Search found 25 matches
- 12 Jun 2022, 18:54
- Forum: General IOM
- Topic: How active are people here these days?
- Replies: 3
- Views: 4593
How active are people here these days?
I registered here some years ago re. getting a lowly project back on the water, but 'life' distracted me for some time, until this year. My local club are a fantastic bunch of ladies and gents, full of advice and welcoming-ness. But always good to be able to pick people's brains any time of the week...
- 26 Oct 2017, 19:25
- Forum: General IOM
- Topic: Battery musings
- Replies: 2
- Views: 8806
Battery musings
A few questions on battery power for receiver+servo/winch - inputs would be received with interest: What battery capacity (and voltage) do people use? NiMH, or LiPo? What peak current is needed? LiPo has a better energy density than NiMH - are there 'power packs' available which will fit in a typica...
- 24 Mar 2015, 19:18
- Forum: General IOM
- Topic: Spar form/size
- Replies: 2
- Views: 7856
Re: Spar form/size
Thanks Dave. I've done some more trawling around, and am reading about 'jacklines'/'luff-lines' on round/sleeved masts. For others looking into the topic like me: http://www.onemetre.net/Build/Jackline/Jackline.htm http://modelyacht.blogspot.co.uk/2014/01/iom-new-rig.html [I think this guy refers to...
- 23 Mar 2015, 16:37
- Forum: General IOM
- Topic: Spar form/size
- Replies: 2
- Views: 7856
Spar form/size
I'm wondering about the choices on spar sections (round/groovy) and diameters. Can anyone give me pros and cons of the various options? Thanks. Edit: I do realise that a larger diameter is likely to be (subject to wall thickness) stiffer than smaller and that, in any case, the sail cut should be app...
- 27 Oct 2014, 17:46
- Forum: General IOM
- Topic: MX 14 Fin
- Replies: 3
- Views: 9287
Re: MX 14 Fin
I need some help please. Yes A 6mm rake, and after some filing, surely can't be right - that is a lot . Have you checked with them though? It'd surely be weird if this was their normal quality level, so maybe it was just a duff batch? [a Friday afternoon run...?]. It's all small businesses in this ...
- 10 Oct 2014, 16:52
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
Thanks David. That was the type of reply I was wanting/expecting!David L Alston wrote:Fellas /
....
(Annoying that some of it should be down to over-loading FETs - jeez there's so many to choose from, can it be that difficult to pick one up to the job?!)
- 07 Oct 2014, 09:30
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
What response did you want or expect ? … Wow you have got a bargain there my old china plate. We are all going to rush out and fit one of those for sure. Why did we not think it before !! Well, something a bit more technical, I guess - something about its spec which identifies a reason for possible...
- 05 Oct 2014, 12:12
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
Oh... what makes you say that?David L Alston wrote:The only drawback being, apart from the postage cost.. is that it will last about 5 minutes in an IOM at the top of A rig conditions.
- 03 Oct 2014, 17:43
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
I've haven't had the time on this project lately, so I can't give 'real' info, but I've purchased a http://www.mxcomponents.com/en/winches-drums/12-servo-winch-11-ay.html . (Annoyingly the postage was nearly as much as the servo itself, but hey-ho!). Fits into the existing tray (in fact, is a bit un...
- 03 Oct 2014, 17:32
- Forum: General IOM
- Topic: Rudder servo strength
- Replies: 12
- Views: 20296
Re: Rudder servo strength
Just an update I have purchased a Hitec HS-5495BH and tried it in my elderly TS2. Whilst it appeared to work fine, there was a small amount of interference with the RMG winch as a result of which I have gone back to my trusty HB325 for the time being. RMG recommend only a standard non digital servo...
- 28 Aug 2014, 18:18
- Forum: General IOM
- Topic: Rudder servo strength
- Replies: 12
- Views: 20296
Re: Rudder servo strength
Have come over all impulsive and ordered a Hitec HS5495BH - digital, 7.5kg-cm@7.4V, 0.15sec, standard size. Seems a reasonable spec, and as David rightly points out, it's the Herbert on the tiller that will be a key factor.
- 28 Aug 2014, 16:56
- Forum: General IOM
- Topic: Rudder servo strength
- Replies: 12
- Views: 20296
Re: Rudder servo strength
Yep, I'd been looking at the digital for the position repeatability. And I've got a winch and Rx that will run at 7.2v so it would make sense for the rudder servo to also, otherwise it means dropping to NiMH's or using a regulator - weight & space either way. Came across a low-cost Hitec digital - H...
- 22 Aug 2014, 20:53
- Forum: General IOM
- Topic: Sheeting angle
- Replies: 1
- Views: 7625
Sheeting angle
The plans for my [ageing] Nimbus show the sheeting coming through at deck-level and through a fairlead to the boom. Other pics I've seen of (probably more recent) IOM designs often feature a ~2cm pillar fairlead through which the sheet exits. I was drawn to that at first - it keeps the pull purely i...
