Has anyone got a "Elt-Max 50 motor in their junk box or in an old boat ? I am looking for one for a restoration project.

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Thank you for another good suggestion. Wiring on both my crash tenders is getting old (like me ! !).Will check it out carefully.
Rob

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Hi Doug.
Thanks again for your suggestions.Will replace servo and let you know the outcome.
Rob

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Hi Doug. Thanks for response. Typo ! I obviously meant
2.4ghz.!Rudder servo appears to be ok ? Do you mean it could be its integral control board causing the problem ?
Rob

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I have a real mystery problem ! Occasionally, one of my crash tender models loses control for no apparent reason. It is running on 40mHz Futaba system. This has been used for a number of years without any probs until recently. I have managed to reproduce the problem in the workshop just once. Effect is that using rudder channel, interferes with throttle channel such that when rudder servo operated the throttle goes completely haywire ! At the lake I have checked to make sure that no one else is on same freq. Most people run 2,4mHz anyway.
When simulated in the workshop I have changed receivers transmitters and crystals and still had the problem. The next day
problem had disappeared ! The other kit used in the boat are a Futaba rudder servo and two 30amp Electronise esc's running in parallel. Have checked receiver voltage under load--- no problem with this either.
Has anyone got any ideas ?
Any suggestions would be much appreciated.
Rob

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Hi Canubus
Am running 2 9.6c packs in series.this gives about 18v on load.
Rob

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Hi Canabus
Thanks for your response. Very helpful.
Currently the 820's are running on two 9.6v Nimh
packs in series. Have not clocked amps in running conditions.
I assume that I am not exceeding 20v x 20amps rated
by Graupner spec sheet.
Best regards
Rob

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I am hope to change twin prop drive on an old Aerokits 46" Crash Tender to brushless motors. Current drives are Graupner 820 Race motors with "Propshop" 35mm diam. 3 blade cleaver props.
Would like to retain props as they are efficient but can someone with experience recommend some good inrunner brushless motors
for me.
Thanks in advance

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Hi. I have always used molybnedenum disuphide grease made up to a thin creamy consistency with "3 in 1 oil" or similar. This has worked well on fast electrics, fast scale boats etc.

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I am very impressed with your superb work on this kit.
Some years ago I provided a lot of data on my two boats to Mike together with Original Vosper data. I am pleased that his kits are doing well. [ I have an Aerokits 46" boat and a much newer 46" GRP hulled boat. Both have twin drive trains and mixers. ] I am surprised that you have not fitted false keels and twin props/drive trains to your
boat as the Vosper boats had. ? Apart from good planing performance both of my boats can turn in their own length as the original 93 / 94 boats could do.
I hope your boat looks as good on the water as your pics so far suggest.

HI Colin
Herewith some photos as requested.
Please let me know if you receive ok as
am still using an old steam driven P.C. !
Best regards
Rob

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Reluctantly, I have to say goodbye to two old friends ! For health and other probs. I am no longer able to do much sailing anymore. I was a long time member of Mid-Thames MBC. Have two 46" Crash tenders of different pedigrees for sale.
#1 Original Aerokits 46" boat built by me In 1960's using a "Taycol" motor and heavy NiFe batts. ! Two restorations, In 1980's and 2006. Now has 2 x "Bullet" 24v motors [1980's], auto cooling pump, and monitor pump.[monitors servo driven] Rigged as original "94" Heavy but easily achieves well above scale speed and planes. Won "Best In show" at Burton Fireboat Fun Day In 2009.
#2 SemI scratch built 46" boat from 2007. Built on GRP hull and some pre-cut parts from Mike Mayhew at Waverley Models. Most of woodwork and metal fitts. made by me. GRP hull Is very close to Vosper profiles. Fitted with 2 x w/cooled Graupner 820BB race motors, auto cooling pump etc. Rigged as original "93"
Both boats have 2 x "Electronise" 30A ESC'S and Futaba 40meg radios. Both fitted with Propshop 3 blade racing props.
Both are In running order with cell packs etc. Packs may need replacing as duration now a bit tired. With a bit of a further update, both boats would still compete with the best ! For some pics and further data PM me. I am going to try to bring both boats to the Leicester Fireboat Funday next month If anyone Is Interested In them. Just need a sensible offer ! Good sailing !

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