus de CO2 que le raffinage de pétrole. Il s'agit donc pour l'heure d'une technique moyennement intéressante. Toutefois, vu que l'on estime que les réserves mondiales de charbon ne s'épuiseront pas avant 200 ou 300 ans, je ne me fais ainsi pas trop de soucis quant à l'alimentation en énergie de nos avions.
A noter encore que la transformation de gaz naturel en carburant liquide fait aujourd'hui l'objet d'importants développements et que les biocarburants (produits à base de plantes) semblent aussi avoir un avenir très prometteur. Mais les sources de gaz naturel tariront aussi dans quelques décennies et la production de biocarburants ne pourra jamais atteindre celle du pétrole aujourd'hui, car pour cela il faudrait cultiver une surface plus grande que celle de notre planète !
Ma copine a réserver à son nom et avec sa CB un sejour lastminute en circuit organisé pour la Thailande, me concernant je n'ai pas fais mon visa a temps (je…
Pourriez vous me dire si bourses des vols est uniquement réserve au français? Car je suis belge. J ai recu mon billet + confirmation etc. Mais aujourd'hui en…
Je voudrais reserver sur ebooking, et je voulais savoir lorsqu il y a des ventes flash par exemple la chambre est a 35 euros, il la mette a 12 euros, est ce qu…
Je ne suis jamais passée par une centrale internet du genre opodo, venere ou booking.com Pour ma prochaine destination (la Toscane et Florence) les prix y…
Ja vais en République Dominicaine en ayant réservé via Thomas Cook. Thomas Cook s'est 'approvisionné' auprès d'un autre organisateur 'Marsans' pour ce voyage…
Many of us have noticed that bugs have been making it difficult to navigate the forum lately.
I’ll let Kate and Ticapi explain the issue:
I went to your profile to check out the Thailand travel journal, and when I clicked on it, it brought me back here again. All week, I’ve been dealing with bugs like this—it’s really discouraging from continuing on VF.🙁
I had the same thing happen, and multiple times. For me, it was Montagnard’s latest journal that kept coming up no matter which discussion I clicked on.
BOLIVIA: THE COUNTRY ON THE BRINK (What's Really Happening)
A dramatic saga is unfolding before our eyes in the Andes. Between suffocating blockades, clashes, an international airlift, and historic political decisions, Bolivia has just experienced 48 hours of rare intensity.
Here’s the full breakdown (economic, social, and political) of the last 48 hours:
For travelers and tourists: the article also includes an important note about the upcoming publication (starting tomorrow) of the precise status of roadblocks, route by route.
I’ll post the full update here on Voyage Forum!
Don’t miss this in-depth analysis. History is being written before our eyes! https://www.petitherge.com/bolivie-paralysie-et-ultimatum
I just discovered a great show on Arte.
It's called "7 en route": seven young European journalists travel around Europe in a fully converted bus, making reports on every city they visit. It's amazing! 🙂
Yesterday, for example, they were in Rome, Italy, and the reports included things like the world's smallest restaurant—a super romantic spot for two. There was also a report on the king of paparazzi in Italy.
They have to pick topics that let us discover the little quirks of each country. And at the end of each episode, we get to see the finished report.
It's such a great show, mixing journalism, travel, and discovery—basically, a must-watch!
It airs in the evening starting at 6:50 PM (I think), and it started this past Monday, July 14th.
If you watch it, let me know—we can chat about it!
I left my heart’s country eight days ago and returned to my adopted one—or was it the other way around? Scotland-Morvan, Morvan-Scotland, I’m not quite sure anymore.
After a quarter without dragging my slippers around here, even though I’d loudly declared I had no interest left in this site, here I am again!
My imagination never stays fallow for long. Just enough time for my inner land to rest. It gets overgrown with fresh nettles, the kind you can pick without getting stung. Then, it’s time to till the fragrant earth and let the story grow.
I hesitated over where to set this story.
Maybe the Highlands, maybe the Hebrides, maybe the Orkney Islands, maybe the Shetland Islands. All of Scotland is myth—easy to embroider.
But in the end, no. I’d almost be too afraid to bare my soul.
The story will take place at home. Simple, practical.
