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Asp 21m & Asp 46m

Old 09-15-2011, 12:03 PM
  #1  
carlosam
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Default Asp 21m & Asp 46m

It seems to me that the propellers would be given to break of the engine.

Anyone know the dimensions of propellers for these engines?

I could not find the percentage of nitro to be used in these engines ?

Asp 21M
Specifications:
Displacement: 3.34
Bore: 16.30mm
Stroke: 16mm
Suggested prop: 8*6
RPM: 2,500 ~ 19,000
Weight: 280g


Asp 46M
Specifications:
Displacement: 7.45
Bore: 22mm
Stroke: 19.6mm
Suggested prop: 10*6
RPM: 2,000 ~ 18,000
Weight: 520g


Old 09-15-2011, 01:29 PM
  #2  
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Default RE: Asp 21m & Asp 46m

For those engines, an aircraft prop of the sizees listed sound about right since I have an OS Max 25FP that says 8X6, 9X5 and 9X6 in the instructions as well. With the RPM ranges listed, I hope you're not planning on putting them into high performance boats as they're both an aircraft engine with a cooling jacket. As far as boat props, I'd start out, depending on the hull, with something around 37mm in diameter for the 21 and a 42mm on the big one
Old 09-16-2011, 01:51 AM
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carlosam
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Default RE: Asp 21m & Asp 46m


ORIGINAL: Hydro Junkie

For those engines, an aircraft prop of the sizees listed sound about right since I have an OS Max 25FP that says 8X6, 9X5 and 9X6 in the instructions as well. With the RPM ranges listed, I hope you're not planning on putting them into high performance boats as they're both an aircraft engine with a cooling jacket. As far as boat props, I'd start out, depending on the hull, with something around 37mm in diameter for the 21 and a 42mm on the big one
Thanks.

So.
I'm finishing two old-style boats with 31.5 inches long

I think putting the motor 46m on the sport model and 21m in the traditional model

The weight of both without electronics and motor is 1050grs.

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Old 12-21-2011, 09:50 AM
  #4  
carlosam
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Default RE: Asp 21m & Asp 46m

well,
Now he begins the work,
I just received my engine ASP 21m, which seems to be well finished.
Unfortunately the manual is very general and does not show any difference between the model sailing for model aircraft.
Speak to use fuel with 10% nitro, but says nothing in the percentage of nitro.
Talks about the recommended 8X6 propeller doubt there, break in the engine on the bench with this propeller, or ride on the boat with the propeller 42mm X 1.2 ?????
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Old 12-21-2011, 01:54 PM
  #5  
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Default RE: Asp 21m & Asp 46m

Nice older boats. You do have the engines already.Yes it can be done. My concern is the oils left behind after you run a nitro engine. And your going to have to cut open the top ,for air. And add servos and receiver inside a water tight box. Id leave the hulls as is. Going electric would be better and easier. but you got engines. Can you turn the exhaust pipe over ,so the exhaust is going out the back. If your dead set on a nitro hull ,I suggest Dumas kit http://www.dumasproducts.com/index.p...aprh8vct954a34
all the work is done as far as a running hull.
Old 12-21-2011, 02:42 PM
  #6  
carlosam
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Default RE: Asp 21m & Asp 46m

ORIGINAL: advanced builder

Nice older boats. You do have the engines already.Yes it can be done. My concern is the oils left behind after you run a nitro engine. And your going to have to cut open the top ,for air. And add servos and receiver inside a water tight box. Id leave the hulls as is. Going electric would be better and easier. but you got engines. Can you turn the exhaust pipe over ,so the exhaust is going out the back. If your dead set on a nitro hull ,I suggest Dumas kit http://www.dumasproducts.com/index.p...aprh8vct954a34
all the work is done as far as a running hull.
Ok,


This boat is a clone Diva aeronaut, who just built, I did the same clone as the princess as well, both with 800mm and 900 grams
I will ride that follows the sequence of construction.
The diva has air inlet from the sides and front, and also has air vents.I did not understand the kit from dumas
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Old 12-21-2011, 02:46 PM
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carlosam
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Default RE: Asp 21m & Asp 46m

more,
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Old 12-21-2011, 02:50 PM
  #8  
carlosam
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Default RE: Asp 21m & Asp 46m

and more pics,
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Old 12-21-2011, 02:53 PM
  #9  
carlosam
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Default RE: Asp 21m & Asp 46m

more pics
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Old 12-21-2011, 03:07 PM
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Default RE: Asp 21m & Asp 46m

Carlo
Both ASP (.21 & .46) are basicaly sport airplane engines with water cooling and a flywheel. The .21 will run nice with a 40mm prop and maybe a 45mm for the .46,they are not high rpm engines and will do fine in a scale application. They don't require high nitro fuel,5%<10% will be fine but they will need good lubrification (around 20% with some castor content). It wasn't uncommon years ago to run scale boats with glow or diesel engines or even ignition. Your boats look much nicer than what cames out of Dumas so far! so you'll be Ok. As advanced builder noted the engine compartiment will need air flow and the electronic (Rx,servos,Rx batt.)must be in a box to protect them from oil and spray. Scale boats don't easily flip over when run in a scale fashion so it doesn't even need to be fully water proof as when used for racing boats. Back in the days 5cc (.29)glow IC were used in boats around 1 meter long with good results when engines weren't as powerful as today! Keep us informed of your progress.
Old 12-21-2011, 03:11 PM
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Default RE: Asp 21m & Asp 46m

Just noticied the line at the bottom of your posts:

"Be happy is to stop being a victim and becoming an author of the history itself"

So true, Lampiao would be glad to see that
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Old 12-21-2011, 03:41 PM
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carlosam
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Default RE: Asp 21m & Asp 46m

Cariolan, thank you to clarify some doubts.

