Search found 14 matches

by sjdurgule
Thu Apr 18, 2013 4:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston weight.
Replies: 10
Views: 6849

Re: Piston weight.

Can we use aluminium (with cast iron cylinder) to reduce the weight of the piston ?

-Satyaviajy.
by sjdurgule
Tue Apr 16, 2013 9:57 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston weight.
Replies: 10
Views: 6849

Re: Piston weight.

Thank Ian, for your detail information.

Satyavijay.
by sjdurgule
Mon Apr 15, 2013 10:17 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston weight.
Replies: 10
Views: 6849

Re: Piston weight.

Thanks Ian. I appreciate your helping nature to all.
Sir, what will be the appropriate length of piston for 35 mm OD (without seals) ?

Satyaviajy.
by sjdurgule
Sun Apr 14, 2013 11:03 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston weight.
Replies: 10
Views: 6849

Piston weight.

I am thinking to make cast iron piston for beta kinematic engine of following specifications. If any suggestions / corrections please guide - 1. OD- 35 mm 2. Length - 35 mm 3. Displacer Rod Dia - 5mm 4. There will be no any seals. Is this heavy piston will work for beta engine ? What will be the wei...
by sjdurgule
Wed Feb 27, 2013 2:02 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: large lamina flow build
Replies: 139
Views: 157500

Re: large lamina flow build

by sjdurgule
Tue Feb 12, 2013 2:41 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Volume ratio for free piston stirling engine
Replies: 8
Views: 7459

Volume ratio for free piston stirling engine

What is the required volume ratio (compression ratio) for free piston stirling engine ? Whether is it lower or higher than kinematic stirling engines ?

-Satyavijay
by sjdurgule
Mon Feb 04, 2013 12:05 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston sealing
Replies: 9
Views: 4618

Re: Piston sealing

Thanks Ian. After so many changes my free piston engine is physically ready and by pressing it's piston, displacer moves accordingly. I have used magnets for spring action. The engine is vertical and heater is at top and hence it is difficult to heat it. I tried with press iron to heat but it is not...
by sjdurgule
Tue Oct 09, 2012 7:55 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston sealing
Replies: 9
Views: 4618

Re: Piston sealing

Thanks for your suggessions. I am thinking to use mechanical spring (for easy to adjust) for piston and gas spring for displacer. If I give more heat (500-550*c) then whether it is possible to run FPSE horizontally ?
by sjdurgule
Mon Oct 08, 2012 3:34 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston sealing
Replies: 9
Views: 4618

Re: Piston sealing

As per Ian I have prepared the MS cylinder of ID 25mm & one CI piston & one MS piston. Both cylinder and piston are grinded. Piston OD is kept less by 4 to 5 micron. CI piston is smooth as told by Ian. Pistons are free in the cylinder & if I press the the piston it resists and bounces ba...
by sjdurgule
Thu Sep 27, 2012 4:46 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston sealing
Replies: 9
Views: 4618

Re: Piston sealing

Thank you very much, Ian. Now I will prepare the cylinder (MS) and piston (CI) and I am thinking to grind the cylinder and piston. Then I will take sliding test and put the results on this forum.
by sjdurgule
Wed Sep 26, 2012 4:41 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston sealing
Replies: 9
Views: 4618

Re: Piston sealing

Thanks Ian for reply. I am preparing cast iron piston (now it is in workshop for turning) in mild steel cylinder as per your comments / remarks on this forum. But I want to know how much microns it should be less than cylinder ID & if I press the piston in cylinder (keeping other end of cylinder...
by sjdurgule
Wed Sep 26, 2012 12:25 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Piston sealing
Replies: 9
Views: 4618

Piston sealing

Can we give teflon coat on piston for sealing purpose ? and whether it will work in 300-400 degree celcius ?
by sjdurgule
Thu Feb 15, 2007 9:25 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermo acoustic mobile
Replies: 3
Views: 6653

Very nice work ! Whether small diameter piece is must between heater cylinder and power piston cylinder is neccessary? What is the torque? I am wating for your plans.
by sjdurgule
Thu Feb 15, 2007 11:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pre checks
Replies: 1
Views: 5063

Pre checks

I am very new to this forum.I am constructing themoacoustic stirling engine but my first try failed. Flywheel is not rotating due to vaccume and compression before applying heat to the engine. My question is whether after constructing engine and before applying heat if I try to move flywheel, should...