1)
This morning, I was up well before dawn, feeling a bit grumpy, but nothing a bowl of coffee won’t fix. I love my bowl, and no one dares take it. It’s porcelain, edged with intertwined blue flowers. On the bottom, it says "Revol." The factory has existed long before the Revolution. It was my great-grandmother’s bowl. She drank roasted barley from it during the war, then her Leroux chicory.
Last year, a little guy dropped it. My bowl broke into three pieces. A black anger vibrated deep inside me. The little boy was so upset, on the verge of tears. How could I scold him!
I picked up the three pieces and took Little Boy in my arms. His hair smelled of the light, sweet sweat of toddlers. A gentle hug that healed—his budding sorrow and my anger—everything vanished, and time carried on.
Today, my bowl is even prettier. Man fixed it using the traditional kintsugi technique, except he didn’t use gold powder or lacquer but superglue, and he delicately painted the cracks with woad blue. And my bowl is even more beautiful now.
I’m lingering, I can tell—it’s just that a story wraps itself in life, and life can’t be told in the snap of a finger. Life is long. Like in architecture, you start with a rough sketch, called a "sous-cul" (the initial pencil drawing), then you make a tracing, which is the work itself, the one you later carefully roll up in a wooden tube.
Life is like that: you erase, you start over, you use the nub of the pencil until it’s tiny, but you keep going—dreaming, loving.
"Living is a full-time occupation, a unique adventure. Always a surprise and a wonder, which sometimes turns into astonishment. And, from time to time, happiness."*
Alright, enough digressing—this introduction is definitely too long.
Tomorrow, I’ll get to the heart of the matter.
(I hate that expression; it feels like I’m cutting into someone’s skin.)
I’m Yann, a 28-year-old TikToker who loves traveling!
Since I’ve been to several destinations, I’d love to get a flag from each one as a sort of trophy. But from what I’ve seen online, a lot of sites sell them with what looks like really poor quality...
So I’m reaching out to you all to share a site you usually use—help me start my collection! :)
hi there
I’d love to get some opinions—I’ve never used Airbnb before.
They’re offering a key handover via lockbox.
Any tips or advice?
Is it reliable?
Best,
Hi there, I’m Laura, and I’m looking for a few people to answer some questions so I can understand your travel wishes and challenges. It won’t take long—I can chat here, by email, or by phone. Don’t worry, I’m not selling anything! 😊
On this forum, we talk a lot about trekking in the Himalayas, but I’d love to share another side of Nepal: its spiritual, cultural, and religious atmosphere, especially in Kathmandu.
Nepal, much like Tibet and Bhutan, is deeply connected to the Himalayas—the ultimate sacred mountain range. This small country exudes a calming vibe, shaped by a strong spiritual dimension. What I loved most was the unique sensory experience you get there. Walking around temples and tantric monasteries, a distinct scent fills the air—aromatic plants used for ritual fumigation. Locals mainly burn Himalayan juniper, cedar, sandalwood, and other local essences. This fragrant smoke is a way to purify the space and reach the deities, and you’re constantly enveloped in these aromas.
Another striking aspect is the sound. As soon as you step outside, you hear bells ringing in front of temples. People ring them three times before praying to announce their presence to the deities. Nepal is also the birthplace of singing bowls and sound meditation practices. In Kathmandu, you can easily find meditation sessions or "sound baths."
The spiritual dimension is everywhere: a Hindu sadhu practicing asceticism, a lama in deep red robes with his mala, turning a prayer wheel while murmuring "Om mani padme hum." Newar Buddhism, Tantrism, and Hinduism coexist harmoniously in daily life.
For those who love exploring a destination through its culture and spirituality, Nepal is an unforgettable place. What was your spiritual experience in Nepal like?
Hi,
I’m landing in Quebec and then heading to New Brunswick and Nova Scotia. I’d like to rent a pick-up. My question is: does this vehicle come with a cover and is it secure enough to store luggage in? I’ve heard two conflicting opinions. Thanks
I just installed the Maps.Me app on my phone. I only recently found out about this app. I’m traveling in 2 weeks and a few days, and I’m a bit stuck on how to use it.
I’m from the Montreal (Quebec) area, and I’d love to know if there’s a kind soul out there who could help me get started and use the app at least minimally.
If there are private lessons available, I’d be interested in those too.
Like many others, I’m overjoyed to hear that VoyageForum is reopening! I’ve been waiting hopefully for this, and it’s wonderful that it’s finally happening!
