AngieB Posted May 29, 2017 Report Share Posted May 29, 2017 Hi everyone, we have to navigate through the Harecastle Tunnel in a couple of weeks & still can't work out if we'll get through with our roof boxes in situ! They can't be removed easily as they're pretty heavy. Our air draught is 2032mm with the bikes in one of them, but these could be removed! Help please! We're on our way to a wedding, currently on the Oxford! A. Link to comment Share on other sites More sharing options...
Alan de Enfield Posted May 29, 2017 Report Share Posted May 29, 2017 You have posted your question in an area that cannot be replied to (FAQ) so do not think you are being ignored. Maybe a Mod can move it ? (Done - Dave_P) The water level in the tunnel varies quite considerably - I have gone thru' being able to stand, and I have gone thru where I needed to be on my knees and 'peeping' over the top of the cabin and still hit my head. The only definite way to ensure you will clear the roof is to approach the tunnel very slowly, if you hit the 'height marker chains' then back up and take the roof boxes off - if you clear the chains you are 'good to go'. You may be advised you'll get thru' today, but in a couple of days you may rip-off your boxes. It might be difficult to remove them but it will be better than either smashing them, or, getting stuck, Link to comment Share on other sites More sharing options...
Flyboy Posted May 29, 2017 Report Share Posted May 29, 2017 Give the Red Bull office a call, they should be able to give you the air draft. 03030 404040 during office hours. Link to comment Share on other sites More sharing options...
ditchcrawler Posted May 29, 2017 Report Share Posted May 29, 2017 6 hours ago, Alan de Enfield said: You have posted your question in an area that cannot be replied to (FAQ) so do not think you are being ignored. Maybe a Mod can move it ? The water level in the tunnel varies quite considerably - I have gone thru' being able to stand, and I have gone thru where I needed to be on my knees and 'peeping' over the top of the cabin and still hit my head. The only definite way to ensure you will clear the roof is to approach the tunnel very slowly, if you hit the 'height marker chains' then back up and take the roof boxes off - if you clear the chains you are 'good to go'. You may be advised you'll get thru' today, but in a couple of days you may rip-off your boxes. It might be difficult to remove them but it will be better than either smashing them, or, getting stuck, The chains have now been replaced with a height gauge which I feel is a bit on the cautious side Link to comment Share on other sites More sharing options...
Wanderer Vagabond Posted May 29, 2017 Report Share Posted May 29, 2017 8 hours ago, AngieB said: Hi everyone, we have to navigate through the Harecastle Tunnel in a couple of weeks & still can't work out if we'll get through with our roof boxes in situ! They can't be removed easily as they're pretty heavy. Our air draught is 2032mm with the bikes in one of them, but these could be removed! Help please! We're on our way to a wedding, currently on the Oxford! A. Should be an absolute doddle with your roof boxes on, Bradshaw gives the air draught of 8 feet 10 inches (2691 millmetres) .I've been through a few time with my top boxes on and never gave it a thought Link to comment Share on other sites More sharing options...
Bewildered Posted May 29, 2017 Report Share Posted May 29, 2017 (edited) Went through last year with roof boxes on, had to put the bikes inside the boat though. There are a couple of points where the roof of the tunnel drops down low but these are painted white and stand out well. I would recommend having a decent torch at the stern so that when the roof does dip you can make sure you are in the centre of the tunnel as it did look tight past the roof boxes. it is a bit freaky if you are the last boat going in your direction to enter the tunnel as they close the doors right behind you and your eyes haven't yet adjusted to the darkness. Edited May 29, 2017 by Bewildered Link to comment Share on other sites More sharing options...
