Could This Device Have Changed Medieval European History?

RANGED Weapons
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3 Video Views·Jun 22, 2025
Jason investigates a device, the instant Legolas, from Joerg Sprave Slingsht Channel, that could have been attached to a longbow and tests how practical it would be to use from horseback.
It's not often in one's life that an engineering wizard from what used to be the Holy Roman
Empire sends you gifts. What's in these boxes potentially could have changed the outcome of
personal longbows. I sent this over to a chap called Jörg Sprave, who runs the Slingshot
channel on YouTube. Now he specializes in all sorts of elastic powered weapons and he is a
complete genius when it comes to making new forms of, well, weaponry really I suppose is the best
way to look at it. I contacted him and challenged him could he do something that would work with an
English longbow and so this is mine that I sent him. This is not a warbow, this is about a 30 to
35 pound hunting bow. It is still obviously a longbow in form and function but it's not as
powerful as a medieval warbow would be and quite frankly I can't actually draw a medieval warbow
yet. I'm working on it but I challenged him to see whether he could do something miraculous with
this. So that's the that's the longbow and then we'll open the next package which is where the
magic is and Jörg thank you very much if you're watching this. I'm very excited to see what this
actually does and how it functions. What Jörg has done is create a device that could have been made
by medieval people and it attaches to the longbow and it gives the longbow an incredible function.
It actually allows you to loose many many arrows very very quickly. Let me show you it.
I haven't actually seen what survived the transportation from mainland Europe yet.
It's across the sea to get here and this is what Jörg called the instant robin hood.
This device, Sir Robin of Loxley on the side of it in pyrograph writing which is lovely, beautifully
made of very high quality plywood. I don't know whether this is birch plywood but it's very very
smooth and of course they did have plywood in medieval times as we know a lot of viking shields
for example were made not from plywood but they were made into plywood by having small strips of
lindenwood ideally but often ash or whatever wood they had because if you cross the grain of wood
it gives it more dimensional strength. It means it's strong in equal amounts in equal directions
so that's what Jörg has done here. There is literally nothing in this with the exception of
the Merlin's Eye, the laser sight, which couldn't have actually been made by somebody in medieval
times. Yes they wouldn't have had power tools, they wouldn't have had this specific type of plywood
but they could have made it all. This bit is very much not medieval. Jörg has put this on here.
It's a red dot aiming device which should make this more accurate. You wouldn't need it though
for its basic function but that's a lovely little touch, the magic of Merlin applied to a laser.
Let me explain how this actually works. What you do is you attach the bow here
like this and then it creates a magazine for the arrows. This is in effect a magazine
for a longbow. So the longbow itself attaches here and you bind it into place which I'll do
in a moment sort of somewhere in the middle so your longbow is completely natural there's nothing
drilled into it there's nothing like that it literally just goes on there and then the arrows
and this is the really interesting bit the arrows go in this magazine now this magazine
is fairly easy to load and unload these are the arrows or arguably these are bolts that can be
shot from the longbow now these are much shorter than a traditional arrow and let me explain some
of the features of how it differs from an ordinary arrow this is an ordinary longbow arrow
this one is fletched with goose feathers but you'll notice it's fletched with three of them
now three fletchings make it very stable but it also means that because the nock is a vertical
slice in the end of the arrow it means that the arrow has a handedness so the arrow should go on
the bow a particular way around this has the cock feather sticking out at right angles to the nock
and the other two feathers offset somewhat so this has a particular way around depending on which side
of the shaft of the longbow this arrow goes you always want the cock feather to the outside because
if the cock feather was on the inside it would deflect the arrow more than than it does if it's
the other way around now this kind of arrow was very very traditional and this is the sort of
thing that would have been used in the so-called hundred years war that incredible historical
period which actually lasted about 116 years in the middle ages war between the Plantagenet house
and the house of Valois which is the French and the English thrones effectively so this arrow
would be very familiar to people in the medieval period interestingly the arrows or bolts that are
used for Jurg's device are a bit more like those used in crossbows so you could argue this is a
bolt because on a crossbow you don't have the feathers or the veins sticking out in the quite
the same way that you do with a longbow arrow you'll notice this has just got two and that
means they stack in the actual magazine here rather nicely and similarly on crossbows they
they go out sideways so they're just two of them and they're in a horizontal plane so the arrow
can go either way around in this device and this means they'll stack inside this but these are so