I just couldn’t bring myself to actively participate in other French-language travel forums—their format and way of doing things never appealed to me as much. I really hope that VF’s structure, categories, and interface won’t change too much despite the handover, because I’m very attached to them. Through thick and thin, the site has held strong—it’s amazing!
In a previous message, François mentioned that there were positions to fill ahead of the reopening, including moderators...
I’ve been eagerly waiting for this and hoping to send in my CV.
Now, after reading the latest message, it seems like the team is already fully formed. But are there still a few spots left to fill?
I’ve been a VF member for 20 years (since 2004). I’d love to contribute to this wonderful adventure as a moderator if VF would trust me with the role. If the team is open to reviewing it, I’m ready to send my CV. Could you let me know the next steps?
I’m planning a 3-week trip to Japan in May with Voyage Privé. The package includes a 5 GB eSIM, but my phone isn’t new enough to support it. VP told me I could buy a SIM card when I arrive at the airport.
Sure enough, I’ve seen online that this is possible with different providers.
I only need it for checking routes, looking up addresses, train schedules, etc.—basically using Google Maps, TripAdvisor, and similar apps. No heavy downloads or major internet use. All hotels should provide free Wi-Fi for that, right?
Has anyone got any tips for me on this? What have you tried, and how much did it cost?
Thanks for your help!
I’d like to know if you can buy reef-safe sunscreen sprays at 7-Eleven. If so, how much do they cost? We’re traveling with backpacks, so we’ll either buy 100ml here or in Thailand.
I wanted to share a really unpleasant experience from our last trip booked with Promoséjours and organized by FTI.
We booked an 8-day/7-night stay in Egypt, from June 8 to 15.
The flight initially scheduled was changed a week before departure to take off at 10 PM from Paris CDG.
In the end, it took off with a 1-hour delay and included an unmentioned stopover in Marsa Alam.
We landed in Hurghada at 4 AM and arrived at the hotel at 6 AM.
So, we spent our first night on the plane.
For the return trip, surprise—the flight was moved up. We left the hotel at 10:30 PM on Friday the 14th to take off at 2 AM and land at 7 AM at Paris CDG.
So, we spent our last night on the plane too.
After sending a complaint letter to Promoséjours / FTI, they replied that the first and last days can be dedicated to transport (which I already knew) and that no matter how many nights you book, you’re not guaranteed to spend them in the hotel—it could just as well be on the plane.
I’m really questioning this.
Isn’t there a law that protects customers in cases like this?
Because when I do the math, the first and part of the second day were spent on transport, same for the second-to-last and last day. And I paid for 7 nights for a stay that only lasted 5.
Anyway, I just want to say thanks to them—thanks to their two sleepless nights in transit, I’m coming back even more exhausted from a trip that was supposed to be restful!
I also want to warn anyone booking through this agency about visas for Egypt.
At booking, they told me the visa was included in the price, then they sent me an email saying I’d have to pay for it on-site at 25 €.
Once there, we were directed to a special line for FTI customers, and guess what? They charged us 30 €!
Basically, they’re great at making sure you *enjoy* your vacation—mostly by enjoying your wallet!
If anyone has dealt with this kind of situation and won their case, I’m all ears.
Hi there!
I’m heading to Thailand for two months.
So I thought I’d get a Thai SIM card to use Google Maps for getting around cities, mostly.
Here’s my question: will this SIM affect my apps? Or will they work the same as with my Orange SIM?
Is there any setup I need to do, or can I just pop in the Thai SIM?
I’d also like to switch back to my Orange SIM now and then while I’m in Thailand—on the same phone. Will I need to reset the phone, or will it reconnect without any issues?
Thanks in advance for your tips!
Best,
Huiclos
Hi, I’d like to know where we can buy beer or wine in Chefchaouen and around Merzouga. We’ll be doing a circuit and staying at the Parador Hotel in Chefchaouen and in a bivouac in Merzouga.
Thanks for any info you can share!
Hello everyone,
I’m reaching out to all travelers and globe-trotters on this forum. I’m a teacher in Creuse working in a ULIS program (which welcomes children aged 6 to 12 with disabilities into a mainstream school). This year, I’m launching a school journal project that will involve the kids in many different topics. A big part of this journal will focus on opening up to the world, embracing differences, travel, global cultures, and more.