Wanderer Vagabond Posted May 29, 2017 Report Share Posted May 29, 2017 20 minutes ago, Bewildered said: Went through last year with roof boxes on, had to put the bikes inside the boat though. There are a couple of points where the roof of the tunnel drops down low but these are painted white and stand out well. I would recommend having a decent torch at the stern so that when the roof does dip you can make sure you are in the centre of the tunnel as it did look tight past the roof boxes. it is a bit freaky if you are the last boat going in your direction to enter the tunnel as they close the doors right behind you and your eyes haven't yet adjusted to the darkness. It's even more freaky when you are the lead boat and they turn the fans on causing the light at the end of the tunnel to go out Link to comment Share on other sites More sharing options...
zenataomm Posted May 29, 2017 Report Share Posted May 29, 2017 It's not just Harecastle you need to plan for. There are a few bridges that due to subsidence can catch you out. Plus there's a road bridge (I can't remember exactly where) after Stone, I think it's at the tail of a lock, I'm sure others will know it. Link to comment Share on other sites More sharing options...
Mal in Somerset Posted May 29, 2017 Report Share Posted May 29, 2017 Came through yesterday. The official safety brief given to you before entering states "Some of the sections may go as low as 1.8m (5'9")..." and " As you enter the tunnel you will be checked with the marking gauge and if you hit the gauge you will be asked to remove the items..." I would say the clearance yesterday was about 2 metres at the lowest point which is just after halfway heading north. Link to comment Share on other sites More sharing options...
billh Posted May 29, 2017 Report Share Posted May 29, 2017 1 hour ago, Wanderer Vagabond said: Bradshaw gives the air draught of 8 feet 10 inches (2691 millmetres) .I've been through a few time with my top boxes on and never gave it a thought Wasn't that in 1904? Subsidence has taken its toll since then! Link to comment Share on other sites More sharing options...
Mal in Somerset Posted May 29, 2017 Report Share Posted May 29, 2017 36 minutes ago, zenataomm said: It's not just Harecastle you need to plan for. There are a few bridges that due to subsidence can catch you out. Plus there's a road bridge (I can't remember exactly where) after Stone, I think it's at the tail of a lock, I'm sure others will know it. I thought that as well but can't remember exactly where it is! We work on the basis of if we can get under the culvert on the Droitwich we can get anywhere! Mind you that has been very close on occasions! Link to comment Share on other sites More sharing options...
jennywren Posted May 29, 2017 Report Share Posted May 29, 2017 (edited) I came through Harecastle last month and managed to smash the back of my boat up. The lowest bit caught me by surprise, had the tiniest wobble and then crash...not helped by the fact my cockpit is in the middle and the back was the highest bit of my boat (not any more...) so I couldn't see what it was doing whilst I could see the cabin sides very close to the arches of the roof (I think I measured the cabin sides at about 5'6?). I didn't have to duck at all though, even though I've quite a high up position in the cockpit-unlike a couple of bridges on the Ashton canal-the middle was fine, it's the low edges and changing roof profile that made it tricky. Certainly had to really concentrate. Personally I'd say if you have doubts take it off even if it's difficult to do so. Better to go through a bit more relaxed knowing you're alright than gripping the steering wheel/tiller in a death grip as you try not to bash your roof boxes up, or actually bashing your roof boxes up. Edited May 29, 2017 by jennywren 1 Link to comment Share on other sites More sharing options...
Cheshire cat Posted May 30, 2017 Report Share Posted May 30, 2017 There is a bridge between Stoke railway station and the top lock that is lower than the tunnel itself in my opinion. It has seen off many a boat chimney. Link to comment Share on other sites More sharing options...
zenataomm Posted May 30, 2017 Report Share Posted May 30, 2017 2 hours ago, Cheshire cat said: There is a bridge between Stoke railway station and the top lock that is lower than the tunnel itself in my opinion. It has seen off many a boat chimney. That's the one I was trying to describe in my post above. It's a brute, I remember having to drop the sheets, stands and box mast to get a semi loaded boat under it. Link to comment Share on other sites More sharing options...