I have homemade fuel that is methanol and castor oil, and also have wildcat 10% nitro and 18% oil, so it will take to use.
Photos not shown, but I made a waterproof case.
How to soften the engine (break in) I do not know if the bench with propeller model airplane, or do direct the boat.
Old 12-21-2011, 03:55 PM
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Default RE: Asp 21m & Asp 46m

You can do the break-in on bench with an aircraft prop as load but since its a water cooled engine with no convection fins you'll need to provide water circulation. The ASP engines are ABC type and don't require a long break-in( a few bench runs should be enough to have everything fitting nicely). Some nitro (5/10%)makes idling better but not important,mixing a FAI blend (80%methanol-20% castor)would be fine too and at least you'd know exactly what is in your fuel!
Old 01-04-2012, 12:19 PM
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carlosam
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Default RE: Asp 21m & Asp 46m


ORIGINAL: coriolan

You can do the break-in on bench with an aircraft prop as load but since its a water cooled engine with no convection fins you'll need to provide water circulation. The ASP engines are ABC type and don't require a long break-in( a few bench runs should be enough to have everything fitting nicely). Some nitro (5/10%)makes idling better but not important,mixing a FAI blend (80%methanol-20% castor)would be fine too and at least you'd know exactly what is in your fuel!
I think I'll break in the engine without the propeller 8 X 6 because you can not find the firewell to taper.
I have a 42mm propeller, pitch 1.2, I do not know if I replace while waiting 40mm propeller, and pitch 1.4 (break-in the engine)
( I ordered a prop, 38 X 1, 4 and 40 X 1.4 )
I did the engine mount with damping as pics below.
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Old 01-08-2012, 08:58 AM
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Default RE: Asp 21m & Asp 46m

.
Old 01-08-2012, 09:00 AM
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Default RE: Asp 21m & Asp 46m

I'm interested on how the ASP Marine engines will run. I just purchased the ASP .46 Marine for a 36" Dumas Skdaddle project I've been working off and on again for about a year. The engine looks pretty good and I have searched the web but have not really found any bad comments about them. Anyone use these engines before? Comments good or bad? When I get back from Afghanistan in February, the engine I ordered should be there, and I can't wait to review it then! Steve
Old 01-08-2012, 12:12 PM
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Default RE: Asp 21m & Asp 46m

The ASP line of engines are reasonably well made and good value, here is a review of the larger ASP .52:
http://www.rcmodelreviews.com/asp52_review.shtml
We used to run ASP .12 at my club in the 90's with 18"<20" hulls and they were zippy. Should perform well in a SK Daddle which was run with a .35/.40 loop scavanged in the 70's. Here is a picture of another SK Daddle(sadly for electric!):
http://www.rcgroups.com/forums/showp...0&postcount=13
HK has spare parts for them:
http://www.hobbyking.com/hobbyking/s...r=&LiPoConfig=
Old 01-08-2012, 06:31 PM
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Default RE: Asp 21m & Asp 46m

Thanks Coriolan,

I'll look it up today! I can't wait to get home, install this thing and run it!

Here's a picture of the boat I plan on putting the ASP .46M in. I plan on changing the trim tabs etc once I get home as well.

Steve
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Old 01-31-2012, 07:50 AM
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carlosam
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Default RE: Asp 21m & Asp 46m

There is a strap for starting the engine with the starter?
What would be suitable for this engine?
I have a hobbico 90 TorqMaster Starter.
Old 01-31-2012, 03:42 PM
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Default RE: Asp 21m & Asp 46m

The Hobbico-90 will be enough to start that size of engine as long as you use a good 12V battery(car size can give more current than motorcycle batt.). The Sullivan line os starters are a lot better but more expensive! for a starting belt you can use that:
Starter Belt for belt start boat engines. 17" length. Fits all Sullivan cones with pulley groove. No. S626
http://www.sullivanproducts.com/Star...sMainFrame.htm
Old 02-01-2012, 02:16 PM
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carlosam
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Default RE: Asp 21m & Asp 46m

so coriolan,

You always helpful,thanks

My experience was until now in model airplanes and airboats, I have done 7 airboats.

This is my first boat, with a submerged propeller.

I am very grateful for your goodwill in help.

I have glow plug A3 and A8. I think break-in with A3 and 5%nito/18%oil.

The belts, hobbyone representative of Sullivan and aeromodelli, no belts.I'll have to look for something to be able to use.[:@]
Old 02-01-2012, 07:14 PM
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Default RE: Asp 21m & Asp 46m

In the old days(before electric starters)we just used a leather string under the flywheel. It work remarquably well if the boat is on a stand and you have somebody hold it while you "rope" it. Or just send me a PM and I'll mail you one as I have several doing nothing during the winter[&o]
Old 02-02-2012, 10:22 AM
  #23  
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Default RE: Asp 21m & Asp 46m

ORIGINAL: coriolan

In the old days(before electric starters)we just used a leather string under the flywheel. It work remarquably well if the boat is on a stand and you have somebody hold it while you ''rope'' it. Or just send me a PM and I'll mail you one as I have several doing nothing during the winter[&o]
Thanks,

I sent pm
Old 07-17-2012, 08:00 AM
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Default RE: Asp 21m & Asp 46m

Interesting thread.
Old 09-02-2014, 02:15 AM
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after some time, follows the continuity of the construction












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