- 22 Aug 2014, 20:18
- Forum: General IOM
- Topic: Rudder servo strength
- Replies: 12
- Views: 20296
Re: Rudder servo strength
Colin in the Shiraz I have ordered they fit an HB325 which has 3kg.cm of torque - I can only assume the builders have experience to suggest that this servo is sufficient: http://www.servoshop.co.uk/index.php?pid=HITHS325HB&area=Servo .... There are a lot of experienced IOM sailors on here, guys wha...
- 22 Aug 2014, 20:06
- Forum: General IOM
- Topic: Rudder servo strength
- Replies: 12
- Views: 20296
Re: Rudder servo strength
What I've got in there at the moment (i.e. it came with the boat) is a Futaba S148 - specs I've found online say this is 3kg-cm @6V).
[That reminds me - if it's a 6V max then I maybe need to consider voltage as well as torque, if I stick a7.4V LiPo in there!]
[That reminds me - if it's a 6V max then I maybe need to consider voltage as well as torque, if I stick a7.4V LiPo in there!]
- 22 Aug 2014, 19:00
- Forum: General IOM
- Topic: New Nylet Spirit is here! Progress at last!
- Replies: 76
- Views: 102630
Re: New Nylet Spirit is here! Progress at last!
and let's look at the ever helpful Mr Alston's last post: We are all painfully aware of who built the boat, how you acquired it on E-bay. We have all endured the painful commentary and slow progress together with the saga of weight , servo mounting and all battery purchase. For the life of me I can...
- 22 Aug 2014, 18:47
- Forum: General IOM
- Topic: Rudder servo strength
- Replies: 12
- Views: 20296
Rudder servo strength
Is there any perceived/generally-accepted wisdom on the amount of torque an IOM's rudder servo should be able to impart?
(In case it's relevant: CSA of my present rudder is ~130cm2; 7cm leading-to-trailing edge ['chord length'?], with shaft @1.5cm from leading edge).
Ta.
(In case it's relevant: CSA of my present rudder is ~130cm2; 7cm leading-to-trailing edge ['chord length'?], with shaft @1.5cm from leading edge).
Ta.
- 26 Jul 2014, 16:14
- Forum: General IOM
- Topic: Radio pot, antenna routing
- Replies: 7
- Views: 13786
- 25 Jul 2014, 18:03
- Forum: General IOM
- Topic: Radio pot, antenna routing
- Replies: 7
- Views: 13786
Re: Radio pot, antenna routing
Thanks. I'm a digital/software engineer, but working in the field of RF products - it is indeed a black art! Yep, 2.4gig is readily absorbed by water - that's why we use it to cook with ;) The questions re. antenna placement was for the polarisation: 90 degree antennae both lying flat would be ok-is...
- 21 Jul 2014, 17:28
- Forum: General IOM
- Topic: Radio pot, antenna routing
- Replies: 7
- Views: 13786
Radio pot, antenna routing
Just wondering what's the accepted practice for putting holes in a plastic radio pot for the servo wires (best to bring them through high in the pot, or towards the base?), and for sealing the apertures after? Also, for a 2.4GHz radio, is it the norm to route the antenna up through the deck to get g...
- 09 Jul 2014, 21:36
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
Thanks for the info Levend. The plastic (?) gears seem a bit of a concern, but as you say - it is at a much lower price than RMG. I think my next step is to decide whether I dare slice out a big section of aft deck to give me access for this style of winch - currently, I only have space for a Hitec-...
- 22 Jun 2014, 15:02
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
Thanks David. Yes, I'll be racing. I never enjoy pottering/day-sailing in a dinghy and don't expect model yachting to be different - racing is what gives the enjoyment and challenge, for me. I am cautious about the time I'll be able to find however, hence the wish to be conservative with the initial...
- 19 Jun 2014, 19:32
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
Lol thanks. Space for an arm is a problem though - it's a Nimbus with very limited servo room: less than 4"x3"
- 19 Jun 2014, 18:59
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Re: Drum winch at lowish price
Thanks John, I'll have a look for the modifying route (or if you can point me to a link or search term...?) - re-engineering summat isn't a problem, so that could certainly be a way forward. I'd imagine smooth mark rounding is wise anyway, rather than slamming the helm down and sheeting in like a ma...
- 19 Jun 2014, 14:19
- Forum: General IOM
- Topic: Drum winch at lowish price
- Replies: 22
- Views: 33116
Drum winch at lowish price
I'm trying to choose a drum winch servo for a hull I'm refitting. It's an old boat and design, and my first, so at this stage I don't want to go to the expense of an RMG. The Hitec HS-785HB is obviously very low cost, but how much of a problem is the slow speed - for a beginner, club sailor (albeit ...