I’m putting out a call to invite as many of you as possible to send us a postcard (from France or anywhere in the world)! The goal is to help us "travel" and discover new places, countries, and horizons in a way that’s much more fun and exciting than a geography textbook. One section of our journal could be called "We received a letter from ," where we’d research the location and share what we learn with our readers—a really enriching activity for the classroom.
The project starts in September 2025 but doesn’t have a strict end date, since this journal and world-discovery initiative will span several school years (the kids stay in the ULIS program for multiple years). Postcards can be sent anytime—throughout the year, across seasons, even during holidays! The kids will find them when they return.
I hope this idea appeals to as many of you as possible, and that you’ll spread the word to your fellow travelers. Help us dream and explore!
For those who’d like to write to us in a language other than French, no problem—quite the opposite!
Thank you in advance for your participation! Below is our address. If you’d like us to write back, feel free to leave your address on a corner of the postcard! 😊
ULIS program students
Bonnat Elementary School
12 rue Georges Sand
23220 BONNAT
Thank you, and I hope to hear from you soon! 😊
Julien
🙂
Hi there! I have to leave Ivato/Antananarivo on December 16th. I have a lot of ariary that I’d like to exchange for euros since I might not be coming back to Madagascar (after this 21st trip). I think the exchange office at Ivato also buys ariary back. If any of you have seen the rate for this buyback in advance, thanks a million!
Hi everyone,
I’m looking for a website that would let me plot my travel route in advance so I can print it out. The idea is to create a map with a little “me” on a bike that my parents can move along as I progress, since I’m planning to cycle all the way to Nepal.
If any of you have done something similar or know of a good tool, I’d love to hear your tips!
Thanks in advance! 😊
I'm looking to buy an ultra-lightweight 50/55L travel backpack with a suitcase or front opening.
Does anyone have any brand and/or model recommendations?
Thanks,
Emma
Hello. We’re a retired couple heading to Sri Lanka from January to March. After the November floods, I’d like to know if we can offer hands-on help to the locals, maybe pack some clothes or other items people might need in our luggage, and who we could give them to. Thanks for any info from those on the ground.
Be careful when sailing between Somalia and northern Madagascar.
It appears to be Somali pirates who have widened their search in the Mozambique Channel, far from their usual attack zone, since, to my knowledge, there are no Malagasy pirates.
Not sure if this is the right section, but just wanted to warn future travelers...
Where’s Cape Vidal?
It’s in iSimangaliso, an independent park in KZN Wildlife, stunning and just a stone’s throw from St Lucia (KwaZulu-Natal, Maputaland).
It’s the beach spot at the end of the Eastern Shores road. You can swim, fish... but watch out for waves, currents, and sharks...
There’s a really nice game drive where you can get out of your car at certain points, especially at Cape Vidal.
That’s where the camp with bungalows and campsites is.
The vervets and samango monkeys (endemic to the area, and the males are pretty big) can be a bit of a nuisance if you’re trying to braai...
They’re super persistent and not shy at all—don’t let them intimidate you, and stay alert because their speed at snatching food is impressive.
Anyway...
I’m reporting two recent attacks by these hyenas... who were *not* in a playful mood...
The first one happened at night—a hyena tried to bite a camper’s nose off in their tent... and succeeded.
The other night, a camper returning to their tent in the early hours was violently attacked by two hyenas... and they had a close call!
So, if you’re camping there, be careful...
Measures are being taken, but for now, it’s a bit risky.
A white rental Toyota Land Cruiser 4x4 carrying foreign tourists was attacked at the entrance of Tsingy de Bemaraha National Park in the village of Bekopaka, western Madagascar, yesterday. So far, there’s been no response from the central government to curb these repeated armed attacks—usually between Malagasy people, but this time targeting foreign tourists.
After an engine failure in mid-2016 on a long-haul flight from BRISBANE to LYON, I developed a persistent aviophobia that I’m struggling to shake off. It’s becoming more and more of a hindrance.
Up until now, I’ve been using an avoidance strategy (for example, avoiding destinations that would require any other mode of transport than a car or train), but lately, it’s become really limiting.
I’m looking for a therapist—either in-person or via video call—who could help me get past this hurdle.