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ASP/MAGNUM FS400AR Rebuild/Overhaul

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Old 10-20-2012, 08:55 AM
  #1326
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

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ORIGINAL: retransit



Tom, I know you fabricated a collector ring from scratch. Is it possible to outline the steps that you took to build it or is it documented somewhere else?

Bob
Bob, yes I outlined it and posted photos. I believe it is in this thread! I will search through it and try to find the relevant posts.

Okay, found it. Starting at post # 185.

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Old 10-20-2012, 10:12 AM
  #1327
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

OK, thanks Tom.

On the other subject about the price of RIM; I have no doubt as to Mr. Rogeau's costs to produce the piece. Everything we do today is pricey. It's a great mod and seems like something that just fits so well with these engines and answers some of the problems that they have. I, like many others, just can't justify the cost. I'll hope that it gets manufactured at a cheaper price somewhere and Mr. Rogeau is compensated for it, but I have my doubts.

Bob
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Old 10-20-2012, 02:22 PM
  #1328
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

First, my name is not "Dan" - I was not being critical of Mr. Rogeau but I was simply stating a fact that the part is just too expensive for me. I am well aware that producting custom parts in small quantities is quite expensive. I am also aware that the main benefit of the alternate manifold is better lubrication of the crank, rods and pistons. I also have a UMS Evolution 777 radial engine that uses uses a similar intake system to that Mr. Rogeau is providing for the ASP 400. I believe that Mr. Rogeau may have also been involved with the design of that engine's intake sysem and I personally appreciate his efforts. I would love to see the manufacturer incorporate his design on the ASP 400 and compensate him for his efforts.

Roger the radial rabbit.
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Old 10-20-2012, 02:28 PM
  #1329
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Okay Dan.

j/k
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Old 10-21-2012, 01:40 AM
  #1330
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

i am still tempted to mod mine with an impeller in the back to see what happens. I dont think it can run worse as saito do that with theirs. i need to ponder it!
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Old 10-21-2012, 07:24 AM
  #1331
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

We are all waiting on you!
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Old 10-21-2012, 02:22 PM
  #1332
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

i dont think i can be bothered to take it apart though! my glow driver arrives on tuesday so with luck i will be flying again next weekend
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Old 10-21-2012, 03:47 PM
  #1333
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Tease!!
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Old 10-21-2012, 11:34 PM
  #1334
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

ok, make you guys i deal. If someone who had done the intake mod no longer needs their intake manifold perhaps we can come to an arrangement where i can obtain it, modify it and see where we go. that way everyone still has a working engine if it is unsuccessfull!
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Old 10-22-2012, 12:11 AM
  #1335
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul


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ORIGINAL: Carosel43

ok, make you guys i deal. If someone who had done the intake mod no longer needs their intake manifold perhaps we can come to an arrangement where i can obtain it, modify it and see where we go. that way everyone still has a working engine if it is unsuccessfull!
hmmm... who could he be playing at...

Not much happening here, finished repairs on the fw190d9 and will take her flying tomorrow.

I have however ordered some g-sonic props. i want to check the rpm on the 400 with the menz, the apc and the g-sonic.

I will also use the scales to check pull. looking forward to those figures.

Rev
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Old 10-22-2012, 04:09 AM
  #1336
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

gsonic props run about 800rpm faster than other brands but i have found them noisy. also rpm limit on the big blades is very low (6000 ish) im not a fan

for example my laser 300v runs a menz 20x8 at about 7400rpm and the menz 22x8 at about 7300. it pulled brilliantly, but was hopeless over 1/3 power as the noise was horrendous. that said my La7 howls more than the other 300v i have, so i may have another go with the gsonic
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Old 10-22-2012, 06:00 AM
  #1337
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Ok, nilsreinert and i have come to an arrangement regarding this impeller idea. So watch this space
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Old 10-22-2012, 08:59 AM
  #1338
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

If I offer my intake manifold, and you make a successful mod that incorporates an impeller fan, and it does the function of the Rogeau RIM at the same time (open to the innard's) and also increases fuel/air distribution and power, then of course I want it back when it's all done.
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Old 10-22-2012, 09:29 AM
  #1339
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

there would not be an easy way of incorperating both mods. at least not with the way i have in mind anyway. if ti works well i might mod my saito 450 as well, but i have to try some carb tweaks first
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Old 10-22-2012, 10:33 AM
  #1340
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Ok boys and girls, i just took the intake section off of my saito 450 radial to check a few things. one thing i wanted to check was the conrod...i am sorry to report that saito 450 conrods are plain ali with no bushes or bearings of any kind. pretty crappy design if you ask me
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Old 10-22-2012, 03:53 PM
  #1341
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

That concern comes up from time to time. The conrods and crank pins last a long time.
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Old 10-22-2012, 11:26 PM
  #1342
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

I am not worried about the pin, but running no bushes on any of the conrods strikes me as a bit poor
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Old 10-23-2012, 08:16 AM
  #1343
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

No doubt that bronze bushings survive hot, lean runs better. The high silicon content aluminum as used in the con rods makes good bearing material. However, it does seem that a bronze bushing would last longer. This doesn't appear to be the case for the the Saito rods though.

A lot of people prefer to see the bushings like you do.
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Old 10-23-2012, 12:26 PM
  #1344
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

@Carosel

I know Nitro is evil but just for kicks, I gave my 300V a taste of the new 10% Rapicon fuel.

APC 20x10 @ 7700rpm

B***y hell, thats 5.26 bhp!!! @ 26lb Thrust...

w/o Nitro: 7300 rpm...
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Old 10-23-2012, 12:58 PM
  #1345
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul


Quote:
ORIGINAL: Carosel43

I am not worried about the pin, but running no bushes on any of the conrods strikes me as a bit poor

It's common practice on most model engines these days. The specific grade of alloy may be slightly different, which would be indistinguishable to the human eye.

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Old 10-23-2012, 11:43 PM
  #1346
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

This is the first engine i have seen thats totally bushless, and i am well aware of the fact the certain alloys are great for bearings. But you may then compramise something else. Im still a believer in getting the right material for the job, ie something thats good in tension for the rod and something thats good as a bearing for the bearing. But thats just me!

Rev, 20x10 at 7700?!!? thats pretty nuts. And it means it totally murders the saito 450 which has an extra 27cc capacity!! i am very suprised by that figure as i get 7400 on a 20x8 menz with 5% nitro. But, the menz is a slower prop than the apc. I might have to splash out on a few if they go that fast! Also i have heard good things about Skorepa props but we cant get them in europe. Any of you yanks wanna send us a few to play with? :P
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Old 10-24-2012, 08:24 AM
  #1347
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Skorepa? Never heard of it....
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Old 10-24-2012, 08:31 AM
  #1348
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Alright, just looked them up. Props look nice. They also have a nice test stand, reminds me of my 30 year old design.
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Old 10-24-2012, 09:58 AM
  #1349
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

the word on the internet is that they are good, thats all i know!

Also, a large Bucker jungmeister is looking at me. Wingspan of 92''. i dont think the 400 will be man enough, but the saito 450 might. Any ideas?
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Old 10-24-2012, 10:16 AM
  #1350
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Default RE: ASP/MAGNUM FS400AR Rebuild/Overhaul

Carosel, check out Fiala Props. The look very similar. Love them. Have already ordered 20x8 and 20x10 to test

http://www.vrtule-fiala.cz/shop/

Rev
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