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Traderman - whilst I am not an expert ( I am currently trying to decide what brushless combo to fit to a 34" RAF Crash tender) - clearly your motor is turing your prop shaft way to fast. With your motor spec of 3180 kV and a 14.7 V Lipo - your motor will be trying to turn your shaft at a speed of somewhere in the order of 45,000 RPM !! Firstly your prop shaft may not be rated for anything like this speed and secondly any slight mis alignment will likely be generating significant vibration - enough to cause your problem- have you noticed any? As to motor power - the motor may not be too powerful - but certainly dropping to a lower kV motor say 1100 and reducing the Lipo voltage to a 11 or even 7 volt system might be the right answer......but as I am finding its all a bit suck it and see... Peter
This looks rather like a model of a "She 34" or similar designed by Sparksman & Stephens circa 1970 - classic IOR "bustle" that featured extensively in Admirals Cup team boats raced at that time - just my observations - very likely wrong.... Peter
Mark - many thanks for that lead - just spoken to them - v. useful as they do supply the set of windows although they are not on their online shop. Hopefully they will save some "fiddly" work. Cheers - Peter
Paul, thanks for the reply - I was hoping to avoid the "fiddly" but guess I am going to have to give it a go. Thanks for clarity on No. 93 only having eyebrows over cabin windows - so many pics "models" on the website seem to show frames on all windows ! Now to the nitty gritty - I don't have milling capability so do you think I can get a reasonable result with fret saw/file and plasticard? What thickness should I use? Thanks - Peter
Does anybody know of where (or anyone) I can source the window frames suitable for 34" Crash Tender I am restoring as it appears the original kit boat I have acquired did not have any. Many thanks - Peter
Mark as you see for my 34" Crash Tender I reckon the 3542/1000 kv motor will be OK hence the 35mm dia prop proposal. Just a thought on trimming the rudder assembly to fit under the deck - is this not going to mess up the top stuffing box/bearing on the rudder shaft/post assembly? Cheers - Peter
Mark, thanks for the tip on being able to cut the post and tube on the medium rudder to fit under the deck...... I am planning to use a D 3542/1000 kv motor with max power of around 600W......not wanting to go for water cooled - I was trying to keep the heat down.......this was my reasoning for the 35 mm prop dia - 3 bladed brass for a higher efficiency. Did you have any idead what type ( A,C or D) of 3 bladed prop I should go for? Cheers - Peter
Any advice appreciated - I am restoring a 34.5" Crash Tender model and re-engining to Brushless - am planning on a 3 bladed brass prop - 35 mm dia. But what type should this be i.e. A,C,D etc ? Have been unable to get a clear idea of the different types capability and what is suited to the Crash Tender model. I also have to replace the original rudder (missing!) and was wondering if the "small" size rudder is OK ( 31mm wide x 45mm long) - I am restricted by clearance under the rear deck for the rudder post/tiller arm so a 50 mm height post seems about the limit - any thoughts appreciated - Peter
Neil - I am alos restoring on old 34" Crash Tender and am at point of re-engining -could you detail which motor you have gone with and what kind of performance you get from it? Ideally I wouold appreciate your set up details re motor/battery/esc and prop dia and no. blades. Also clearance of prop to rudder balde and prop tip to hull..... Appreciating any advice for improving over what you have done... Peter Dent
HI Jarvo, tagging along on this post to get some clarification on which RC system to buy. I have a 2 channel R36 sailing model that I need to upgrade to digital and am also rebuilding a 34" Crash Tender that I plan to have 2 channel radio also - I am presuming I can run both boats off one transmitter and have two receivers one for each boat....... I am looking to keep costs low !! Would the RadioLink 2 channel do the job - what benefits going to 4 channel ?? regards - Peter
Canabus - appreciate the offer of boat Plan swap - but I do not have any for the Aerokits Crash Tender - it is a rebuild from an original kit build around the 1950's by a distant relative. I am taking off "lines" by measuring model as I dismantle - effectively replacing complete cabin assembly and bulkheads, transom etc. which have been hit hard by woodworm. The model has been in freezer for 3 months to hopefully get rid of the blighters !!!
Mark and Canabus - many thanks for your responses - both confirmed my suspicions as I am converting to brushless motor - so will reduce prop angle down to about 10 deg with suitable clearance for propeller. Also appreciate the motor setup detail suggestions as I am new to this are of modelling - have done RC sailing before. One more query for now - can I get away without any watercooled motor or ESC on these type of setups for this si=ze model ? I am not interested in speed - just scale performance. Regards - Peter
I am restoring an original built 34" Crash Tender and worried that the propshaft angle is too steep. Has anyone flattened the angle from plans with success or what should the angle be ( I have read a general guide that 10deg is reasonabale to ensure planning.