short they can't be shot back at you because traditionally archers in medieval warfare
certainly where the longbow was concerned ran out of arrows and then went forward to
get more arrows to replace the ones they'd actually shot but if you can't shoot these
back at the enemy these are useless you can go and pick them up because you've got this device
but the enemy can't unless they have this secret weapon and that's what this could have been this
could have been a secret weapon which could have changed war it wasn't far away a draw for a long
time between the house of valois and the house of plantagenet and at one stage the house of
plantagenet the english side kind of almost won but then suffered a whole series of setbacks
with a different king a whole different structure some bad decisions and some great
generalship from the valois side and from the french what i'm going to do now is assemble the
magic bow and the instant robin hood bear with me this may take some time i've not done it before
so what i'm going to do is tie this on to the end here what i'm doing is a style of
whipping that was medieval but whether it will work or not i don't know
you can see how that's now attached to this t-piece fairly firmly held and in operation
i will be simply holding it like this what i've got to do now is get the string
through this slot pull that through and then i have to actually cock the bow
attach the bow string and then we're ready to shoot this device can hold
six shots at the same time obviously you could make this bigger if you wanted to
but it might become more cumbersome so be an optimum there so let's just
span the bow it's a very light one
right this is starting to look a bit like a crossbow but it's absolutely not a crossbow
because you pull this out you get to this position and then you release and then the
arrow comes out i'm going to load this for the first time and try taking a few shots
my target is only about 10-12 meters away but is man-sized i am not a particularly good archer
i'm certainly not qualified to actually instruct you in any way shape or form about how to use a
bow or anything like that this is all personal experimentation and enjoyment i'm going to load
this now and it's as simple as for me anyway i sort of slot the arrows in and they of course
they stack rather nicely five six that's six arrows in there that just holds them in place
it's got a little bit of tension on it i'm not going to use merlin's eye just yet although i
am tempted i'm just going to actually release this and show you how it works so you don't
actually use this you use your arms as usual you can use whatever number of fingers you want
because there's no the arrows up here that's really awkward but it might work i'm going to
use my three fingers underneath the bow string goes around the tip of the arrow here and slides
in here and there's a double click so i'm led to believe so let's uh let's have a go with the
instant robin hood the sir robin of loxley created by jurgs brava of the slingshot channel
let's actually shoot my first bolt from an english longbow good grief that's very easy
let me try a few more that's it six shots slightly out of control by me there i'm not used to it of
course um but it worked incredibly well and did you notice the speed with which i shot six arrows
at the target the first time i tried it let's reload and have another go well that's not too
bad i've got all of the shots easily within a human torso size target um they've gone well one
of them has gone all the way through the target one's stuck in the vertical post so i've got to
get those out and reload it but that's not bad shooting for a device that i'm completely
unfamiliar with um and that has its own inherent instabilities you know the binding on the longbow
and all these kind of things and of course none of these arrows could be shot back at me unless
they had this secret device so let's take the arrows out reload and have another go and maybe
i'll use merlin's eye this time i've now for fun i've just switched on merlin's eye and if you can
see i now have a medieval longbow with a red dot sight obviously they would not have had laser
technology in the hundred years war they had guns and stuff but lasers were quite a few hundred years
away yet maybe merlin would have come up with something like a laser in the legends i'm
reloaded now i'm going to turn on the magic there he goes now let's see if the red dot makes any
difference to my target shooting and then i've got something to discuss with you
oops it really is incredibly good fun you get through those six shots very quickly i thought
i had an extra one there but i don't uh it's definitely empty now uh i'm not sure my red
dot sight was properly calibrated so merlin i don't think you improved my aim that time
actually merlin i apologize it has improved my shot quite dramatically i have one two three four
five and one went through i managed to shoot within a center five six inch spread around the
shoulder i was aiming here so obviously merlin's eye is slightly off i'd need to adjust it and
it would go where the red dot said but that's interesting so it does actually improve my
grouping if not my targeting because it's not actually properly calibrated so let's reload
and then i want to talk to you about something that's really intrigued me what i really want
to talk to you about is how this might have changed the course of history it's a period
of warfare called 100 years war uh which was actually about 116 years between the house of
valois which was more or less the french king and the house of plantagenet which was more or less