Alan de Enfield Posted May 30, 2017 Report Share Posted May 30, 2017 (edited) I had forgotten the one just as you exit one of the Stoke double locks. That's the one that destroyed our friends cratch. Their boat does sit fairly high in the water and the cratch board is raised about 4" above their roof line - the front got hooked onto the bridge girder and ripped it off completely. Yes - it is lower than the Harecastle, as, after repairs they 'sailed thru' the tunnel without problems. Just a reminder tho' - the water levels do vary on the T&M from one week to the next. Edited May 30, 2017 by Alan de Enfield Link to comment Share on other sites More sharing options...
dor Posted May 30, 2017 Report Share Posted May 30, 2017 In a tunnel, what exactly do they mean by "air draught"? It is one thing giving it for a flat bridge, but in a tunnel with a curved profile, you need to know the width that the air draught figure refers to. Link to comment Share on other sites More sharing options...
Alan de Enfield Posted May 30, 2017 Report Share Posted May 30, 2017 10 minutes ago, dor said: In a tunnel, what exactly do they mean by "air draught"? It is one thing giving it for a flat bridge, but in a tunnel with a curved profile, you need to know the width that the air draught figure refers to. Did you notice that the barrier 'height o-meter' is curved ? Fit under the curve and you will be OK. 21 hours ago, ditchcrawler said: The chains have now been replaced with a height gauge which I feel is a bit on the cautious side Link to comment Share on other sites More sharing options...
alan_fincher Posted May 30, 2017 Report Share Posted May 30, 2017 19 hours ago, Mal in Somerset said: We work on the basis of if we can get under the culvert on the Droitwich we can get anywhere! I certainly wouldn't use that logic if you are considering Froghall tunnel! 1 Link to comment Share on other sites More sharing options...
dor Posted May 30, 2017 Report Share Posted May 30, 2017 (edited) 2 hours ago, Alan de Enfield said: Did you notice that the barrier 'height o-meter' is curved ? Fit under the curve and you will be OK. Yes of course. But that is completely different to the various quotes of 'air draught'. Quote 21 hours ago, Mal in Somerset said: We work on the basis of if we can get under the culvert on the Droitwich we can get anywhere! Quote I certainly wouldn't use that logic if you are considering Froghall tunnel! Again, it is not just the height that is important. If you have a significant tumblehome, getting through Froghall is easier - provided you are a good steerer! Edited May 30, 2017 by dor Link to comment Share on other sites More sharing options...
Mal in Somerset Posted May 30, 2017 Report Share Posted May 30, 2017 2 hours ago, alan_fincher said: I certainly wouldn't use that logic if you are considering Froghall tunnel! Good point we've written Froghall off as a no chance! Link to comment Share on other sites More sharing options...
Rob-M Posted May 30, 2017 Report Share Posted May 30, 2017 3 hours ago, alan_fincher said: I certainly wouldn't use that logic if you are considering Froghall tunnel! I agree, I've taken our boat through Droitwich but the Froghall gauge dragged along the roof by so much I didn't attempt it. Link to comment Share on other sites More sharing options...
ditchcrawler Posted May 30, 2017 Report Share Posted May 30, 2017 5 hours ago, alan_fincher said: I certainly wouldn't use that logic if you are considering Froghall tunnel! Or some of the Middle Level Link to comment Share on other sites More sharing options...
alan_fincher Posted May 31, 2017 Report Share Posted May 31, 2017 13 hours ago, dor said: Again, it is not just the height that is important. If you have a significant tumblehome, getting through Froghall is easier - provided you are a good steerer! Yes, obviously tumblehome affects it, by memory is that you would need to have a cabin shaped throughout with unusually heavily sloping sides and very very narrow roof before Froghall would be easier than the M5 culvert on the Droiitwich. Same boat in all pictures Froghall M5 Culvert (River level "normal" at time of picture) Gosty Hill Link to comment Share on other sites More sharing options...
Cheshire cat Posted May 31, 2017 Report Share Posted May 31, 2017 Froghall is further complicated by the bend that means you have to enter at an angle. I've done it once but won't be doing it again after the boat has been repainted Link to comment Share on other sites More sharing options...
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