the english king with quite a large amount of what is now france as part of its empire they
fought a war they also used a technique called chevalier i've probably slightly mispronounced
that word but it means raiding effectively a there's a form of riding around on horseback
smashing up your enemy's landscape it's a political terror it sends your ordinary people into hiding
in behind fortresses it's generally a form of psychological warfare on the population
but it needs a very mobile force now the english were famous for their longbows
the question is can you or did you use a longbow from horseback and what are the complications of
using that particular weapon while mounted did they ever do that i think they probably would
have done maybe they chose to get off first and then shoot their longbows then get on their horses
and ride away who knows do you think this might have changed the face of chevalier warfare
because i'll explain to you the difficulties of horse archery separate from foot archery by
getting on this medieval saddle and showing you what i mean i want to talk about medieval mounted
soldiers because we know the hundred years war was famous for very mobile force and the longbowmen
were very likely mounted on horses in fact we know they were because otherwise we wouldn't
be able to get away it was one of the problems that led to agincourt which is a lot of the foot
soldiers weren't mounted and they got encircled by the largely mounted french cavalry i have here
my trusty wooden steed this is just four legs and a reproduction medieval saddle with its high
front and back this is the kind of saddle that mounted archers would have likely encountered
when they were riding to war during the hundred years war so i'm going to get on this and show
you the difficulties of using a longbow from this kind of saddle so here i am on my 15th century
saddle obviously there would normally be a horse's head here but imagine that so i can't go into this
area at all otherwise i hit my horse's head so here's the longbow you can immediately see the
issue with such a long weapon which is obviously i can shoot in that angle i can shoot all the way
around here but getting over the horse's head and shooting this way is going to be really really
difficult but that's the same with quite a lot of mounted archery theoretically you could just turn
the bow sideways and do stuff with it but there isn't a very strong tradition of using longbows
from horseback there might be a reason for that the simple reason might be that the terrain wasn't
suitable it might be that people who could use longbows weren't particularly trained in horseback
riding um could be a whole bunch of different things potentially just tradition but here's one
of the other issues so if you don't have something like this device that makes me an instant success
at mounted archery you've got your arrows here sometimes in mounted archery they actually have
four fletchings but this one is a three fletched uh standard one you have to take the arrow out
of wherever you're storing it you have to put it onto the bow you have to get it the right way
round all the time while you're moving along you have to knock it and you have to draw and loose
all in time with the horse's movement now this arrow has one way round it needs to actually fall
on the string to shoot and you notice that on mounted archery we tend to have the arrow on this
side with warbows we do see arrows used on foot with the arrow shaft on this side of the bow
but typically most people tend to use the arrow on the opposite side um you'll have to ask an
expert why but typically that's what people talk about today having it on this side it's actually
arguably faster on horseback to use the arrow on this side use your other hand
knock while you're riding your horse as well of course don't forget draw and loose that takes a
lot of training to do efficiently and you've got to store the arrows somewhere as well there are
people that can get off multiple shots in a few seconds on horseback and they are highly trained
highly skilled there's some fantastic videos of it particularly in Hungary there's a lot of
mounted archery of great quality in Hungary they shoot about five or six arrows in 20 or 30 seconds
let's see if this instant robin hood can help me match the best trained mounted archers in the
world let me see whether this can convert me into an instant champion mounted archer obviously i'm
not a real horse but i am kind of sitting on a saddle like you would be on a horse i can brace
myself in lots of different ways i don't have those skills yet it's something i want to learn
one day but let's see how i can shoot and let's see what this would enable me to do key thing
about this device is i don't have to worry about knocking the arrow and all that complexity before
i can actually shoot so one two three four five six empty that is very very fast shooting from
somebody who quite frankly doesn't really have mounted archery skills imagine this in the hands
of thousands of skillful mounted archers imagine what this could have done for the Angevin dynasty
and their chevalier raids i think this could have changed history york thank you very much for
creating this i'd encourage my viewers to go and have a look at the slingshot channel
it is full of crazy and eccentric ideas and it's definitely good fun it's not medieval but it
doesn't matter it's all about engineering and having fun with engineering skills so go and have
a look at that and thank you for making me an instant robin hood
